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I get to rebuild this nonsense the next few days. Built by an engineer some ten years ago. 5
Point to point wiring with really poor quality wiring. It breaks constantly and is difficult to work on. Gonna rewrite it with an eye towards serviceability.
Can you just make a new one and use that one for reference?
This bit is part of a test system that automates a manual test for a pcb that runs a laser diode and gets back readings from a photodiode. A lot of analog-y goodness. This was built by one of our engineers a few years ago and every time it needs to be serviced, it turns into a week long game of whack-a-mole of frayed wires and broken solder joints. Dude knew his stuff, some serial to USB adapters to plug in a function generator, oscilloscope, and data acquisition module, an arduino and touch screen for the UI, and a raspberry pi to run the whole show. But he clearly didn’t think this would ever have to be opened and messed with.
Annoyingly, documentation is a bit thin and he doesn’t work at the company anymore, so I am not just rewiring it, I’m reverse engineering it.
I know I can do it, but I have to ohm out each wire in the 100 conductor wiring harness back to the relay in the data acquisition module, then cross reference the relay in the ~1400 lines of python code to see what does what. From that, I’ll compare that to the PCBs schematic to what pogo-pin that wire should go to. And yes I’ll be making a schematic after all this for future reference, just gonna take… a while.
This looks like how engineers get promoted to management.
It’s gross..pogo pin receptacles soldered to one another.
That seriously need a NSFW tag on it. As an Engie myself, I was blessed with the start as a hobbyist and then a tech first and that causes physical pain to see.