Been a while since designing and building this for a Student's project, a ROV - remotely operated vehicle. Time to strip it down, salvage some and pass other bits for recycling. I said Student project, but as well as designing and building the circuit board, after ordering the bits, I'd also designed most of the circuit for him. I know he'd one of the mechanical Lecturers design and build most of the hardware, plus a few other staff did various other parts. His practical skills weren't great, and I did (semi) joke with him that engineering management would be a good option for him, as that was the way he was getting his project done.

Underside in the extra. Some of the tracks have been thickened with copper wire and plenty of solder. Those tracks are for handling heavier currents to the four direction controlling motors. The wee blue boxes are relays, with a pair for each motor - forward/reverse, or up/down, depending on the particular motor's use. LEDs used to indicate which relays were being activated, partly for verifying the circuit's operation... and the Student's correct wiring to/from the board! It was the first double-sided board I'd done for a while (copper tracks on both sides).

Blipped previously after making it, a little over ten years ago.

Cycled again, but turning very cold tonight.