Full Discloser: I made it at Techshop and I highly recommend anyone near one to check them out.
1 Analog Slow Cooker: I used one I found on Amazon. The analog part is important because we're going to mess with the power.
1 PID Controller: Search for "Mini Digital Temperature Controller Thermostat Aquarium" on ebay and find one for around $16.00
1 sheet of 1/4" thick plywood: I used Create for Less
1 lightbulb socket adapter: I got one from Amazon
1 lightbulb socket: From Amazon
1 two prong power cord (I took mine from a broken appliance)
a small length of regular electrical wire
Step 1: Laser Cut The Encloser Pieces
I have attached the three .ai files you'll need for the Epilog laser cutter (found at most Techshops). It's based on a 1:1 scale and is designed for 1/4" thick plywood and the exact controller I linked to on the previous page. If you are in any way going to deviate from the plan (and even if you aren't) I would highly advise going in and double checking thicknesses and clearances. Make it yours. Also, the hexagonal shapes on the layouts are not necessary, I just included them since two pieces couldn't fit in my original lasercutting stock. Feel free to disregard those.
Step 1: Follow all necessary procedures to setup your laser cutter
Step 2: Cut the stock
Step 3: Check fits
This is supposed to be a tight-fitting jigsaw puzzle, so definitely play around with it. The tolerances in my design were rather snug, so I chose to lightly sand some area, but for the most part was able to leave the design as it was.