Cup Cooler using an Arduino

This is my first Instructable, so please judge harshly so that I can learn πŸ™‚ 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 …

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