cup-cooler

This is my first Instructable, so please judge harshly so that I can learn 🙂 Its a simple project minimal skills needed. Drawings are made using: Fritzing Code Written using Codebender The cold plate got to -20c Watter in the cup measured @ 5.5c compared to icecube @2.5c   Step 2: Wiring everything Optocoupler 4N33 […]