Sometimes ya gotta drive a something that requires a little more current than the microprocessor can source. I made this silly device to notify me when my long-compiling code completes operation, and also to provide notification when new folks subscribe to my youtube channel. I’ve seen a bunch of tutorials that show how to protect driver transistors from high voltage when inductive loads are used, but sometimes they’re short on details or don’t hook it up to the scope. I built this nutty thing, so maybe it’s a good opportunity to show how all that stuff works.