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The entries are in alphabetical order by magazine name and then in chronological sequence.
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The tape-tweaker's pal. Instrument for aligning a tape recorder has three sections (variable-frequency oscillator, spot-frequency oscillator, and a spot THD analyzer). Also useful for checking frequency response and midband distortion on any piece of audio gear. Part 1.
AUDIO AMATEUR 5/1982 [Jan 1983] (v.13#5) pg. 13

The tape-tweaker's Pal. Part 2. Performance specs, an essay on tweaking, and construction details.
AUDIO AMATEUR 1/1983 [Apr 1983] (v.14#1) pg. 24
Added Info AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 55

A voltage-controlled resistance for Wien bridge oscillators.
AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 16

A tape calibration oscillator. Adjust the bias and record level of a three-head (or two-head) cassette recorder using this dual frequency calibration oscillator (a conventional Wein bridge oscillator using a dual op amp integrated circuit).
AUDIO AMATEUR 2/1989 [Apr 1989] (v.20#2) pg. 23

A tone-burst oscillator adjunct. A battery-powered tone-burst converter for an audio oscillator.
AUDIO ELECTRONICS 1/1997 [Feb 1997] (v.28#1) pg. 8

Precision sine-wave oscillator. Build an integrated high-quality low-distortion sine-wave oscillator for the Hewlett-Packard HP-334A Distortion Analyzer in order to test audio circuits.
AUDIO ELECTRONICS 5/1998 [Oct 1998] (v.29#5) pg. 8
Added Info AUDIO ELECTRONICS 6/1998 [Dec 1998] (v.29#6) pg. 42
Added Info AUDIO ELECTRONICS 1/1999 [Jan 1999] (v.30#1) pg. 49
Added Info AUDIO ELECTRONICS 2/1999 [Mar 1999] (v.30#2) pg. 46, 47
Added Info AUDIO ELECTRONICS 4/1999 [Aug 1999] (v.30#4) pg. 47

A filtered audio oscillator. Build a different type of audio oscillator that generates a variable frequency square wave and then filters it so that only the first-harmonic sine wave remains.
AUDIO ELECTRONICS 4/1999 [Aug 1999] (v.30#4) pg. 8
Correction AUDIOXPRESS May 2002 (v.33#5) pg. 67

Multivibrator circuit made with a pair of VMOS MOSFETs. An adjustable rate dual LED flasher with enable input which uses the multivibrator is also shown.
COMPUTERS & ELECTRONICS Jan 1983 (v.21#1) pg. 113

This voltage-controlled oscillator circuit with RAMs will synthesize any waveshape you can imagine without using complex filters.
COMPUTERS & ELECTRONICS Jul 1983 (v.21#7) pg. 67

Test circuit will allow anyone to closely match R or C components. It also serves as a test oscillator and secondary R or C measuring circuit.
CQ. THE RADIO AMATEUR'S JOURNAL Feb 1980 (v.36#2) pg. 65

The practical aspects of VFO (variable-frequency oscillator) design plus how to build one.
CQ. THE RADIO AMATEUR'S JOURNAL Jun 1991 (v.47#6) pg. 16

VFO interfacing. Using solid-state VFOs (variable-frequency oscillators) to drive vacuum-tube transmitters.
CQ. THE RADIO AMATEUR'S JOURNAL Sep 1991 (v.47#9) pg. 54

The Vackar high-stability L-C oscillator. Built as a shielded modular unit for a HF amateur-band receiver.
CQ. THE RADIO AMATEUR'S JOURNAL Jun 1994 (v.50#6) pg. 26

Schematic for a minimum component, ultra-simple crystal oscillator which uses the HA7210 8-pin IC.
CQ. THE RADIO AMATEUR'S JOURNAL Mar 1995 (v.51#3) pg. 104

Simple design tip tells how to get any frequency desired out of an oscillator circuit.
ELECTRONICS ILLUSTRATED Mar 1965 (v.8#2) pg. 92

Neon lamps, their theory and some simple applications in oscillator and multivibrator circuits.
ELECTRONICS ILLUSTRATED Sep 1966 (v.9#5) pg. 41

The 555. A versatile monolithic timer/oscillator integrated circuit. Part 1. Learn to use the 555 and 556 timer IC in practical circuits to obtain accurate time delays and square waves.
ELECTRONICS NOW Sep 1992 (v.63#9) pg. 58

The 555. A versatile monolithic timer/oscillator integrated circuit. Part 2. Self-triggering oscillator circuits. Build circuits that generate a variety of square or rectangular waveforms, wail like sirens, etc.
ELECTRONICS NOW Oct 1992 (v.63#10) pg. 69
Added Info ELECTRONICS NOW Feb 1993 (v.64#2) pg. 16

The 555. A versatile monolithic timer/oscillator integrated circuit. Part 3. Using in a Schmitt trigger, or as the heart of light and temperature alarms and drivers, a metronome, and a continuity tester.
ELECTRONICS NOW Nov 1992 (v.63#11) pg. 61

Simple crystal oscillator circuit uses an extra gate found on a 4049 inverting hex buffer IC.
ELECTRONICS NOW Dec 1992 (v.63#12) pg. 12

The 555. A versatile monolithic timer/oscillator integrated circuit. Part 4. Sawtooth generator, ramp generator, time-base generator, frequency meter, tachometer for a car, etc.
ELECTRONICS NOW Dec 1992 (v.63#12) pg. 62

Crystal oscillators. Learn the fundamentals of crystal resonators. How and why they work in oscillators and frequency standards. Part 1. Resonators based on the piezoelectric effect.
ELECTRONICS NOW Jan 1993 (v.64#1) pg. 45

Crystal oscillators. Part 2. Fundamentals of all transistorized oscillator circuits.
ELECTRONICS NOW Feb 1993 (v.64#2) pg. 47
Correction ELECTRONICS NOW Apr 1993 (v.64#4) pg. 93

How to get a 50% duty cycle by carefully choosing the components in a 555 oscillator circuit.
ELECTRONICS NOW May 1993 (v.64#5) pg. 12
Added Info ELECTRONICS NOW Sep 1993 (v.64#9) pg. 14
Added Info ELECTRONICS NOW Dec 1993 (v.64#12) pg. 16

Oscillators. Learn about transistor oscillators and multivibrators that generate useful sine and square waves.
ELECTRONICS NOW Dec 1993 (v.64#12) pg. 48

Wave shaping. Learn the basics of waveform generation and shaping with bipolar transistor circuits that you can build. Includes circuits for multivibrators, schmitt trigger, pulse generator, etc.
ELECTRONICS NOW Jan 1994 (v.65#1) pg. 70

Waveform generator circuits. Learn about Wien-bridge and twin-T oscillator circuits. Putting them to work in your circuit designs.
ELECTRONICS NOW Dec 1995 (v.66#12) pg. 35

Oscillator circuit which imitates the sound of a heartbeat.
ELECTRONICS NOW Jan 1997 (v.68#1) pg. 12

Using the Signetics NE602 (a monolithic IC containing a double-balanced mixer and an internal oscillator circuit designed for radio frequency use).
ELECTRONICS NOW Feb 1997 (v.68#2) pg. 47

Modern version of the classic Hewlett-Packard Model 200 audio oscillator.
ELECTRONICS NOW Mar 1997 (v.68#3) pg. 11
Added Info ELECTRONICS NOW May 1997 (v.68#5) pg. 75

Circuit for a super-slow oscillator which produces a squarewave with a period of 30 days (one cycle per 30 days).
ELECTRONICS NOW Nov 1998 (v.69#11) pg. 6
Added Info ELECTRONICS NOW May 1999 (v.70#5) pg. 3

Oscillator circuit with an output frequency that falls from 500 Hz to 0 Hz and reaches a steady +5 volts after several seconds.
ELECTRONICS NOW Jun 1999 (v.70#6) pg. 3
Added Info ELECTRONICS NOW Oct 1999 (v.70#10) pg. 18 (Alternative circuit)

Cheap, precise 0.5-Hz oscillator. Schmitt-trigger circuit that converts a standard analog quartz clock circuit into a digital time base.
ELECTRONICS NOW Jun 1999 (v.70#6) pg. 4

Audio gets easier. Using the new LM4862 audio amplifier chip. Several amplifier and oscillator circuits shown.
ELECTRONICS NOW Nov 1999 (v.70#11) pg. 39

Improving the low-frequency transistor multivibrator.
ELECTRONICS WORLD Feb 1966 (v.75#2) pg. 83

Multivibrator uses unijunction transistors to produce excellent square waves without the aid of other semiconductors.
ELECTRONICS WORLD Feb 1969 (v.81#2) pg. 45

Mono-cycle multivibrator circuit uses unijunction transistors.
ELECTRONICS WORLD Apr 1969 (v.81#4) pg. 61

FET sine-wave crystal oscillator circuits produce linear sine-wave output with low harmonics.
ELECTRONICS WORLD Jun 1969 (v.81#6) pg. 33

Silicon-controlled switch crystal-controlled oscillator operates at 100 KHz.
ELECTRONICS WORLD Oct 1969 (v.82#4) pg. 74

Monostable multivibrator with very low idling current that can be built with one semiconductor.
ELECTRONICS WORLD Dec 1969 (v.82#6) pg. 74

Silicon controlled switch multivibrator.
ELECTRONICS WORLD Jun 1970 (v.83#6) pg. 60

Waveshaping with logic gates. Schmitt triggers and monostable multivibrators can be made from IC "nand" gates.
ELECTRONICS WORLD Apr 1971 (v.85#4) pg. 38

Relaxation oscillators. A collection of tried and tested circuits using various types of solid-state switches that can be employed for pulse generation.
ELECTRONICS WORLD May 1971 (v.85#5) pg. 36

Step-by-step designing of a versatile sine-wave audio oscillator.
ELECTRONICS WORLD Jul 1971 (v.86#1) pg. 34

An encapsilated oscillator forms an intriguing, blinking, do-nothing circuit. Topped with a desk pen, it forms a unique desk ornament. Est. cost $11.
ELEMENTARY ELECTRONICS #763 Winter 1965 pg. 100

Explanation of Y-type and Z-type oscillators, some practical experiments with them, and their relationship to the Hartley and Colpitts circuits.
ELEMENTARY ELECTRONICS May-Jun 1966 (v.2#2) pg. 59

Multivibrator circuits and how they work.
ELEMENTARY ELECTRONICS May-Jun 1969 (v.8#2) pg. 95

Circuit for a basic 1000-Hz oscillator is suitable for testing audio equipment, signal tracing, or tape recorder bias adjustments. Uses a 741-type op-amp in the circuit.
ELEMENTARY ELECTRONICS May-Jun 1975 (v.15#3) pg. 84

Circuit for a Pierce crystal oscillator which can be the clock for a microprocessor, digital timepiece or a calculator.
ELEMENTARY ELECTRONICS Sep-Oct 1978 (v.18#5) pg. 69

Oscar, an inexpensive audio oscillator with a frequency range from 30-Hz up to 25-kHz. Estimated cost: $20.
ELEMENTARY ELECTRONICS Sep-Oct 1980 (v.20#5) pg. 59

Circuit for a two-transistor astable multivibrator.
HANDS-ON ELECTRONICS Nov-Dec 1985 (v.2#6) pg. 5

Circuit for a flip-flop configured as a monostable multivibrator.
HANDS-ON ELECTRONICS Mar-Apr 1986 (v.3#2) pg. 95

CMOS phase-locked loops. Part 2. Practical applications of PLL circuits. Circuits include (1) frequency meter upconverter, (2) frequency-to-voltage converter, (3) frequency synthesis, (4) double sync oscillator, (5) adjustable tone detector, and (6) FM demodulator.
HANDS-ON ELECTRONICS Jan 1987 (v.4#1) pg. 79

Astable multivibrator. A demonstration circuit using LEDs shows how astable multivibrators work.
HANDS-ON ELECTRONICS Jan 1987 (v.4#1) pg. 105

Electro-mechanical circuit can amplify or oscillate without the aid of vacuum tube or solid-state device. Circuit for a two-stage amplifier also shown.
HANDS-ON ELECTRONICS May 1987 (v.4#5) pg. 92

Emitter-coupled oscillator is a handy circuit when an audio- or radio-frequency signal is needed for testing purposes.
HANDS-ON ELECTRONICS May 1987 (v.4#5) pg. 93

All about timer IC's. Experiments to explain the operation of the 555 timer IC and build useful circuits using the 555 timer. Circuits include astable and monostable multivibrators.
HANDS-ON ELECTRONICS Sep 1987 (v.4#9) pg. 81

Rubber Crystal Oscillator combines the best features of a stable crystal oscillator and a tunable Colpitts.
HANDS-ON ELECTRONICS Sep 1988 (v.5#9) pg. 44

Practical op-amp experiments. (1) Wein bridge oscillator. (2) Phase shift oscillator.
INDUSTRIAL EDUCATION Nov 1980 (v.69#8) pg. 56, 58

Practical op-amp experiments. Twin-T oscillator.
INDUSTRIAL EDUCATION Dec 1980 (v.69#9) pg. 30

Practical op-amp experiments. (1) The astable multivibrator. (2) The monostable multivibrator.
INDUSTRIAL EDUCATION Feb 1981 (v.70#2) pg. 32

Schematic of a simple oscillator (transmitter) which is useful in teaching resonance, capacitance, inductance, semiconductors, blocking circuits, etc.
INDUSTRIAL EDUCATION Sep 1982 (v.71#6) pg. 18

Circuit for a low power 1-Hz oscillator (square-wave source).
MODERN ELECTRONICS [2] May 1985 (v.1#8) pg. 67

A multi-function oscillator circuit uses two transistors. Applications include a code-practice oscillator, lamp and LED flashers, audio oscillator, dc-to-dc upconverter, relay control, and pulse generator.
MODERN ELECTRONICS [2] Jul 1985 (v.2#1) pg. 62

Relaxtion oscillators. Looks at electronic relaxation oscillators, basic relaxation oscillators, neon-lamp oscillator, four-layer diode oscillator, SCR oscillator, UJT oscillator, avalanche transistor oscillator, optoelectric oscillator, and software oscillators.
MODERN ELECTRONICS [2] Jul 1986 (v.3#7) pg. 59

Surface-mount-device circuits: A design and construction guide. Projects include using SMCs (surface-mountable components) to produce a subminiature LED tone transmitter, A/D converter LED bargraph or metering circuit, and light-sensitive oscillator (probe).
MODERN ELECTRONICS [2] Feb 1987 (v.4#2) pg. 40

A primer on designing sine-wave audio oscillators.
MODERN ELECTRONICS [2] Jun 1990 (v.7#6) pg. 49
Correction MODERN ELECTRONICS [2] Sep 1990 (v.7#9) pg. 7

Experimenting with surplus goodies. Ideas for elapsed-time indicators, electroluminescent panels, 60-Hz oscillator module, and chart recorder.
MODERN ELECTRONICS [2] Dec 1990 (v.7#12) pg. 48

Experimenting with crystal oscillators. Circuits include (1) unijunction-transistor oscillator, (2) CMOS crystal oscillator, (3) clock-generator, (4) 60-Hz timebase generator, (5) LED driver, (6) 1-Hz timebase, (7) r-f marker transmitter, and (8) 2-to-9-kHz frequency synthesizer.
MODERN ELECTRONICS [2] Jan 1991 (v.8#1) pg. 56

Transistorized BFO circuit.
POPULAR ELECTRONICS [1] Jan 1964 (v.20#1) pg. 70

Four-way transistor oscillator produces square waves and other patterns.
POPULAR ELECTRONICS [1] Feb 1964 (v.20#2) pg. 59

Modern VFO's incorporate Clapp circuit schematic.
POPULAR ELECTRONICS [1] Mar 1964 (v.20#3) pg. 61

ECO oscillator circuit.
POPULAR ELECTRONICS [1] Mar 1964 (v.20#3) pg. 67

One-transistor phono oscillator circuit.
POPULAR ELECTRONICS [1] Mar 1964 (v.20#3) pg. 74

Simple light-powered oscillator goes from 500 cycles to 2,000 cycles.
POPULAR ELECTRONICS [1] Apr 1964 (v.20#4) pg. 43

Light-powered oscillator uses silicon cells.
POPULAR ELECTRONICS [1] Apr 1964 (v.20#4) pg. 43

Phase shift audio oscillator used as a CPO or fixed frequency tone source.
POPULAR ELECTRONICS [1] Apr 1964 (v.20#4) pg. 70

Light-sensitive audio oscillator circuit.
POPULAR ELECTRONICS [1] May 1964 (v.20#5) pg. 89

Transistor light-sensitive audio oscillator circuit.
POPULAR ELECTRONICS [1] Jul 1964 (v.21#1) pg. 65

Multivibrator circuit acts as audio or RF source.
POPULAR ELECTRONICS [1] Sep 1964 (v.21#3) pg. 78

Relaxation oscillator employing light-coupling and only three components.
POPULAR ELECTRONICS [1] Feb 1965 (v.22#2) pg. 68

Crystal-controlled oscillator is rich in harmonic output and can be used to calibrate and check alignment of multi-band receivers, transmitters and signal generators.
POPULAR ELECTRONICS [1] Mar 1965 (v.22#3) pg. 73

Circuit for a blocking oscillator using standard parts.
POPULAR ELECTRONICS [1] Oct 1965 (v.23#4) pg. 58

Test oscillator circuit uses one transistor.
POPULAR ELECTRONICS [1] Nov 1965 (v.23#5) pg. 77

General-purpose audio oscillator circuit no bigger than a thimble. Powered by 1.5 to 6 volts.
POPULAR ELECTRONICS [1] May 1966 (v.24#5) pg. 82

Multi-master. Solid-state multivibrator module is used in this tester which generates a 1000-Hz tone, richly endowed with harmonics. Can be used as a signal generator, code practice oscillator, and continuity tester. Est. cost: $5.
POPULAR ELECTRONICS [1] Jan 1967 (v.26#1) pg. 75

Circuit for a wide range oscillator suitable for use from 1 to 25 MHz.
POPULAR ELECTRONICS [1] Mar 1968 (v.28#3) pg. 85

Megahertz oscillator uses unijunction transistors.
POPULAR ELECTRONICS [1] Apr 1968 (v.28#4) pg. 66

Circuit for an audio oscillator which will deliver a 2 KHz signal.
POPULAR ELECTRONICS [1] Oct 1968 (v.29#4) pg. 86

Basic blocking oscillator circuit can serve as (1) code practice oscillator, (2) continuity tester, (3) metronome, (4) audio test signal source, (5) alarm signal and (6) basic electronic organ.
POPULAR ELECTRONICS [1] Jan 1970 (v.32#1) pg. 99

A 100 MHz FET oscillator circuit.
POPULAR ELECTRONICS [1] Mar 1970 (v.32#3) pg. 98

Low-voltage oscillator circuit.
POPULAR ELECTRONICS [1] May 1970 (v.32#5) pg. 95

Circuit where switching arrangement allows wide-range relaxation oscillator to operate as (1) electronic organ, (2) metronome, (3) thermometer, (4) code practice oscillator, or (5) siren.
POPULAR ELECTRONICS [1] Jun 1970 (v.32#6) pg. 80

Three circuits all use light-emitting diodes. (1) Relaxation oscillator blinker, (2) dual blinker, and (3) polarity reversal alarm.
POPULAR ELECTRONICS [1] Oct 1970 (v.33#4) pg. 101

Two UJT relaxation oscillator circuits.
POPULAR ELECTRONICS [1] Feb 1971 (v.34#2) pg. 86

Three flip-flop acting circuits are actually multivibrator circuits using IC op amps.
POPULAR ELECTRONICS [1] Jul 1972 (v.2#1) pg. 58

Crystal oscillator circuit can be used as a BCB i-f aligner with harmonics usable across the whole broadcast band.
POPULAR ELECTRONICS [1] Jan 1974 (v.5#1) pg. 68

Applications for the 555 integrated circuit timer chip described in the Nov 1973 issue (p.54). Applications include: (1) Warble alarm circuit, (2) Schmitt trigger or bistable buffer, (3) Square wave oscillator, (4) Output drive considerations, (5) Wide-range pulse generator.
POPULAR ELECTRONICS [1] Jan 1974 (v.5#1) pg. 72

Circuit to control a UJT oscillator with a crystal.
POPULAR ELECTRONICS [1] Mar 1974 (v.5#3) pg. 24

General-purpose audio oscillator can serve as (1) a code-practice oscillator, (2) self-contained audio source for testing microphones and loudspeaker placement or (3) as a signal in an alarm system.
POPULAR ELECTRONICS [1] Sep 1974 (v.6#3) pg. 81

A look at the voltage comparator and its use in logic control and instrumentation equipment. Application circuits for a reference supply, a 100-kHz multivibrator and oscillator, and a voltage controlled oscillator.
POPULAR ELECTRONICS [1] Jun 1975 (v.7#6) pg. 63

How to design solid-state oscillators, an easy-to-follow approach.
POPULAR ELECTRONICS [1] Oct 1975 (v.8#4) pg. 61

Adjustable pulse oscillator circuit requires only 2 transistors, yet provides 9 octaves of frequency coverage with a single control. Use in clocks, timers, metronomes, oscillators, etc.
POPULAR ELECTRONICS [1] May 1976 (v.9#5) pg. 80

The LM380 power amplifier integrated circuit. Has a very low output impedance and can be directly connected to an 8-ohm speaker. Can operate up to 3.7 watts with heat sink. Circuits for amplifier, intercom and phase-shift oscillator shown.
POPULAR ELECTRONICS [1] Sep 1976 (v.10#3) pg. 121

Circuit for a symmetrical multivibrator with a moderate output current capability uses the 555 timer.
POPULAR ELECTRONICS [1] Jan 1977 (v.11#1) pg. 93

Uses for the multiple integrated circuit LM339, a quad comparator. Containing four independent voltage comparators, it is used in circuits for (1) a voltage-controlled oscillator, (2) limit comparator and (3) limit comparator operated as a programmable light meter.
POPULAR ELECTRONICS [1] Jan 1977 (v.11#1) pg. 94

Build the V-4 voltage-controlled oscillator for electronic music. Features sine, triangle, square-wave and pulse outputs.
POPULAR ELECTRONICS [1] Mar 1977 (v.11#3) pg. 42

Getting acquainted with CMOS IC's which require very little current to operate. A look at a CMOS astable multivibrator and a CMOS divide-by-ten counter/decoder circuit.
POPULAR ELECTRONICS [1] Apr 1978 (v.13#4) pg. 84

The monostable multivibrator. How they work and typical circuits.
POPULAR ELECTRONICS [1] May 1978 (v.13#5) pg. 76

A review of versatile multifunction ICs, including Intersil's 8038 waveform generator, and National's LH0094 multifunction converter. Includes circuits for tone-burst generator, audio oscillator, precision multiplier and divider circuits.
POPULAR ELECTRONICS [1] Jan 1979 (v.15#1) pg. 77

Using the 555 timer IC in interval timer circuits and monostable multivibrators or "one-shots".
POPULAR ELECTRONICS [1] Aug 1979 (v.16#2) pg. 60

A monostable catalog for experimenters. A guide to IC monostable multivibrators which emphasizes their usefulness in practical applications.
POPULAR ELECTRONICS [1] Sep 1979 (v.16#3) pg. 69

A description and typical applications of the LM339 quad comparator integrated circuit chip, including analog-to-digital interface, CMOS to TTL translation, and monostable oscillator.
POPULAR ELECTRONICS [1] Jan 1980 (v.17#1) pg. 67

Circuit for a simple voltage-controlled oscillator.
POPULAR ELECTRONICS [1] Jan 1982 (v.20#1) pg. 81

Experimenting with piezoelectric devices. Part 2. Piezo-alerters and crystal oscillators.
POPULAR ELECTRONICS [1] Aug 1982 (v.20#8) pg. 80

Simple VFO (variable frequency oscillator) circuit can be used for audible-tone testing, driving someone nuts, or a simple electronic musical instrument.
POPULAR ELECTRONICS [2] May 1989 (v.6#5) pg. 86

Learn about and build a Wien-bridge oscillator to generate high-quality sinewaves for your projects and experiments.
POPULAR ELECTRONICS [2] Jul 1989 (v.6#7) pg. 44

Free-running, astable-multivibrator (oscillator) circuit with three different outputs. Built around a 4047 CMOS device.
POPULAR ELECTRONICS [2] Sep 1989 (v.6#9) pg. 88

Simple voltage-controlled oscillator (VCO) circuit uses a 555 oscillator/timer to provide a square-wave output that varies inversely with the input voltage.
POPULAR ELECTRONICS [2] Oct 1989 (v.6#10) pg. 105

Astable multivibrators (oscillators). (1) Three-transistor circuit for audio and low RF frequencies. (2) One-transistor circuit for higher frequencies. (3) Low-frequency audio-tone generator circuit. (4) Wien-bridge oscillator circuit. (5) Sinusoidal oscillator circuit.
POPULAR ELECTRONICS [2] Jan 1990 (v.7#1) pg. 84

Digital electronics course. 555 monostable multivibrator (oscillator/timer). Explore a device capable of generating clock pulses or time delays whose frequency or duration is determined by an external RC network, and is independent of the supply voltage.
POPULAR ELECTRONICS [2] Mar 1990 (v.7#3) pg. 75

Tone-burst oscillator circuit. Use it to drive a piezo element, modulate an FM transmitter, etc.
POPULAR ELECTRONICS [2] Apr 1990 (v.7#4) pg. 27

Digital electronics course. Light-controlled monostable applications. Combining the basic monostable multivibrator with a light-controlled comparator.
POPULAR ELECTRONICS [2] Apr 1990 (v.7#4) pg. 77

Digital electronics course. 555 oscillator circuits. Generating fixed-frequency pulses for use as timing signals in digital circuits.
POPULAR ELECTRONICS [2] May 1990 (v.7#5) pg. 76

Cookbook of signal generator circuits (oscillators) that you can build. (1) Colpitts crystal oscillator. (2) VHF/UHF buffer amplifier. (3) 455 kHz-IF test/alignment oscillator. (4) AM-band oscillator. (5) Voltage-tuned oscillator.
POPULAR ELECTRONICS [2] Nov 1990 (v.7#11) pg. 67

Oscillator round-up. (1) TTL crystal oscillator circuit. (2) Two-transistor crystal oscillator circuit. (3) Simple two-transistor metal detector circuit.
POPULAR ELECTRONICS [2] Mar 1991 (v.8#3) pg. 88

All about sinewave oscillator design and typical applications. Circuits include a phase-shift oscillator, Wien-bridge oscillator, and Colpitts oscillator.
POPULAR ELECTRONICS [2] Aug 1991 (v.8#8) pg. 59
Added Info POPULAR ELECTRONICS [2] Nov 1991 (v.8#11) pg. 3

Simple voltage-controlled audio oscillator circuit.
POPULAR ELECTRONICS [2] Sep 1991 (v.8#9) pg. 74

Supercharging a 555 timer IC. Exploring the built-in voltage-controlled oscillator function.
POPULAR ELECTRONICS [2] Oct 1991 (v.8#10) pg. 22

Quick oscillator circuits. (1) 1-kHz oscillator for testing audio equipment. (2) 100-kHz or 1-MHz for testing RF receiver.
POPULAR ELECTRONICS [2] Nov 1991 (v.8#11) pg. 21

Two squarewave oscillator circuits.
POPULAR ELECTRONICS [2] Jul 1992 (v.9#7) pg. 71

The 558 quad monostable timer. An introduction to this improved version of the venerable 555 and 556 oscillator/timer ICs. Part 1.
POPULAR ELECTRONICS [2] Sep 1992 (v.9#9) pg. 73

The 558 quad monostable timer. Part 2.
POPULAR ELECTRONICS [2] Oct 1992 (v.9#10) pg. 72

The 558 quad monostable timer. Part 3.
POPULAR ELECTRONICS [2] Nov 1992 (v.9#11) pg. 75

Motorola MC14538 dual, precision, retriggerable monostable multivibrator applications. (1) Extended on-time timer circuit. (2) No-doze alarm circuit requires pressing reset button every 50 seconds. (3) Self-retriggering timed-on generator circuit. (4) Lamp-switching circuit to provide a delay turn-off function.
POPULAR ELECTRONICS [2] Dec 1992 (v.9#12) pg. 68

Unijunction transistor (UJT) circuits. (1) Relaxation oscillators. (2) Constant-current relaxation oscillator. (3) Improved-linearity relaxation oscillator. (4) 1- to 30-second time-delay. (5) RF snooper.
POPULAR ELECTRONICS [2] Jan 1993 (v.10#1) pg. 70

How to use the popular 555 timer IC in practical monostable multivibrator circuits. (1) Fixed-period timer. (2) Relay drivers. (3) Pulse generator. (4) 1-kHz linear-scale analog frequency meter.
POPULAR ELECTRONICS [2] Mar 1993 (v.10#3) pg. 53

Using the 555 timer IC in practical astable oscillator circuits.
POPULAR ELECTRONICS [2] Apr 1993 (v.10#4) pg. 55

Circuits based on the LM3909 oscillator/flasher IC. (1) Dual LED driver. (2) Tick circuit flashes an LED and gives out a sharp tick on a speaker. (3) Variable audio-frequency oscillator. (4) Electronic siren. (5) Code-practice oscillator. (6) AC lamp flasher.
POPULAR ELECTRONICS [2] May 1993 (v.10#5) pg. 70

An introduction to magnetically operated, solid-state Hall-effect switch circuits. (1) Simple switch. (2) Latching circuit. (3) Hall-effect oscillator. (4) RC oscillator.
POPULAR ELECTRONICS [2] Jul 1993 (v.10#7) pg. 73

Design and build a ham-band variable frequency oscillator (VFO). Use it to control the frequency of transmitters, as the local oscillator that tunes a radio receiver, or as a signal generator to perform tests and measurements on radio equipment. Part 1.
POPULAR ELECTRONICS [2] Jul 1993 (v.10#7) pg. 79

Design and build a ham-band variable frequency oscillator (VFO). Part 2.
POPULAR ELECTRONICS [2] Aug 1993 (v.10#8) pg. 78

Oscillator circuits based on the 4093 CMOS quad 2-input NAND Schmitt trigger. (1) Astable oscillator. (2) Variable-frequency oscillator. (3) Sinewave oscillator. (4) Oscillator range switch.
POPULAR ELECTRONICS [2] Dec 1993 (v.10#12) pg. 68

Collection of 555 oscillator/timer circuits. (1) Astable multivibrator. (2) Modified astable. (3) Add-on LED dual-flasher circuit. (4) Add-on high-power dual-lamp flasher circuit. (5) DC-to-DC converter. (6) Dual-tone generator.
POPULAR ELECTRONICS [2] Jan 1994 (v.11#1) pg. 72

Oscillator circuits. (1) Unusual 100-kHz oscillator built around a unijunction transistor. (2) FET-based oscillator can be made to oscillate from 1 to 10 MHz. (3) TTL oscillator operates up to 10 MHz. (4) Variable crystal oscillator operates from 2 MHz to 10 MHz. (5) Double-balanced mixer oscillator operates to a maximum of 200 MHz. (6) Very low frequency oscillator works to 50 kHz. (7) LC oscillator resonates at 500 kHz.
POPULAR ELECTRONICS [2] Feb 1994 (v.11#2) pg. 80

More oscillator circuits. (1) Variable-frequency oscillator. (2) Wien-bridge audio-sinewave oscillator.
POPULAR ELECTRONICS [2] Mar 1994 (v.11#3) pg. 82

Oscillator circuit produces a 2-volt peak-to-peak triangular waveform.
POPULAR ELECTRONICS [2] May 1994 (v.11#5) pg. 90

Variable-frequency RF oscillators. Several designs shown (Hartley, Colpitts, Clapp, etc.).
POPULAR ELECTRONICS [2] Oct 1994 (v.11#10) pg. 41

Circuit for a TTL-based audio oscillator outputs an audible frequency.
POPULAR ELECTRONICS [2] Nov 1994 (v.11#11) pg. 31

Building stable RF oscillators. Learn how to ensure the stability of your signal-generating circuits with these easy-to-apply design techniques.
POPULAR ELECTRONICS [2] Nov 1994 (v.11#11) pg. 40

Introduction to building superhet and direct-conversion ham radio receivers, frequency converters and other circuits using the Signetics NE-602 integrated circuit. Part 3. Local-oscillator circuits.
POPULAR ELECTRONICS [2] Jun 1995 (v.12#6) pg. 83

All about crystal-oscillator circuits. An assortment of precision oscillators for you to build.
POPULAR ELECTRONICS [2] Aug 1995 (v.12#8) pg. 61

An overview of basic oscillator circuits. Looks at both early designs and those that use transistors and logic gates. (1) Spark-gap. (2) Hartley. (3) Pierce crystal-controlled. (4) Colpits. (5) TTLs. (6) CMOS. (7) Unijunction transistor. (8) Audio feedback.
POPULAR ELECTRONICS [2] Jun 1997 (v.14#6) pg. 63

An overview of basic oscillator circuits using ICs. (1) Voltage-controlled. (2) Phase locked loop. (3) Waveform generator. (4) Multivibrator. (5) LED flasher/oscillator. (6) Double balanced mixer.
POPULAR ELECTRONICS [2] Jul 1997 (v.14#7) pg. 68

Relaxation oscillator circuit uses an optoisolator as the negative-resistance component.
POPULAR ELECTRONICS [2] Sep 1997 (v.14#9) pg. 74

Simple tremolo oscillator circuit generates a trembling or vibrating effect.
POPULAR ELECTRONICS [2] Oct 1997 (v.14#10) pg. 71

Experimenting with the 4093 NAND Schmitt trigger. Circuits include oscillator, signal injector, fluorescent-light inverter, fluorescent flasher, Morse code sender, beep-tone generator, LED flasher, and timer.
POPULAR ELECTRONICS [2] Feb 1998 (v.15#2) pg. 50

Oscillator circuit to generate square-waves in the audio range.
POPULAR ELECTRONICS [2] Feb 1998 (v.15#2) pg. 68

Tone-ringing generator (ringing oscillator) circuit for applications requiring a voltage level-sensing alarm indication.
POPULAR ELECTRONICS [2] Apr 1999 (v.16#4) pg. 55

Neon-lamp circuits. (1) Sawtooth generator. (2) Free-running oscillator. (3) Latching circuit. (4) Dual-lamp latching circuit. (5) CMOS driver. (6) Sequential driver. (7) Breakdown-voltage matching circuit.
POPULAR ELECTRONICS [2] Nov 1999 (v.16#11) pg. 81

All about audio oscillators. Part 1. Articles look at the sophisticated lab-grade type.
RADIO-ELECTRONICS Apr 1978 (v.49#4) pg. 72

All about audio oscillators. Part 2.
RADIO-ELECTRONICS Jun 1978 (v.49#6) pg. 80

All about audio oscillators. Part 3.
RADIO-ELECTRONICS Jul 1978 (v.49#7) pg. 42

An easy-to-build crystal oscillator that is a must for your workbench. Works with fundamental crystals from 100 kHz to 17 MHz. Has a rich harmonic output for a one-transistor circuit.
RADIO-ELECTRONICS Jul 1978 (v.49#7) pg. 66

All about audio oscillator applications. How the audio generator is used in nine important test procedures.
RADIO-ELECTRONICS Dec 1979 (v.50#12) pg. 66

Circuit for a relay multivibrator.
RADIO-ELECTRONICS Apr 1980 (v.51#4) pg. 77

Several circuits for a small audio oscillator to be built into an existing device.
RADIO-ELECTRONICS Oct 1982 (v.53#10) pg. 144
Added Info RADIO-ELECTRONICS Nov 1982 (v.53#11) pg. 94

How to design analog circuits. How to use feedback.
RADIO-ELECTRONICS Jul 1983 (v.54#7) pg. 68

Inverting logic oscillators.
RADIO-ELECTRONICS Oct 1984 (v.55#10) pg. 97

555 design program. Use your computer to shortcut those tedious 555 monostable and astable oscillator circuit design problems. Written in BASIC.
RADIO-ELECTRONICS Jan 1986 (v.57#1) pg. 8 (ComputerDigest)

Designing with digital IC's. Part 8. One-shots (monostable multivibrators) and clocks.
RADIO-ELECTRONICS Jan 1986 (v.57#1) pg. 71

How to design oscillator circuits. Part 1. Relaxation oscillators
RADIO-ELECTRONICS Jul 1986 (v.57#7) pg. 65

How to design oscillator circuits. Part 2. LC feedback oscillators.
RADIO-ELECTRONICS Aug 1986 (v.57#8) pg. 54

Audio oscillator (audible tone generator) circuit capable of driving an eight-ohm speaker. Use as an alarm, microphone tester, etc.
RADIO-ELECTRONICS Aug 1986 (v.57#8) pg. 83

How to design oscillator circuits. Part 3. RC oscillators, ways of generating sinewaves from other waveforms, etc. Includes a BASIC computer program to calculate the component values for an RC phase-shift oscillator.
RADIO-ELECTRONICS Sep 1986 (v.57#9) pg. 58
Correction RADIO-ELECTRONICS Mar 1987 (v.58#3) pg. 25

How to design oscillator circuits. Part 4. One-shots, squarewave, and triangle wave oscillators.
RADIO-ELECTRONICS Oct 1986 (v.57#10) pg. 72

How to design oscillator circuits. Part 5. Crystal-controlled sinewave oscillators.
RADIO-ELECTRONICS Nov 1986 (v.57#11) pg. 63

How to design oscillator circuits. Part 6. Digital clock circuits using TTL IC's.
RADIO-ELECTRONICS Dec 1986 (v.57#12) pg. 71

How to design oscillator circuits. Part 7. CMOS oscillators.
RADIO-ELECTRONICS Jan 1987 (v.58#1) pg. 65

A simple crystal-controlled oscillator uses a CMOS gate as an inverter.
RADIO-ELECTRONICS Feb 1987 (v.58#2) pg. 96

Making sinewave oscillator circuits.
RADIO-ELECTRONICS Jan 1988 (v.59#1) pg. 80

Working with monostable multivibrators. Learn how to design and build pulse generators and monostable multivibrators and how to use them in your projects.
RADIO-ELECTRONICS Apr 1988 (v.59#4) pg. 65

Compound op-amps. Standard op-amp circuits can easily be modified for applications requiring very high slew rates, high output currents, or output swings up to hundreds of volts. Includes voltage followers, inverting amplifiers, relaxation oscillators, 2-wire detectors, etc.
RADIO-ELECTRONICS Jan 1989 (v.60#1) pg. 69

Op-amp oscillators. Circuits for sine-wave, Wein-bridge, twin-T, square-wave, and several other oscillators.
RADIO-ELECTRONICS Jul 1989 (v.60#7) pg. 51

Elegantly simple oscillator uses a Schmitt trigger. Output is a full-supply square wave. Input is a triangular wave.
RADIO-ELECTRONICS Jul 1989 (v.60#7) pg. 67

Gated oscillator circuit uses a Schmitt triger and produces repeated tone bursts.
RADIO-ELECTRONICS Jul 1989 (v.60#7) pg. 67

Oscillators, theory and practice. Includes circuits for various simple oscillators.
RADIO-TV EXPERIMENTER #798 Aug-Sep 1966 (v.21#1) pg. 79

Circuit for a very stable, fixed-frequency audio oscillator.
RADIO-TV EXPERIMENTER Feb-Mar 1968 (v.24#1) pg. 34

Construction instructions for three types of oscillator, a salt-water oscillator, a flame oscillator, and a hot-wire oscillator.
SCIENTIFIC AMERICAN Sep 1970 (v.223#3) pg. 221