Flutterby™! : thermostats & cooking

I should have listened to Larry a little bit more: how to make a thermostated waterbath for sous vide for under $150 points out that off-the-shelf controllers for thermostats aren't all that expensive, certainly quicker and easier than trying to build my own with microcontrollers and random thermocouplers, and I've got a couple of applications (tempering chocolate, building an electrostatis smoker, and then I've started thinking about processes for making things out of carbon fiber...) that'd benefit from some simple temperature control.