A fun toy put to good use.
Add as many test ports as needed to ring out your multi conductor cable. Use no more than 2 switches at a time. The connections between the switches and leds are the wires that need to be identified. Ground is connected based on the length of the cable being tested. This makes the two halves of the unit easier to put away or carry in your troubleshooting pouch. Now it can also work without the timer.
