Need to control a pneumatic cylinder? We use low voltage compressed air cylinders at work, and that gave me the idea for some cool steampunk style pneumatic controls. The Arduino can use a relay to activate the solenoid on the compressed air cylinder, extending the cylinder and retracting it. This could be used to open and close doors, robotic arms, and many other uses. A source of compressed air, and 12v (or 24v) for the solenoid would be needed.
Become the Maker you were born to be. Try Arduino Academy for FREE!