AIR COMPRESSOR CONTROLLER |
Air compressor automation designed around of ATMEGA328 and Visuino software, Arduino IDE compiled.
EEPROM initial programming is not required. After first power ON, select values of Start/Stop and Purge. All values will be automaticaly stored to EEPROM.
The project can be modified according your necessity via Visuino software. Below specifications are according to my air compressor.
Install Arduino IDE board support: https://mcudude.github.io/MiniCore/package_MCUdude_MiniCore_index.json and before compiling select Internal 8MHz Atmega 328(P).
Specifications:
- 8 digits LED Display - easy to read, robust (on board MAX7219 common cathode or external MAX7219 display)
- Start/Stop adjustable setpoints, EEPROM stored (between 5 ... 10bar).
- Water purging solenoid energized according adjustable start/stop cycles, 2 seconds pulse (display "Purj" ~ romanian abbreviation).
- NO Digital trip input suitable for motor thermal relay or manual emergency shutdown. NC auxiliary contact of thermal relay is connected series with main contactor coil. "Trip" message in case of failure.
- Support for pressure transmitter, 4-20mA or output voltage type
- Zero/Span calibration by variable resistors
- Pressure range 0...12bar, resolution 0.1bar, average filtering
- Spare analog input (maybe air temperature monitoring)
- Spare digital input
Schematic diagram v.1
Atmega328 firmware v.6.6 (flash)
Visuino project 6.6
Fuse bits 8MHz internal
