A litany of dumbassery

[Jos]

As said by others, a cable tester is a nice tool. Have a look at the one I’m using whenever I make a new cable:

Simple euro rack cable tester

This seems to be an elegant and simple solution to the problem of checking for continuity and shorts in a self made euro rack cable. You need only a few passive components: [flat_cable_tester_01] It uses only passive components. You connect the DUT (device under test i.e. your self made cable) between SV2 and SV3 (SV1 is for powering the circuit). Given that all LEDs will form a long chain, their summed forward voltages must not exceed the supply’s voltage (he recommends to not use white or b…