A look inside a dial based resistance substitution box.
I've had this resistance substitution box for a very long time. I can't even remember where I got it from, but it might have been Tandy/Radio shack. Basically speaking it's a rotary dial that lets you select a resistance from 36 standard values by rotating a dial. It's INCREDIBLY useful for prototyping. In this video I was opening it up to see if I had managed to smoke any of the resistors, since it sometimes gets a rough ride.
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