Dual PID Controller

[jbolt]

A small project I have had the parts for a while now. The only machining was the cutouts in the steel sheet metal enclosure which I did on my little CNC router. 1/8" carbide endmill, 8k spindle and 3 inches perminute at a cut depth of .01"

The idea is to have a universal controller that can be used across several devices.

Today I used it while heat treating a custom tool to control a hot plate to preheat quench oil and a small oven for anealing.

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[Winegrower]

Yep, I did the same thing. These controllers are amazingly inexpensive ($13 or so as I recall). I used one to switch a 100 watt lightbulb inside an ice chest to brew Kombucha at just the right temperature.