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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.


How voltmeters, ammeters and other meters work.

Report on assembling the Heathkit IM-16 solid-state voltmeter.
AUDIO AMATEUR 3/1971 [Apr 1972] (v.2#3) pg. 12

Measuring a component's frequency response. Looks at four common sources of error. Includes a basic set-up for using a calibrated attenuator or "gain set" method of measuring frequency response.
AUDIO AMATEUR 3/1974 [Feb 1975] (v.5#3) pg. 8

Upgrading your voltmeter. Convert a cheap 20k Ohm per Volt input impedance meter into a 10M Ohm constant impedance unit with this circuit.
AUDIO AMATEUR 4/1978 [Nov 1978] (v.9#4) pg. 40

VTVM improvements include a battery eliminator and a calibration circuit.
AUDIO AMATEUR 4/1978 [Nov 1978] (v.9#4) pg. 40

Improving Heath's IM-25 and IM-16 analog voltmeters.
AUDIO AMATEUR 1/1982 [Jan 1982] (v.13#1) pg. 18
Added Info AUDIO AMATEUR 5/1982 [Jan 1983] (v.13#5) pg. 40 (IM-17 model)

Report on the Fluke 8050A digital multimeter.
AUDIO AMATEUR 1/1982 [Jan 1982] (v.13#1) pg. 40

Warning about spikes when using digital multimeters for audio applications.
AUDIO AMATEUR 3/1982 [Aug 1982] (v.13#3) pg. 54
Added Info AUDIO AMATEUR 5/1982 [Jan 1983] (v.13#5) pg. 56

RMS AC voltmeter with dB converter.
AUDIO AMATEUR 2/1983 [Jun 1983] (v.14#2) pg. 12
Correction AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 54

Build an A-weighting filter. Building a meter preamp to make measurements at very low (microvolt) signal levels using a vacuum-tube voltmeter, digital voltmeter, or oscilloscope.
AUDIO AMATEUR 2/1992 [Jun 1992] (v.23#2) pg. 32
Added Info AUDIO AMATEUR 3/1992 [Sep 1992] (v.23#3) pg. 46

Linear AC measurements using a "diode". Using a synchronous rectifier circuit to measure AC voltage and current with DC meters.
AUDIOXPRESS Jun 2001 (v.32#6) pg. 66

Circuit for an 8 channel 3.5-digit voltmeter built around the Motorola MC14433 3.5-digit analog-to-digital converter integrated circuit. Plugged into a minicomputer, it uses a simple program to display voltage readings on a video terminal.
BYTE Dec 1977 (v.2#12) pg. 76
Added Info BYTE Jan 1978 (v.3#1) pg. 37

Four household circuit testers and what each will and won't do.
CANADIAN WORKSHOP Mar 1986 (v.9#6) pg. 18

Experimenting with Motorola's 68HC11 true single-chip computer. Part 6. SBC (single-board computer) applications. A look at MAG-11's binary output and how to use it A/D converter. Using the MAG-11 as a binary-display digital voltmeter and a bargraph photometer that measures foot-candles.
COMPUTERCRAFT Dec 1992 (v.2#12) pg. 16

Digital voltmeter uses a National Semiconductor DS8700 (ADD 2500) IC and a common cathode LED readout and a few other inexpensive parts.
CQ. THE RADIO AMATEUR'S JOURNAL Jun 1980 (v.36#6) pg. 84

Modifying a digital panel meter (DPM) to measure voltages other than 200 millivolts (full scale).
CQ. THE RADIO AMATEUR'S JOURNAL Apr 1993 (v.49#4) pg. 100

Single chip 4.5-digit digital voltmeter and continuity checker.

RF Blocking probe for your VOM.
ELECTRONICS ILLUSTRATED May 1963 (v.6#3) pg. 72

Simple scope calibrator turns scope into peak-to-peak voltmeter.
ELECTRONICS ILLUSTRATED Sep 1964 (v.7#5) pg. 89

Ammeter adapter makes vacuum-tube voltmeter capable of measuring current.
ELECTRONICS ILLUSTRATED Jul 1965 (v.8#4) pg. 63

VOM meter saver. A diode bypass circuit around meter when full-scale deflection voltage is exceeded prevents damage to VOM meters.
ELECTRONICS ILLUSTRATED Mar 1966 (v.9#2) pg. 86

Selection and use of the VOM (Volt-Ohm-Milliammeter).
ELECTRONICS ILLUSTRATED Nov 1966 (v.9#6) pg. 70

Pocket size VTVM has VDC ranges of 5, 50, and 500 volts. Does not measure AC or resistance. Est. cost: $15.
ELECTRONICS ILLUSTRATED Jul 1968 (v.11#4) pg. 26

A FET millivoltmeter measures AC from 5 millivolts to 500 volts. Battery powered, large face, flat response from 10 cps to 1 mc, and input impedance of 1 megohm. Est. cost: $25.
ELECTRONICS ILLUSTRATED Sep 1968 (v.11#5) pg. 73

Using the vacuum tube voltmeter (VTVM).
ELECTRONICS ILLUSTRATED Mar 1969 (v.12#2) pg. 38

Calibrator turns an oscilloscope into a voltmeter.
ELECTRONICS ILLUSTRATED Mar 1969 (v.12#2) pg. 83

Adapter increases the input impedance of a VOM to that of a VTVM.
ELECTRONICS ILLUSTRATED May 1969 (v.12#3) pg. 96

Measure the output power of Citizens Band transmitters with this accessory for your VOM or VTVM. Est. cost: $4.
ELECTRONICS ILLUSTRATED Sep 1969 (v.12#5) pg. 97

Solid state VOM uses a field-effect transistor. 10-megohm input impedance, AC and DC ranges, 0.5 V scale, 9-volt battery powered. Est. cost: $25.
ELECTRONICS ILLUSTRATED Jan 1970 (v.13#1) pg. 47

Single-chip DVM (digital voltmeter). Has a full 4.5-digit display and allows measurement resolution of 10 microvolts. Also serves as a continuity tester.
ELECTRONICS NOW Apr 1993 (v.64#4) pg. 59

Mini metrology lab to study the science of electrical measurements (electrical metrology). Make high-accuracy DC measurements and calibrate other test equipment. Part 2. Build a null detector (null meter, DC null voltmeter), a very sensitive, center-zero voltmeter.
ELECTRONICS NOW Apr 1996 (v.67#4) pg. 33
Added Info ELECTRONICS NOW Jun 1996 (v.67#6) pg. 10

Time-period adapter. Expand the measuring capabilities of your digital multimeter (DMM) with this easy to build and simple to operate accessory. Allows you to measure a low-frequency waveform accurately.
ELECTRONICS NOW Apr 1996 (v.67#4) pg. 39

Build this mini high-voltage probe. Increase your voltmeter's input impedance and measure up to 7500 volts with this easy-to-build accessory. Est. cost: $10-$20.
ELECTRONICS NOW Aug 1996 (v.67#8) pg. 51

Four essential test instruments. DC power supplies, function generators, bench digital multimeters, and frequency counters. An examination of their applications and key features.
ELECTRONICS NOW Aug 1996 (v.67#8) pg. 69

Tonal voltmeter. This circuit gives an audible indication of voltage levels (up to 15 volts DC).
ELECTRONICS NOW Sep 1996 (v.67#9) pg. 61

Using the 7107 integrated circuit chip. It is a combination analog-to-digital converter, reference voltage, timing clock, and decoder/driver circuit for 7-segment LED displays. Circuits shown for a digital voltmeter, DC current meter, resistance meter, capacitance meter, frequency meter, etc.
ELECTRONICS NOW Nov 1996 (v.67#11) pg. 55
Correction ELECTRONICS NOW Feb 1997 (v.68#2) pg. 12

Build a conductance adapter for your multimeter. Extend your DMM's range to include resistance in gigohms and current in picoamps.
ELECTRONICS NOW Feb 1997 (v.68#2) pg. 61

Build your own audio test gear. Five pieces of test gear, plus how and why they are used. (1) Audio signal generator. (2) Audio voltmeter. (3) Simple LED oscilloscope. (4) Distortion analyzer. (5) Wow-and-flutter meter. Part 1. An overview.
ELECTRONICS NOW Jun 1997 (v.68#6) pg. 26

Effective use of the VOM. A knowledge of the meter specifications, along with their proper interpretation, are required for effective use.
ELECTRONICS WORLD Apr 1966 (v.75#4) pg. 82

FET voltmeter. Circuit for a transistorized version of the vacuum-tube voltmeter circuit. Uses the inexpensive field-effect transistor (FET). As accurate as most commercial VTVMs.
ELECTRONICS WORLD Feb 1967 (v.77#2) pg. 63
Added Info ELECTRONICS WORLD Nov 1967 (v.78#5) pg. 12

How to read the decibel scale on VOM or VTVM meters. A simpler and more meaningful way to indicate signal voltage amplitide or voltage gain.
ELECTRONICS WORLD May 1968 (v.79#5) pg. 78

Meter safety box automatically disconnects a VOM from the power circuit whenever its function switch is reset, as, for example, when switching from measuring voltage to measuring current.
ELECTRONICS WORLD Jun 1968 (v.79#6) pg. 59

Circuit for an accurate, reliable, low-cost DC voltmeter. Measures 0-100 milliampere, 1 ampere, or 10 amperes for long periods without overheating, with voltage ranges of 0 to 10 and 100 volts. Accuracy of 2-3 %. Est. cost: $30.
ELECTRONICS WORLD Oct 1968 (v.80#4) pg. 76

Low-cost precision calibrator for oscilloscope and VTVM.
ELECTRONICS WORLD Mar 1969 (v.81#3) pg. 80

Solid-state VOM measures DC voltages from 150 millivolts full-scale to 1500 volts full-scale, and resistance from 10 ohms to 1 megohm.
ELECTRONICS WORLD Jan 1970 (v.83#1) pg. 74

MOFSET utility 20-dB preamp for oscilloscope, AC voltmeter or VTVM. Also usable with microphones.
ELECTRONICS WORLD Aug 1970 (v.84#2) pg. 62

VTVM battery eliminator. Simple regulated power supply that replaces C-cell ohmmeter supply.
ELECTRONICS WORLD Apr 1971 (v.85#4) pg. 72

Method used by an Air Force laboratory to calibrate digital voltmeters.
ELECTRONICS WORLD Jun 1971 (v.85#6) pg. 36

Explanation and use of meters. Volt, Ohm, Milliammeters, Meggars, and Galvanometers.
ELEMENTARY ELECTRONICS May-Jun 1966 (v.2#2) pg. 21

Special VOM for photographers. Checks flashlight cells under load, B-C flashgun cells, high voltage electronic flash batteries and sync cords. Est. cost: $8.
ELEMENTARY ELECTRONICS Nov-Dec 1966 (v.3#2) pg. 93

The hows and whys of voltage measurement. Most of the frequently-encountered problems of the experimenter and technician are successfully analyzed by making simple tests.
ELEMENTARY ELECTRONICS Jan-Feb 1967 (v.3#3) pg. 49

Measuring capacitance with your VTVM. Capacitance adapter allows capacitance from .001 to 10 microfarads to be measured on a vacuum-tube voltmeter. Use any meter having a 3- or 5-volt range. Est. cost: $7.
ELEMENTARY ELECTRONICS May-Jun 1967 (v.4#2) pg. 51

RF probe is a diode detector which converts RF energy to a measurable DC value. Est. cost: $4.
ELEMENTARY ELECTRONICS Jul-Aug 1968 (v.6#3) pg. 73

HI-FET voltmeter will allow accurate voltage readings on low-impedance circuits. The device is less expensive than a commercial vacuum tube voltmeter. Est. cost: $20.
ELEMENTARY ELECTRONICS Jan-Feb 1970 (v.9#3) pg. 43

MilAdapter, an accessory that allows you to measure electrical current on a VTVM.
ELEMENTARY ELECTRONICS Sep-Oct 1970 (v.10#4) pg. 81

All new basic course in electricity and electronics. Understanding multimeters. Part 1.
ELEMENTARY ELECTRONICS Jan-Feb 1973 (v.13#1) pg. 83

All new basic course in electricity and electronics. Understanding multimeters. Part 2.
ELEMENTARY ELECTRONICS Mar-Apr 1973 (v.13#2) pg. 87

Build a field-effect transistor volt-ohm meter with a very high (20 megohm) input resistance on all ranges. Est. cost: $20.
ELEMENTARY ELECTRONICS Sep-Oct 1974 (v.14#5) pg. 63

Basic course in electricity and electronics. How to measure electricity. Different types of meters and how to use them to measure voltage and current.
ELEMENTARY ELECTRONICS Jul-Aug 1975 (v.15#4) pg. 79

Digital voltmeter (DVM) is built into a L'eggs brand panty hose container. It features a 3-digit LED readout. Goes from 00.0 to 99.9 volts dc (+ or -) in 0.1-volt steps. Has an input impedance over 1 megohm. Est. cost: $35.
ELEMENTARY ELECTRONICS May-Jun 1976 (v.16#3) pg. 43

Super-accurate voltage source for calibrating your VOM or VTVM. Uses only two components (a mercury cell and a resistor).
ELEMENTARY ELECTRONICS May-Jun 1976 (v.16#3) pg. 78

Replace the long test leads found on bench volt-ohmeters and similar equipment with coil-cords, those cords that are coiled up but can be pulled longer as needed. Convert photoflash cords into coiled test leads.
ELEMENTARY ELECTRONICS Jul-Aug 1977 (v.17#4) pg. 71

Basic course in electricity and electronics. How to use a VOM to measure electricity.
ELEMENTARY ELECTRONICS Sep-Oct 1978 (v.18#5) pg. 77

Build a precision voltage source for calibrating voltmeters and oscilloscopes. This battery powered source will deliver a nominal 2.45-volts DC.
ELEMENTARY ELECTRONICS Jan-Feb 1980 (v.20#1) pg. 71

Elementary Electronic's basic course in electricity and electronics. The origins, theory, and use of the digital multimeter.
ELEMENTARY ELECTRONICS Jan-Feb 1980 (v.20#1) pg. 77

Digital voltmeter for the dashboard of your car keeps track of your electrical system while you drive. Estimated cost: $28.
ELEMENTARY ELECTRONICS Mar-Apr 1980 (v.20#2) pg. 33

How to use a volt-ohm meter.
FAMILY HANDYMAN #200 Jul-Aug 1979 (v.29#6) pg. 24

Using electrical testers. Tips on using a circuit analyzer, continuity tester, circuit tester, and multimeter.
FAMILY HANDYMAN #305 Feb 1990 (v.40#2) pg. 8

Tips on using a multitester to test electrical devices.
FAMILY HANDYMAN #355 Feb 1995 (v.45#2) pg. 80

Making milliohm measurements. Getting an accurate milliohm reading is easy when you know the correct method. Includes a schematic for an analog millivoltmeter.
HANDS-ON ELECTRONICS May-Jun 1986 (v.3#3) pg. 84

Selecting and using multimeters. Looks at analog, electronic, and digital versions.
HANDS-ON ELECTRONICS Jan 1987 (v.4#1) pg. 43

VOM range extender is designed to suppress any voltage up to the voltage of the battery used in the circuit.
HANDS-ON ELECTRONICS Jun 1987 (v.4#6) pg. 91

Converting from dot and bar indicators to other forms of readout. (1) Interface circuit allows a dot/bar display to be replaced by a numerical readout. Standing alone, it will also operate as a two-range, single-digit DC voltmeter. (2) Circuit converts a dot, bar, or digital display to a distinct audio tone which differs for each digit.
HANDS-ON ELECTRONICS Dec 1987 (v.4#12) pg. 93

Build the MOSFET voltmeter. Will measure voltage without scrimping on the readout or interrupting the test circuit's operation. Uses separate probes for measuring AC or DC current.
HANDS-ON ELECTRONICS Jan 1988 (v.5#1) pg. 45

VTVM Battery Substitute can be fed from an ordinary 6.3-volt filament transformer.
HANDS-ON ELECTRONICS Mar 1988 (v.5#3) pg. 96

Simple circuit feeds any applied voltage to the meter with the correct polarity.
HANDS-ON ELECTRONICS Aug 1988 (v.5#8) pg. 92

Capacitance adapter for your DMM (digital multimeter) lets you measure capacitance up to 2.2 microfarads.
HANDS-ON ELECTRONICS Nov 1988 (v.5#11) pg. 44

How to use a VOM meter.
HANDY ANDY Nov 1980 (v.5#2) pg. 10

Troubleshooting electrical problems with a voltmeter. How to diagnose the most common auto and home wiring breakdowns.
HOME MECHANIX #700 Aug 1986 (v.82) pg. 60

How to use a volt-ohmmeter.
HOMEOWNER Jul-Aug 1984 (v.9#6) pg. 49

Basic electricity. Part 3. How to select a VOM, a tester every home needs.
HOMEOWNERS HOW TO #7 Fall 1977 (v.2#3) pg. 70

Basic electricity. Part 4. How to test voltage and resistance using a voltmeter (VOM).
HOMEOWNERS HOW TO Jan-Feb 1978 (v.3#1) pg. 81

A short course in basic electricity. Part 5. How to make simple and safe resistance or continuity tests on home appliances.
HOMEOWNERS HOW TO Mar-Apr 1978 (v.3#2) pg. 85

Meter demonstrator for classroom use can illustrate the function of a voltmeter or an ammeter.
INDUSTRIAL EDUCATION May-Jun 1978 (v.67#5) pg. 52

Tips on calibrating ammeters, ohmmeters, wattmeters, etc.
INDUSTRIAL EDUCATION Nov 1979 (v.68#8) pg. 48

Make an expanded-scale voltmeter (8 to 16 volts DC) to monitor an aircraft electrical system.
KITPLANES Jun 1993 (v.10#6) pg. 6
Added Info KITPLANES Sep 1993 (v.10#9) pg. 2

Digital multimeters. Advice on selection and use when troubleshooting aircraft electrical systems.
LIGHT PLANE MAINTENANCE Sep 1993 (v.15#9) pg. 15

Instructions for using a VOM multimeter to check household and auto electrical problems.
MECHANIX ILLUSTRATED #461 Oct 1966 (v.62) pg. 116

Hook up your PET computer to the world with this digital-voltmeter interface which lets you monitor and record readings from outside devices. Est. cost: $5.
MICROCOMPUTING #75 Mar 1983 (v.7#3) pg. 132

How to attach a fold-up wire stand to an inexpensive digital multimeter to hold it at a convenient angle for reading the meter.
MODEL AVIATION Jul 1993 (v.19#7) pg. 91

Circuit will allow you to measure capacitance on a VOM.
MODERN ELECTRONICS [1] Feb 1978 (v.1#1) pg. 72

Schematic for an amplifier for a VTVM to get accurate readings in the 0 to 20mV dc range. Circuit uses an LM308 integrated circuit.
MODERN ELECTRONICS [1] Oct 1978 (v.1#8) pg. 6

Twin electronic multimeter. Lab quality dual electronic multimeter with right-reading ohm scales. Features a linear resistance measurement scale. Twin meters allow you to measure voltage input and voltage output at the same time. Unit is powered by a 9-volt battery.
MODERN ELECTRONICS [1] Oct 1978 (v.1#8) pg. 58

Circuit for adding a meter to a power supply to measure the output up to 15-volts.
MODERN ELECTRONICS [1] Dec 1978 (v.1#9) pg. 8

Using and misusing multimeters. Here are a host of tips on getting the most service out of a multimeter.
MODERN ELECTRONICS [2] Dec 1984 (v.1#3) pg. 52

A true-rms adapter. This accessory lets you use a standard 3.5-digit DMM (digital multimeter) to measure true-rum voltages. Est. cost: $50.
MODERN ELECTRONICS [2] Jun 1985 (v.1#9) pg. 56
Correction MODERN ELECTRONICS [2] Aug 1985 (v.2#2) pg. 4

Thermometer accessory. A simple construction project lets you measure temperatures (Kelvin, Celsius or Fahrenheit) with any voltmeter.
MODERN ELECTRONICS [2] Oct 1985 (v.2#4) pg. 50
Added Info MODERN ELECTRONICS [2] Jan 1986 (v.3#1) pg. 5

Measure high-frequency AC volts. Probe/voltmeter measures rms volts from 10 Hz to beyond 10 MHz and also functions as an amplitude-modulation detector.
MODERN ELECTRONICS [2] Jan 1986 (v.3#1) pg. 52

Digital measuring system. Build a highly accurate, low-cost 3-digit panel meter that serves as the basic building block for a wide range of speciality add-on function modules (digital multimeter, tachometer, thermometer, etc.).
MODERN ELECTRONICS [2] Aug 1986 (v.3#8) pg. 22
Correction MODERN ELECTRONICS [2] Nov 1986 (v.3#11) pg. 5
Correction MODERN ELECTRONICS [2] Dec 1986 (v.3#12) pg. 5
Added Info MODERN ELECTRONICS [2] Feb 1988 (v.5#2) pg. 32
Added Info MODERN ELECTRONICS [2] Aug 1988 (v.5#8) pg. 34
Added Info MODERN ELECTRONICS [2] Nov 1988 (v.5#11) pg. 5

Measure voltage using a personal computer by adding a voltage-to-frequency converter onto an input port line.
MODERN ELECTRONICS [2] Mar 1987 (v.4#3) pg. 60

Temperature probe for your multimeter can measure down to 0 degrees and below.
MODERN ELECTRONICS [2] Jul 1987 (v.4#7) pg. 40

Frequency-counter adapter for digital multimeters. Frequency-to-voltage converter enables almost any waveform up to 1 MHz to be read accurately on a DVM or DMM.
MODERN ELECTRONICS [2] Nov 1987 (v.4#11) pg. 16
Added Info MODERN ELECTRONICS [2] Jan 1988 (v.5#1) pg. 7
Added Info MODERN ELECTRONICS [2] May 1988 (v.5#5) pg. 94

High-current shunt for DMMs (digital multimeters) extends current-measuring capability beyond the usual 10 amperes.
MODERN ELECTRONICS [2] Aug 1988 (v.5#8) pg. 48

Troubleshooting with dc voltmeters. Helpful hints for getting the most out of your multimeter's dc voltmeter mode.
MODERN ELECTRONICS [2] Oct 1988 (v.5#10) pg. 14
Correction MODERN ELECTRONICS [2] Jan 1989 (v.6#1) pg. 86

An audible AC/DC voltmeter sounds a tone whose frequency is proportional to the voltage being measured. Four input ranges are 200 millivolts, and 2, 20 and 200 volts.
MODERN ELECTRONICS [2] Jan 1989 (v.6#1) pg. 18

Digital milliohmmeter adapter lets you accurately measure less than 1 ohm with a digital multimeter (DMM).
MODERN ELECTRONICS [2] Mar 1989 (v.6#3) pg. 35

How to use DC voltmeters. Some useful tricks of the trade for getting the most out of your meter.
MODERN ELECTRONICS [2] Jul 1989 (v.6#7) pg. 36

A precision thermocouple thermometer. Voltmeter accessory lets you measure temperature with one-tenth-degree resolution.
MODERN ELECTRONICS [2] Dec 1989 (v.6#12) pg. 28
Added Info MODERN ELECTRONICS [2] Jul 1990 (v.7#7) pg. 5

A maximum/minimum voltage detector. This voltmeter accessory tracks highest or lowest voltage, light, or other physical parameter levels for testing, troubleshooting and other applications.
MODERN ELECTRONICS [2] Apr 1990 (v.7#4) pg. 32
Correction MODERN ELECTRONICS [2] Jun 1990 (v.7#6) pg. 4

Tonal voltmeter. This circuit will give an audible indication of voltage levels.

Mini high-voltage probe. Increase your voltmeter's input impedance and measure up to 7500 volts with this easy-to-build accessory. Est. cost: $20.

Field-effect transistor voltmeter.
POPULAR ELECTRONICS [1] Jul 1964 (v.21#1) pg. 45

Simple neon tube device tells approximate voltage.
POPULAR ELECTRONICS [1] Aug 1964 (v.21#2) pg. 82

Miniature (5"x4"x3") VTVM has a constant resistance of 10 megohms on all ranges. Battery powered.
POPULAR ELECTRONICS [1] Jan 1965 (v.22#1) pg. 55

Replace flashlight cells in VTVMs with a nickel-cadmium battery which will be recharged as the VTVM is used.
POPULAR ELECTRONICS [1] May 1966 (v.24#5) pg. 66

VOM range splitter. Double the number of voltage ranges on your multimeter with this accessory.
POPULAR ELECTRONICS [1] Jan 1967 (v.26#1) pg. 70

Multipurpose FET signal tracer. Can be used as a millivoltmeter, output meter, microphone preamplifier, auxiliary audio amplifier, tape recorder monitor, etc., as well as a sensitive signal tracer.
POPULAR ELECTRONICS [1] Apr 1967 (v.26#4) pg. 43

Simple adapter to make a VOM act like a $200 transistorized voltmeter. Battery powered adapter uses a field-effect transistor and makes the synthetic VTVM independent of a 117-volt power line. Est. cost: $10.
POPULAR ELECTRONICS [1] Jul 1967 (v.27#1) pg. 57

Direct-current electronic voltmeter. Almost non-loading voltmeter measures from 0.5 to 150 volts. This unit is ideal for testing semiconductor circuits because of its input resistance of only 1 megohm-per-volt on the lowest ranges. Est. cost: $20.
POPULAR ELECTRONICS [1] Nov 1967 (v.27#5) pg. 57

Measure AC amps and watts with a VOM. Adapter to measure up to 1,000 watts or 10 amps AC.
POPULAR ELECTRONICS [1] Jan 1968 (v.28#1) pg. 61

Circuit for a millivoltmeter with a full-scale sensitivity of only 10 millivolts. Uses an integrated circuit.
POPULAR ELECTRONICS [1] Apr 1968 (v.28#4) pg. 86

An expanded scale AC voltmeter that reads between 90 and 130 volts is useful for monitoring household current.
POPULAR ELECTRONICS [1] Aug 1968 (v.29#2) pg. 55

Adapter to improve the sensitivity of an ordinary volt-ohmmeter. Adapter will convert it to high-input-resistance (10 megohms) and give it two more low voltage ranges (0.5 and 0.1 volt full scale).
POPULAR ELECTRONICS [1] Nov 1968 (v.29#5) pg. 72

Digital readout volt-ohmmeter. Self-zeroing and self-calibrating, three voltage scales (0-2, 0-20, 0-200), and four ohm scales (from 1 to 200,000). Est. cost: $80.
POPULAR ELECTRONICS [1] Dec 1968 (v.29#6) pg. 29
Added Info POPULAR ELECTRONICS [1] Sep 1970 (v.33#3) pg. 35

An accurate audio voltage calibration standard to adjust VTVM or oscilloscope. Est. cost: $35.
POPULAR ELECTRONICS [1] Jan 1969 (v.30#1) pg. 71

Instrument sensitivity booster (preamplifier) extends range of oscilloscope or VTVM.
POPULAR ELECTRONICS [1] Jul 1970 (v.33#1) pg. 43

Adapter for a VTVM to measure extremely high resistance (up to 50,000 megohms).
POPULAR ELECTRONICS [1] Aug 1970 (v.33#2) pg. 50

Millivolmeter designed to measure FET circuits without loading. Input resistance is 100 megohms with a 12 to 15 pF capacitance.
POPULAR ELECTRONICS [1] Jan 1971 (v.34#1) pg. 45

Assemble a digital volt-ohmmeter plug-in module for the digital measurements lab featured in the November 1970 issue. Voltage measurements to 1999 volts DC and resistance from 1 ohm to 199,000 ohms. Est. cost: $30.
POPULAR ELECTRONICS [1] Mar 1972 (v.1#3) pg. 60
Correction POPULAR ELECTRONICS [1] May 1972 (v.1#5) pg. 23

A discussion of the evolution and uses of VOMs, VTVMs and TVMs.
POPULAR ELECTRONICS [1] Mar 1972 (v.1#3) pg. 114

Constant-current circuit can be used with your VTVM to provide a linear-scale ohmmeter.
POPULAR ELECTRONICS [1] May 1972 (v.1#5) pg. 45

Low-cost millivolter. Measures between 1 mV and 1 volt full scale. Can also be used as AC voltmeter. Resistance of 10,000 ohms/mV.
POPULAR ELECTRONICS [1] Mar 1973 (v.3#3) pg. 44

Linear-scale ohmmeter covers from zero to 10 megohms in seven ranges. Unit also measures 3 ranges of dc millivolts (10, 100 and 1 volt) at 10 megohms per volt.
POPULAR ELECTRONICS [1] Sep 1973 (v.4#3) pg. 51

Surplus D'Arsonval movement meters are easily converted to special-purpose voltmeters and ammeters.
POPULAR ELECTRONICS [1] Apr 1974 (v.5#4) pg. 41

How and why to use a VTVM or VOM.
POPULAR ELECTRONICS [1] Sep 1974 (v.6#3) pg. 90

This front end circuit for a digital multimeter (DMM) will turn it into a frequency counter.
POPULAR ELECTRONICS [1] Oct 1974 (v.6#4) pg. 100

Range expander increases sensitivity by 10 or 100 times so you can measure low-millivolt AC and DC voltages. Can also be used on decibel scale.
POPULAR ELECTRONICS [1] Nov 1974 (v.6#5) pg. 52
Correction POPULAR ELECTRONICS [1] Feb 1975 (v.7#2) pg. 7

Build an auto-polarity and auto-zeroing digital multimeter. Est. cost: $100.
POPULAR ELECTRONICS [1] Dec 1974 (v.6#6) pg. 33
Correction POPULAR ELECTRONICS [1] Mar 1975 (v.7#3) pg. 6

Put your multimeter to use testing semiconductors, SCR's, triacs and your car.
POPULAR ELECTRONICS [1] Dec 1974 (v.6#6) pg. 94

Build the minivolter. Measures from 500 microvolts to 100 volts full-scale in 12 overlapping ranges. Doubles as an ohmmeter down to 0.02 ohm. Use to measure current down to 10 mA. Est. cost: $20.
POPULAR ELECTRONICS [1] Apr 1975 (v.7#4) pg. 46

This converter turns a digital frequency counter into a highly accurate digital VOM without modifying the counter. Has four ranges of ac & dc voltage readings (5, 50, 500, 1000) and five ranges of resistance (500 ohms, 5, 50, & 500 kilohms, 5 megohms).
POPULAR ELECTRONICS [1] May 1975 (v.7#5) pg. 27

Calibrator circuit for a VOM allows you to check voltage, current, and resistance scales.
POPULAR ELECTRONICS [1] Jul 1975 (v.8#1) pg. 84

A dual-polarity dc meter circuit. The meter will always go upscale, regardless of the polarity of the leads.
POPULAR ELECTRONICS [1] Nov 1975 (v.8#5) pg. 104

Battery eliminator circuit for 1.5-volt batteries in a VTVM.
POPULAR ELECTRONICS [1] Nov 1975 (v.8#5) pg. 106

Build a high-frequency voltmeter. Measures from dc to frequencies over 20MHz at amplitudes up to 90 volts in five overlapping voltage ranges. Est. cost: $25.
POPULAR ELECTRONICS [1] Jan 1976 (v.9#1) pg. 46

Build the Audio Detective, a sensitive ac voltmeter which is very useful in troubleshooting an audio system. Has four ranges (0.005, 0.05, 0.5, and 5-volts). Meter is battery powered and small in size.
POPULAR ELECTRONICS [1] May 1976 (v.9#5) pg. 41

Update your multimeter with a CMOS millivolter. Convert any voltmeter into a high-sensitivity input meter for low millivolt measurements using this amplifier probe that plugs into the standard input of any voltmeter rated at 1000 ohms (or greater) per volt. Est. cost: $12.
POPULAR ELECTRONICS [1] Jul 1976 (v.10#1) pg. 47

LED bargraph readouts. Measure voltage, resistance and frequency with a row of lights which show trends (direction) better than meters with needles and less expensively than digital readouts. Circuits for several types of meters shown.
POPULAR ELECTRONICS [1] Sep 1976 (v.10#3) pg. 74
Added Info POPULAR ELECTRONICS [1] Oct 1976 (v.10#4) pg. 8

Multimeters for electronics. Part 1. A look at traditional VOM's and analog-type electronic multimeters.
POPULAR ELECTRONICS [1] Jan 1977 (v.11#1) pg. 61

Multimeters for electronics. Part 2. Digital multimeters.
POPULAR ELECTRONICS [1] Feb 1977 (v.11#2) pg. 31

Circuits for a 2.5-digit and 3.5-digit digital voltmeter able to be built by the average experimenter.
POPULAR ELECTRONICS [1] Mar 1978 (v.13#3) pg. 76

Build a 3.5-digit multimeter with either LED or LCD displays, plus a variety of options including a temperature probe. Est. cost: $50.
POPULAR ELECTRONICS [1] Feb 1979 (v.15#2) pg. 63
Added Info POPULAR ELECTRONICS [1] Jul 1979 (v.16#1) pg. 6

Build a true rms voltmeter. Measures effective ac voltage rather than the usual average values. Est. cost: $30-$70.
POPULAR ELECTRONICS [1] Apr 1979 (v.15#4) pg. 35

Buying the right digital multimeter. Understanding the specs, operating charecteristics, and special features of DMMs.
POPULAR ELECTRONICS [1] Feb 1980 (v.17#2) pg. 37

Measuring large currents with a DMM. Use a high-current shunt to measure tens or hundreds of amperes. How to make the shunt.
POPULAR ELECTRONICS [1] Sep 1980 (v.18#3) pg. 90

Single-LED analog meter uses a multicolor LED which changes color in response to input voltage.
POPULAR ELECTRONICS [1] Sep 1981 (v.19#9) pg. 81

Circuit to enable an analog meter to measure ac and dc of either polarity.
POPULAR ELECTRONICS [1] Feb 1982 (v.20#2) pg. 88

Low-ohms adapter. Accurately measure resistances down to 0.01 ohm with this low-cost plug-in adapter for any common digital multimeter.
POPULAR ELECTRONICS [2] Feb 1989 (v.6#2) pg. 36

Audio millivolt meter features a high input impedance which assures that the circuit does not load down the unit under test.
POPULAR ELECTRONICS [2] Apr 1989 (v.6#4) pg. 25

Expanded-scale voltmeter swings from 0 at 10 volts to full scale at 15 volts.
POPULAR ELECTRONICS [2] Aug 1990 (v.7#8) pg. 27

Meter-range extender circuits that increase the sensitivity of an analog current meter. (1) Amplified DC microammeter. (2) Low-voltage voltmeter. (3) Meter-calibration circuit. (4) Low-range ohmmeter.
POPULAR ELECTRONICS [2] Apr 1991 (v.8#4) pg. 77

All about meters. What you need to know to design ammeters, voltmeters, and ohmmeters.
POPULAR ELECTRONICS [2] May 1991 (v.8#5) pg. 28
Added Info POPULAR ELECTRONICS [2] Aug 1991 (v.8#8) pg. 4

Does your meter lie to you? Learn all about the limitations of multimeters.
POPULAR ELECTRONICS [2] Oct 1991 (v.8#10) pg. 36

AC line-to-multimeter adapter can make checking and monitoring line voltage safer.
POPULAR ELECTRONICS [2] Nov 1991 (v.8#11) pg. 18

Turn your personal computer into a digital voltmeter for automated testing, to record readings over time, etc. Est. cost: $25 (kit).
POPULAR ELECTRONICS [2] Nov 1993 (v.10#11) pg. 41

Sample-and-hold circuit makes a reading of an instantaneous voltage and holds that reading for a short period of time.
POPULAR ELECTRONICS [2] Nov 1993 (v.10#11) pg. 73

High-voltage probe extends your DMM meter's range when working with high-voltage (up to 10,000 volts) or high-impedance (up to 100-megohm) circuits.
POPULAR ELECTRONICS [2] Mar 1994 (v.11#3) pg. 89

Audible voltmeter circuit can be used to test for AC or DC voltages (between 4 and 200 volts) in a circuit.
POPULAR ELECTRONICS [2] May 1994 (v.11#5) pg. 79

Expanded resistance ranges for your DMM (digital multimeter). Two simple devices let you take readings on much lower or higher ranges.
POPULAR ELECTRONICS [2] Dec 1995 (v.12#12) pg. 64

Circuit for a negative-peak holding voltmeter will measure cranking voltage while starting an automobile. Handles 4 to 16 volts.
POPULAR ELECTRONICS [2] Jan 1996 (v.13#1) pg. 63

Build a wireless DC volt probe (voltmeter) which eliminates test leads by using your body as part of the signal path.
POPULAR ELECTRONICS [2] Feb 1996 (v.13#2) pg. 33

Using digital panel meters to enhance the look and performance of your next project. Circuits include: (1) AC power supply, (2) DC-to-DC supply, (3) DC ammeter, (4) automobile voltage monitor, (5) digital DC voltmeter, and (6) low-ohms meter.
POPULAR ELECTRONICS [2] Oct 1996 (v.13#10) pg. 39
Correction POPULAR ELECTRONICS [2] Jan 1997 (v.14#1) pg. 6

Op-amp applications. (1) CMOS-interface driver, (2) dual-voltage supply, (3) AC amplifier, (4) adjustable comparator, (5) dual-voltage comparator, (6) four-level voltage detector, and (7) voltage window.
POPULAR ELECTRONICS [2] Oct 1996 (v.13#10) pg. 68

Build an active high-impedance probe to get more accurate readings from your DMM (digital multimeter).
POPULAR ELECTRONICS [2] Nov 1996 (v.13#11) pg. 41

A collection of troubleshooting circuits. (1) Voltage testers. (2) Polarity indicator. (3) Continuity tester. (4) Transformer tester. (5) Meter resistance tester. (6) Intermittently-open circuit tester.
POPULAR ELECTRONICS [2] Aug 1997 (v.14#8) pg. 67

Hot series test box replaces VOM.
POPULAR MECHANICS Mar 1963 (v.119#3) pg. 191

Voltmeter and ammeter circuits to measure voltage and current in ranges of .1, 1, 10 and 100 volts DC 50 microamperes and 1, 10, and 100 milliamperes.
POPULAR MECHANICS Jan 1968 (v.129#1) pg. 144

A review of various test meters which the home repairman can use to test home appliances.
POPULAR MECHANICS Jun 1968 (v.129#6) pg. 164

Build a VOM helper. Make it easier to measure printed circuit board amperage with a VOM meter by means of this simple "helper" board which provides 2 larger attachment points for the meter probes.
POPULAR MECHANICS Jan 1980 (v.153#1) pg. 10

Automobile voltmeter monitors your cars electrical system. Voltage is picked up from cigarette-lighter plug. Voltage is displayed on meter and on three lamps (red, yellow, green). Estimated cost: $17.
POPULAR MECHANICS May 1980 (v.153#5) pg. 42

How to use an ohmmeter (VOM) to test and troubleshoot home appliances.
POPULAR MECHANICS Oct 1987 (v.164#10) pg. 103

Nine-in-one troubleshooter does the work of nine individual test meters by means of one universal meter coupled with six interchangeable test modules. Part 2. Automotive tachometer/dwell meter and multirange volt-ammeter.
POPULAR SCIENCE Mar 1966 (v.188#3) pg. 138

Voltminder. An electronic meter to check the entire electrical system of car or boat.
POPULAR SCIENCE Oct 1969 (v.195#4) pg. 158

How to buy and use a VOM (volt-ohm-milliammeter).
POPULAR SCIENCE Nov 1970 (v.197#5) pg. 110

How to prevent appliance breakdowns. Perform regular checkups of home appliances with a VOM. Table of checkpoints and scale settings to use for testing.
POPULAR SCIENCE Jul 1971 (v.199#1) pg. 86

Using a VOM meter to troubleshoot your car's ignition system.
POPULAR SCIENCE Jun 1972 (v.200#6) pg. 114

Tips on selecting a VOM (volt-ohm-milliammeter) for appliance diagnosis around the house.
POPULAR SCIENCE Oct 1976 (v.209#4) pg. 144

Analog voltmeters. Part 1. A rundown on types available, their features, specification and applications.
RADIO-ELECTRONICS Jan 1977 (v.48#1) pg. 46

Analog voltmeters. Part 2.
RADIO-ELECTRONICS Feb 1977 (v.48#2) pg. 75

Analog voltmeters. Part 3.
RADIO-ELECTRONICS Mar 1977 (v.48#3) pg. 69

Servicing with multimeters. Hints on meter selection and use for electronic servicing.
RADIO-ELECTRONICS Apr 1977 (v.48#4) pg. 67

What you should know about digital multimeters.
RADIO-ELECTRONICS Jul 1977 (v.48#7) pg. 53

Build a 3.5-digit DMM (digital multimeter). Circuit starts out as a DPM (digital panel meter) that is then converted to a digital multimeter through the addition of some voltage-divider and current-shunt circuits. Est. cost: $50.
RADIO-ELECTRONICS Mar 1978 (v.49#3) pg. 40

Selecting a digital multimeter. What you should look for.
RADIO-ELECTRONICS Apr 1978 (v.49#4) pg. 63

LED bar graph universal indicator. Bar graphs are replacing analog meters as voltage-level indicators. Here's how the basic LED bar graph works.
RADIO-ELECTRONICS Jun 1978 (v.49#6) pg. 78

A single IC from National Semiconductor, the LH0091, adds true RMS measurements of voltage to a multimeter.
RADIO-ELECTRONICS Jun 1978 (v.49#6) pg. 92

Build a digital thermometer. Accessory converts a digital voltmeter into a thermometer for monitoring semiconductor case temperatures, photo chemicals, etc. Accuracy of 0.5-degrees over a range of -55 to +150 degrees. Est. cost: $40.
RADIO-ELECTRONICS Aug 1978 (v.49#8) pg. 29

Build an inexpensive expanded-scale voltmeter to monitor ac line voltage.
RADIO-ELECTRONICS Aug 1978 (v.49#8) pg. 66

Audio test station. Part 1. A series of articles describing the operation, design and construction of Fidelity Sound's model 101 Audio Test System kit. The unit consists of a power supply, two sine/square/triangle function generators, pulse generator, frequency counter and AC voltmeter. Est. cost: $650 (kit).
RADIO-ELECTRONICS Jan 1979 (v.50#1) pg. 35

Audio test station. Part 2. Power supply and timebase circuits.
RADIO-ELECTRONICS Feb 1979 (v.50#2) pg. 45

Audio test station. Part 3. Pulse generator, sweep shaper, and audio sweep generator.
RADIO-ELECTRONICS Mar 1979 (v.50#3) pg. 76

Audio test station. Part 4. Theory of operation and the construction of the voltmeter and digital frequency meter sections.
RADIO-ELECTRONICS May 1979 (v.50#5) pg. 59

Audio test station. Part 5. Step-by-step through the calibration process.
RADIO-ELECTRONICS Jul 1979 (v.50#7) pg. 54

Build this 4.5-digit precision digital multimeter. Includes temperature and true-RMS capability. Est. cost: $199.
RADIO-ELECTRONICS Aug 1979 (v.50#8) pg. 37

LED bar-graph display. Eight simple electronic gadgets which use this device, including expanded-scale voltmeters.
RADIO-ELECTRONICS Oct 1979 (v.50#10) pg. 93

Two new IC's from RCA make digital voltmeter design a cinch. Typical circuits shown.
RADIO-ELECTRONICS Dec 1979 (v.50#12) pg. 78

3.5 digit DMM (digital multimeter) to build.
RADIO-ELECTRONICS Apr 1980 (v.51#4) pg. 61

New dot and bar-graph display driver ICs. How they work and typical circuits for audio-level meters, expanded-scale voltmeter, and similar meters.
RADIO-ELECTRONICS Oct 1980 (v.51#10) pg. 96

How to modify the full-scale reading of an existing voltmeter or ammeter.
RADIO-ELECTRONICS Nov 1980 (v.51#11) pg. 82

Add-on accessory for your digital or analog multimeter allows resistance measurements as low as 0.001 ohm. Est. cost: $42.
RADIO-ELECTRONICS Feb 1981 (v.52#2) pg. 68
Added Info RADIO-ELECTRONICS Jun 1981 (v.52#6) pg. 80

Circuit for a simple RF sniffer which is used with a digital voltmeter.
RADIO-ELECTRONICS Sep 1981 (v.52#9) pg. 70

Build an analog voltmeter with a scale equivalent to one 36" long. Features reverse-polarity, over-load protection and a special circuit for AC.
RADIO-ELECTRONICS Nov 1981 (v.52#11) pg. 52

Meter adaptor circuit for a VOM. It increases the meter's input impedance considerable and can be used with meters having sensitivities as low as 1000-ohms-per-volt.
RADIO-ELECTRONICS Jul 1982 (v.53#7) pg. 41

DMM add-on lets you read resistance above the 20 megohm range.
RADIO-ELECTRONICS Oct 1982 (v.53#10) pg. 143
Added Info RADIO-ELECTRONICS May 1983 (v.54#5) pg. 22

Circuit for a "voltage freezer" which reads and stores the voltage (freezes the meter) even after the probes are removed.
RADIO-ELECTRONICS Nov 1982 (v.53#11) pg. 92
Added Info RADIO-ELECTRONICS Mar 1983 (v.54#3) pg. 24

Two compact DVM's (digital voltmeters). Equip your bench power-supply with its own 4-digit digital voltmeter. Est. cost: $25.
RADIO-ELECTRONICS Mar 1983 (v.54#3) pg. 59

Build this digital voltmeter for your car's dashboard. Est. cost: $30.
RADIO-ELECTRONICS Jul 1983 (v.54#7) pg. 59

How to use digital panel meters to measure voltage, current, resistance, capacitance, frequency, temperature, etc. Part 1. Voltage, current and resistance meters.
RADIO-ELECTRONICS Feb 1984 (v.55#2) pg. 67

Making true measurements of RMS values of AC voltages using RMS-to-DC converter IC's.
RADIO-ELECTRONICS Apr 1984 (v.55#4) pg. 98

What's new in DMM's (digital multimeters).
RADIO-ELECTRONICS Mar 1985 (v.56#3) pg. 49

Temperature measuring add-on for your DMM. Use your digital multimeter as a precision digital thermometer.
RADIO-ELECTRONICS Jun 1985 (v.56#6) pg. 39

Bargraph voltmeter for your car. Est. cost: $25.
RADIO-ELECTRONICS Jun 1985 (v.56#6) pg. 60

Purpose and meaning of the "half digit" found on many multimeters.
RADIO-ELECTRONICS Aug 1988 (v.59#8) pg. 11

Simple converter will add true-RMS (root mean square) capability to any VOM or DMM. Est. cost: $20.
RADIO-ELECTRONICS Dec 1988 (v.59#12) pg. 61, 77
Correction RADIO-ELECTRONICS Feb 1989 (v.60#2) pg. 14

Circuit for a basic analog log amp built around a single op-amp. Called a "transdiode" circuit. Used to convert a linear-voltage input into a log-arithmic output to drive a meter.
RADIO-ELECTRONICS Jul 1989 (v.60#7) pg. 10

Op-amps show their versatility in instrumentation circuits. Includes circuits for rectifier, peak detector, AC/DC converter, voltmeter, ammeter, ohmmeter, voltage reference, and power supply.
RADIO-ELECTRONICS Sep 1989 (v.60#9) pg. 59

Circuit for an audio level voltmeter having a range of 0 to -80 dBm. Accepts audio levels as low as ten microvolts. Use it to calibrate microphones and speakers, or as a receiver "S" meter.
RADIO-ELECTRONICS Sep 1990 (v.61#9) pg. 78

Choosing the right test probe for your digital multimeter.
RADIO-ELECTRONICS Dec 1990 (v.61#12) pg. 63

Experimenting with PC-based test equipment. Part 2. Volt/ohmmeter.
RADIO-ELECTRONICS Jun 1991 (v.62#6) pg. 48

Working with LED display drivers. Using the National Semiconductor LM391X and LM2917 series IC's to build moving-dot and bar-graph voltmeters and frequency-to-voltage converters. Part 1. LM3914-series drivers and 7-segment display systems.
RADIO-ELECTRONICS Mar 1992 (v.63#3) pg. 65

Buyer's guide to digital multimeters (DMM's).
RADIO-ELECTRONICS May 1992 (v.63#5) pg. 31

Working with LED display drivers. Part 2. Seven-segment display driving techniques.
RADIO-ELECTRONICS May 1992 (v.63#5) pg. 65

Ohms range expander adds a X100K resistance range to many multimeters (VOMs). Est. cost: $6.
RADIO-TV EXPERIMENTER #789 Jun-Jul 1966 (v.20#3) pg. 37

VTVM dry cell eliminator. A transistorized voltage regulator powered by the low-voltage winding on the VTVM power tranformer. This unit replaces the 1.5-volt cell used in most VTVMs. Est. cost: $3.
RADIO-TV EXPERIMENTER #798 Aug-Sep 1966 (v.21#1) pg. 27

Two-tube audio generator and audio voltmeter.
RADIO-TV EXPERIMENTER #798 Aug-Sep 1966 (v.21#1) pg. 51

An adapter to turn a multimeter into a digital circuit tracer. Est cost: $4.
RADIO-TV EXPERIMENTER #806 Oct-Nov 1966 (v.21#2) pg. 89

Test-lead, polarity-reversing switch for a VOM and VTVM. Est. cost: $2.
RADIO-TV EXPERIMENTER Apr-May 1967 (v.22#2) pg. 78

Troubleshooting your automobile ignition system with a digital multimeter.
SCIENCE & ELECTRONICS [2] Mar-Apr 1981 (v.21#2) pg. 38

Modular test instruments. Part 1. Build your own voltmeter boards and power supply boards which will be incorporated into other instruments.
SPEAKER BUILDER 3/1983 [Oct 1983] (v.4#3) pg. 12
Correction SPEAKER BUILDER 1/1984 [Mar 1984] (v.5#1) pg. 37

Bar graph voltmeter circuit is a cheaper and more practical alternative to buying a digital multimeter.
SPEAKER BUILDER 3/1985 [Aug 1985] (v.6#3) pg. 43

Simple modification converts the Fluke Model 75 multimeter to include all the features of the top-of-the-line Model 77.
SPEAKER BUILDER 2/1990 [Apr 1990] (v.11#2) pg. 50

Low-frequency AC-to-DC converter facilitates the measurement of AC signals with frequencies lower than 20Hz using a digital multimeter.
SPEAKER BUILDER 1/1994 [Jan 1994] (v.15#1) pg. 56
Added Info SPEAKER BUILDER 4/1994 [May 1994] (v.15#4) pg. 50

Converting Radio Shack's sound level meter to also function as a millivolt (mV) testmeter to measure loudspeaker response.
SPEAKER BUILDER 4/1994 [May 1994] (v.15#4) pg. 12
Correction SPEAKER BUILDER 6/1994 [Aug 1994] (v.15#6) pg. 53
Correction SPEAKER BUILDER 5/1995 [Jul 1995] (v.16#5) pg. 68

Using a voltmeter (multimeter, multitester, volt-ohm-meter) to troubleshoot electrical devices.
WORKBENCH Sep-Oct 1987 (v.43#5) pg. 36
Correction WORKBENCH Jan-Feb 1988 (v.44#1) pg. 10