Hello,
With BBQ season coming up I thought I would take a crack at a temperature regulator for my BBQ smoker. I have seen online that some individuals have attached a servo to the damper and use a microcontroller and a PID control loop to maintain a constant temperature in the smoker box. I am very novice, having built only a few circuits in my life and would like some guidance on the appropriate way to measure the temperature with the ADC on an AVR microprocessor. I have drawn up a simple circuit using a voltage divider consisting of a thermistor and a 10K 1% resistor to present a voltage to the ADC pin for measuring. I have put together a spreadsheet that shows what the ADC should be outputting based on the temperature of the thermistor. I would be greatly appreciative if someone could take a look at the work to see if I am on the right track or if I am missing something important. The files are attached below and the datasheet for the thermistor is here:
http://www.specsensors.com/pdfs/ntc_radial_glass.pdf
I'm using the G_1396 thermistor.
This will be my first circuit design so any additional help (i.e. where to put all of the capacitors that I always see between everything and ground as I still regard the sizing and placement of those as voodoo) would be appreciated.
With BBQ season coming up I thought I would take a crack at a temperature regulator for my BBQ smoker. I have seen online that some individuals have attached a servo to the damper and use a microcontroller and a PID control loop to maintain a constant temperature in the smoker box. I am very novice, having built only a few circuits in my life and would like some guidance on the appropriate way to measure the temperature with the ADC on an AVR microprocessor. I have drawn up a simple circuit using a voltage divider consisting of a thermistor and a 10K 1% resistor to present a voltage to the ADC pin for measuring. I have put together a spreadsheet that shows what the ADC should be outputting based on the temperature of the thermistor. I would be greatly appreciative if someone could take a look at the work to see if I am on the right track or if I am missing something important. The files are attached below and the datasheet for the thermistor is here:
http://www.specsensors.com/pdfs/ntc_radial_glass.pdf
I'm using the G_1396 thermistor.
This will be my first circuit design so any additional help (i.e. where to put all of the capacitors that I always see between everything and ground as I still regard the sizing and placement of those as voodoo) would be appreciated.
Attachments
-
21.6 KB Views: 11