http://github.com/johnboiles/OpenVSD
A small board and accompanying Arduino firmware that allows you to turn a normal diaphragm pump into a variable speed diaphragm pump.
1x 5V Pressure Sensor
1x IRFZ40 High-power MOSFET
1x MCP1416 MOSFET Driver
2x 0.1uF Capacitor
1x 1uF Capacitor
1x 5V Sparkfun Arduino Pro Micro
TODO
Add flyback diode
Better footprint for screw terminals
Proper footprint for film capacitor
Silkscreen to indicate orientation of Arduino
Switch to default back to pressure switch
Debug LEDs