Ray Wang’s reflow toaster oven is used to melt solder on surface mount projects. Ray, who demonstrated 2 OpenSprinkler at Bay Area Maker Faire, modified his oven with a temperature probe controlled by an Arduino Pro, as well as an automatic door opener and auto-activating fan to reduce cool-down time. Finally, when the reflow is complete, a 433Mhz RFID transmitted pings three wall warts — one turns on the fan, one turns off the oven, and one turns on a lamp in Ray’s workshop so he knows the job is done. [via DangPro]