Finally starting my PID controller
I have all of the parts I need and am finally starting my PID temp controller build. My birthday is next month and I want to do a brisket, but don't want to be up all night again. I'll post pics tomorrow, but for now it should work as follows:
Temp control via a Thermaltake smartfan, high/low temp alarm (indoor and outdoor), A/C power fail alarm, meat temp reached alarm (if I can get the voltage divider circuit and OP amp working), lid open fan disconnect, PID shutdown when meat temp is reached.
I should have the whole thing running except for the indoor alarm and possibly the meat temp reached alarm and shutdown. I built an OP amp circuit today to boost the beeper voltage on my thermometer to a high enough voltage to trigger a delay timer relay that will power the alarm, but didn't get to test it yet. It should work, in theory. I also wanted to power the meat thermometer from the 12vdc power supply and avoid the batteries, but haven't got the voltage divider quite right. I need to drop the 12vdc to 3vdc for the thermometer.
If all goes well tomorrow, I should be good to go. If all goes poorly, I will get electrocuted or burn the house down in really spectacular fashion.
El Cheapo Royal Oak charcoal grill (heavily modified and repaired), Chargriller Pro, Webber 22.5" Silver, Webber Smokey Joe, Hibachi, UDS, ECB Square
My name is Monty, dad, or grandpa...depending on who you are.