Added Info HANDS-ON ELECTRONICS Jun 1988 (v.5#6) pg. 5
Electrical testing. Equipment and techniques for locating short circuits, open circuits, and changes in electrical value.
HOMEOWNER Jul-Aug 1983 (v.8#4) pg. 20
Outlet tester indicates if a three-prong outlet has been wired up correctly. Also includes plans for a testing unit to determine that the outlet tester is operating properly.
INDUSTRIAL EDUCATION Dec 1978 (v.67#9) pg. 38
Ground-checker determines of the third wire (ground wire) in your home electrical system is really at ground potential.
MECHANIX ILLUSTRATED #496 Sep 1969 (v.65) pg. 120
Ground tester tells you by means of a light if your home electrical outlets are wired up properly.
POPULAR ELECTRONICS [1] Aug 1969 (v.31#2) pg. 71
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
DC polarity indicator, using two light-emitting diodes, also reveals presence of AC voltages and provides a rough idea of both AC and DC voltage levels. Works anywhere between 1.5- and 150-volts.
POPULAR ELECTRONICS [1] Apr 1974 (v.5#4) pg. 71
Simple polarity probe is great for checking IC's, automobile wiring, etc.
POPULAR ELECTRONICS [2] Nov 1989 (v.6#11) pg. 25
LED indicator circuits for all occasions. (1) AC pilot light. (2) DC pilot light. (3) Polarity indicator. (4) 5-volt voltage-level indicator. (5) Oscillator-driven flasher. (6) Decoder converts audio CW code into visual dots and dashes.
POPULAR ELECTRONICS [2] Oct 1991 (v.8#10) pg. 82
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
Simple diode circuits. (1) Bridge rectifier. (2) Sound-level (audio signal) limiter circuit never exceeds 1.5-volts peak-to-peak. (3) DC polarity or AC indicator circuit. (4) Kick-back voltage limiter for inductive loads. (5) Steering circuit controls relays based on voltage polarity. (6) Simple temperature sensor. (7) Circuit for selecting matching diodes.
POPULAR ELECTRONICS [2] May 1996 (v.13#5) pg. 64
Four-diode bridge circuit is used to direct the proper polarity of a DC battery or power supply to a circuit.
POPULAR ELECTRONICS [2] May 1997 (v.14#5) pg. 63
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
Outlet ground tester checks ground connections in house wiring.
POPULAR MECHANICS Jul 1965 (v.124#1) pg. 148
Auto battery polarity tester. Est. cost: $2.
POPULAR MECHANICS Nov 1966 (v.126#5) pg. 166
Three-wire socket checker. This device checks 3-wire outlets for presence of voltage, for correct polarity, and for an effective ground connection.
POPULAR MECHANICS Mar 1967 (v.127#3) pg. 188
Electric outlet tester tells you if three-wire outlets have been wired up correctly. A built-in meter also displays the voltage.
POPULAR MECHANICS Jun 1976 (v.145#6) pg. 42
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
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
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
How to check for wrong-way polarity in your home wiring.
POPULAR SCIENCE Jul 1985 (v.227#1) pg. 85
Build this AC outlet checker to test polarity and grounding.
RADIO-ELECTRONICS Aug 1979 (v.50#8) pg. 53
How to determine the polarity of the voltage at a certain point in a circuit.
RADIO-ELECTRONICS Jan 1983 (v.54#1) pg. 72
Polarity tester device will indicate the polarity of a battery or battery charger, either 6- or 12-volt. Est. cost: $3.
RADIO-TV EXPERIMENTER #789 Jun-Jul 1966 (v.20#3) pg. 89
Polarity indicator for a 6- or 12-volt battery or charger. Est. cost: $3.
SCIENCE & MECHANICS May 1968 (v.39#5) pg. 71