Correction POPULAR ELECTRONICS [1] Aug 1968 (v.29#2) pg. 14
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
Micropower audible continuity tester applies 0.3 volts to 55 uA to circuit under test.
POPULAR ELECTRONICS [1] May 1974 (v.5#5) pg. 47
Build a polarity-sensing continuity tester.
POPULAR ELECTRONICS [1] Oct 1974 (v.6#4) pg. 66
Unique continuity tester generates only 50 microamperes.
POPULAR ELECTRONICS [1] May 1975 (v.7#5) pg. 33
Electronic Christmas gifts built around the TL489C analog level detector. It can be used to make (1) soil moisture detectors, (2) temperature range indicators, (3) controls and alarms for fish fanciers, chemists, chefs and photographers, (4) battery & continuity testers, (5) toys and games, (6) simple light organs, (7) humidity alarms,...etc.
POPULAR ELECTRONICS [1] Dec 1978 (v.14#6) pg. 78
Cordless DC test light can be used to check for the presence of 6- to 24-volts DC and does not require a ground connection. Instead, your hand against the chassis is a sufficient ground. Ideal for checking automobile wiring. Est. cost: $5.
POPULAR ELECTRONICS [2] Jan 1990 (v.7#1) pg. 61
Continuity checker circuit eliminates false readings caused by coils or low resistance devices in a circuit.
POPULAR ELECTRONICS [2] Mar 1990 (v.7#3) pg. 25
Circuit used to test for opens in cables, bad circuit-board traces, or intermittent circuits (swingers) in security systems.
POPULAR ELECTRONICS [2] Mar 1990 (v.7#3) pg. 27
Smart continuity tester detects both continuity and low resistance through a component.
POPULAR ELECTRONICS [2] May 1990 (v.7#5) pg. 24
Junk box continuity tester always seems to work regardless of what parts are used in its construction.
POPULAR ELECTRONICS [2] Sep 1990 (v.7#9) pg. 27
Low-voltage continuity tester applies a mere 0.3-volts DC to the circuit under test.
POPULAR ELECTRONICS [2] Dec 1990 (v.7#12) pg. 25
Continuity tester circuit that will detect brief opens and shorts.
POPULAR ELECTRONICS [2] Jan 1991 (v.8#1) pg. 25
Continuity tester circuit features a test/hold button that tests the buzzer by making it sound in both the normally-open and normally-closed modes.
POPULAR ELECTRONICS [2] Feb 1991 (v.8#2) pg. 25
3x3 visual continuity tester also gives a relative resistance reading.
POPULAR ELECTRONICS [2] Feb 1992 (v.9#2) pg. 53
Simple continuity tester is housed in a plastic coin-holder tube.
POPULAR ELECTRONICS [2] Sep 1993 (v.10#9) pg. 45
Component tester circuit checks diodes, bipolar transistors, and SCR's, and tests for continuity.
POPULAR ELECTRONICS [2] Aug 1995 (v.12#8) pg. 30
Dual-function 12-volt DC and continuity tester circuit. Either determines the presence and polarity of a 12-volt DC source or functions as a continuity tester.
POPULAR ELECTRONICS [2] Aug 1995 (v.12#8) pg. 32
Continuity checker circuit lets you decide whether you want an audible or visible indication of continuity.
POPULAR ELECTRONICS [2] Oct 1996 (v.13#10) pg. 67
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
Cordless voltage probe uses a piezoelectric buzzer to indicate the presence of a voltage. Can also become a continuity tester with the addition of a 9-volt battery.
POPULAR ELECTRONICS [2] Mar 1999 (v.16#3) pg. 47
Two continuity testers made from simple electrical supplies.
POPULAR MECHANICS Jan 1966 (v.125#1) pg. 189
Modify an old photographic light meter to function as a continuity meter.
POPULAR MECHANICS Sep 1967 (v.128#3) pg. 181
Continuity tester built into the handle of a screwdriver.
POPULAR MECHANICS Feb 1968 (v.129#2) pg. 186
Combination continuity tester and polarity indicator fits into a pill vial. Suitable for 6- and 12-volt automobile electrical systems.
POPULAR MECHANICS Mar 1977 (v.147#3) pg. 184
Build this shock detector for your home and car. Both a visible and audible signal identifies shock hazards and tests continuity and faulty ground connections.
POPULAR MECHANICS Feb 1978 (v.149#2) pg. 120
Make this ground and continuity tester. Use it to check your automobile cables. Est. cost: $2.
POPULAR MECHANICS Nov 1978 (v.150#5) pg. 60
Convert an ordinary flashlight into a continuity tester.
POPULAR MECHANICS Sep 1989 (v.166#9) pg. 96
Matchbox-sized gadget (1) determines polarity of 6- or 12-volt system, (2) checks for presence or absence of voltage and (3) tests electrical continuity.
POPULAR SCIENCE Apr 1972 (v.200#4) pg. 154
Audible continuity tester is helpful when checking wire-wrap circuits.
RADIO-ELECTRONICS Nov 1984 (v.55#11) pg. 86
Latching continuity tester helps locate those difficult-to-find intermittent shorts and opens that other testers seem to miss. Est. cost: $25.
RADIO-ELECTRONICS Nov 1986 (v.57#11) pg. 49, 65
Correction RADIO-ELECTRONICS Jan 1987 (v.58#1) pg. 18
Continuity tester can also be used as a code practice oscillator. Est. cost: $4.
SCIENCE & ELECTRONICS [1] Oct-Nov 1970 (v.28#5) pg. 73
Wooden board with several battery holders and some wiring can serve as a low-voltage power supply, a continuity checker, a bulb tester, a code practice blinker, etc. Est. cost: $2.
SCIENCE & MECHANICS May 1968 (v.39#5) pg. 66