So USB opto-coupler widget has been built

Spent the bulk of the day working on compute shader lighting when really I should have been finishing off my presentation, still I did manage to do a bit of it in the end. Walked Sasha. Did a bit more work then went out for a couple of hours. Managed to get a Geocache that had stumped me for a couple of years, I was trying too hard, it was actually fairly obvious in the end. Came back and built the projector trigger interface. I had enough stuff lying around to do it. Okay, so I used a four channel opto-coupler, but it had probably been sitting there for the best part of ten years. All packaged up in a small plastic box. It works on the bench, I’ll try it for real tomorrow. Pizza time, extra chicken tonight.

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