Logic Probe Tester

Logic Probe construction

The purpose of the Logic Probe is to more conveniently test that circuits are closed.  This includes fuses and various accessories  around a vehicle.  Generally a multi-meter for example, must have both pins touching each terminal of for example, a fuse, and it is not convenient to have both hands full while having to turn your head to check the multi-meter.  A probe is a simple one pin construction, with a wire that dangles off, which can be hooked up to the negative terminal of a battery with an alligator clip.  The pin itself has a red LED and a green LED mounted onto it, which lights up green when the circuit is correct and red when incorrect or has a fault.

Logic Probe parts list:

• ·         Red & Green LED
• ·         Black wire 2m
• ·         Red wire 2m
• ·         2 resistors 1k ohm
• ·         Alligator clips
• ·         Plastic tubing and appropriate shrink wraps

Note: This device is only good for 24 Volts or less. D/C only.