Dual Stage Temperature Controller
thingiverse
Here's one version of my dual stage temperature controller that I somehow managed to salvage before OnShape completely trashed my assemblies. Hook up a refrigerator and a heating pad to the AC outputs, load/tune the code for your hardware, and you're ready to roll. BOM: Adafruit 2821 Feather HUZZAH with ESP8266: https://www.amazon.com/gp/product/B01BV3AU0Y 5v AC-DC stepdown module: https://www.amazon.com/gp/product/B01BV3AU0Y Dual 5A solid state relays: https://www.amazon.com/gp/product/B008BGLM02 10A Fused AC input: https://www.amazon.com/gp/product/B01LYMNQ2L or https://www.amazon.com/gp/product/B06XKBRT9M AC power sockets: https://www.amazon.com/gp/product/B008J80J1A I know some of these parts are no longer in stock, but I've included the links to show you what they looked like. You can disregard the microSD card since all data is now being stored on the cloud. I'll share the code on github soon.
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