Open Temperature Controller

Open Source Temperature Controller

The open source temperature controller allows you the flexibility to control DC appliances based on the temperature of two thermistor inputs. The processor is reprogrammable with an AVR ISP. To get you started, we include a temperature comparison program for an automatic heat exchanger. The controller has both green and white LEDs to indicate status. 

The default program allows you to experiment with a wide variety of temperature control applications out of the box.

Some example uses include:

- Temperature controlled switch
- Automatic heat exchangers
- Automotive switching (e.g. fan relays, solenoids, intercooler spray, methanol/water injection, A2W intercooler pump control)
- Heater control
- Peltier control

Specifications:

- Input Voltage, Vin: 6-24V
- 2.1mm DC barrel jack
- Output: Outputs the input voltage
- Output is PWM capable
- Max current: 4A (can drive standard relays for higher output)
- ATMEGA48 processor
- ISP port for re-flashing and programming
- Green LED and 8200k White LED

Downloads & Source:

We provide the code and schematics under the Creative Commons license.
Source Files (Schematics, Program, Gerbers)