Many years ago, a Harbor Freight air compressor was purchased. The air compressor (like most) has a pressure switch as well as several brass components that feed into the tank and the sensor which tell the air compressor when to turn on and off the compressor. Over the years the brass parts broke down and eventually the switch failed all together.
So instead of purchasing new parts (which ended up being discontinued) I decided to wire up an electrical pressure sensor to a brass T fitting that was installed inline and feed that data to a microcontroller which operated a high voltage relay. This also allowed me to program at what PSI I wanted the compressor to turn on and off at which I was not able to do before.
The components used were:
- Air Compressor
- NOYITO AC to DC Power Supply
- Arduino Micro
- Tolako 5v Relay Module 5V
- PS-150 Pressure Sensor (0-150 PSI)
Enjoy this interactive 3D model!
This is an isometric exploded view of the case assembly. The Prototype PCB is built outside of the case.
Here are some real world photos.
Feel free to send me any questions or comments via the Contact page.
Thanks for reading!