I did this last night when I was watching TV, specifically svengoolie. It is a dirty little vice, I wash my hands afterwards.meanwhile I solved a personal problem of how to make a bidirectional constant current source let's get some triangle generators that would prove it . Then it occurred to me I could generate that same triangle wave much more easily and fewer parts which I also drew .

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early sketches of the evening look something like this:

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terrible what people want to do when they're bored come isn't it?​