I have been asked several times for the code for this control. Thought this might be the best place for it.
The story is my wife bought a used manual kiln. They are a pain in the butt to baby sit while fusing glass. I am a cheap skate and did not want to spend the $150 $200 bucks for a pre-made one. At that time I had just found the Arduino platform. I purchased one as well as the buttons and LCD from Sparkfun did some reading and found this shieldhttp://store.ryanjmclaughlin.com/interface-boards/assembled/nulzg
then got to work.
It took me a couple of weeks to figure it all out. A few missteps and very hot kiln for the first trial run, but got it pretty well ironed out.
It uses a Potter & Brumfield Relay 92P7D52-12 run by a TIP102 soldered into the shield. I don't have a schematic just kind of did it as I went along.
I think I left enough comments to follow and help someone understand what is going on.
Don't be to harsh first Arduino code still learning.