First Project

Yeah, hook up an op-amp to the thermistor and a voltage reference. When Vtemp > Vref, op-amp switches off the heater. (Drive the heater thru a nice transistor or MOSFET.) Calibrate the temp with a thermometer and you're done.

As for actual refs...Google op-amps.. transistors.. resistors.. capacitors.. and the nature of the universe itself.

I do however question the usefulness of your project. Do you realize how many batteries this is going to go through to keep it heated for ten minutes? You'd better have aerogel insulation in there.

Tim

-- Deep Fryer: a very philosophical monk. Website:

Thanks, I will look up those terms latter today when I have some time.

The air does not need to stay at that tempature. Just warm up to the correct temp and then shut off. There is nothing stopping me from plugging it into the wall, I just thought that would increase the difficulty and cost. There may be better ways to make this, like I said it is my first project.

PS: On

It's finals week.

Cheers! Rich

Good Luck! Rich

Why not a toaster oven?