I need to create a test fixture for 18 traces on a PCB board, I need to send voltage to 2 traces at the time and light up an LED if we encounter a short between those 2 traces. There are 32 combinations of test applied to these 18 traces. If a short circuit is encountered I need to turn an LED to show the place of the 2 shorted traces and leave it on.
I will create an identical layout of the traces with an LED connected to each individual trace. So I need to shift the voltage around until I complete the test of all these traces. The complete board has 30 mini boards, each with 18 traces. At the end only the mini boards without any LED's ON will pass the test.
Could someone help me with some ideas on how to accomplish this? I was thinking on using a PLC (Programmable Logic Controller), but I am sure I could accomplish the same results with a different much smaller controller.