Low cost Electro-pneumatic circuit for Soft Robots

Rather than using manual pumps or squeeze bulbs to actuate your next soft robot project, a cheap and quick design using your Arduino microcontroller can be used. The circuit works well for any pneumatically powered robot with input pressures between 0 - 60KPa. If you already have an Arduino and a power supply, the design can be implemented with less than $50. Estimated time to complete the design is 2 hours or less.