COTM_AugustTransistorJeri Ellsworth shows how to build your own NMOS transistor out of a kiln, vinyl cutter, Emulsitone, stain remover, and a silicon wafer she found on Ebay. Be sure to check out Jeri’s YouTube videos, which feature a glorious array of nerdy projects. Some of her other videos include other experiments with DIY semiconductors — here is a playlist of the whole series.