- Wed Jul 20, 2005 7:00 am
My plan is to put it on the outside of one of the 'inside' oven walls, and have it inline with the AC line feeding the relay. That way, if the oven overheats, it not only turns off the coils, but the power to the relay, effectively de-energizing all of the 120VAC parts of the circuit at once. Also, it won't be in the direct heat of the coils. If things get too warm, there's a distinct chance plastics could soften, and I prefer to take the power away completely if that's even a remote possibility.
I'm also thinking about a Robin Hood/Friar Tuck scheme, where a small, cheap micro would piggyback onto the system and serve as an active check for the main microcontroller, in both watchdog and monitor capacitites. That will no doubt add a lot of complexity to the project, and is thus at the very bottom of my list, behind the differential heater drive and the active fan control, but it will definitely make the project close to bulletproof.
This is not a sig. This is a duck. Quack.