LiPo heatbox controller for 12v heatmats using PI control loop and 16x2 LCD
- PI control loop for exact and fast temperature control
- 16x2 lcd for data visualisation and configuration
- 4 buttons (up / down / enter / return) for easy navigation and configuration
- max. current protection
- min. voltage protection
- max temperature protection
- 2 profiles with different settings (e.g. one for heating at home with stationary supply and one in car with different min. voltage protection)
the lcd is connected using i2c, standard 16x2 hd44780 lcd.
the current is measured using an acs712 current sensor with 5amps.
you need a voltage divider on the voltage pin.
| pin | description |
|---|---|
| A0 | voltage measurement |
| A2 | current measurement |
| 4 | eeprom reset |
| 5 | ground for buttons |
| 6 | enter button |
| 7 | up button |
| 8 | down button |
| 9 | return button |
| 10 | mosfet for heat mat |
| 12 | onewire sensors |
| i2c | lcd |
https://github.com/PaulStoffregen/OneWire
https://github.com/milesburton/Arduino-Temperature-Control-Library