This project is a small water pump mounted on top of a servo for directional firing. The whole thing is driven by a microcontroller, and controlled from your keyboard over USB.
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Step 1: Gather the Materials
This project is microcontroller based. Other than the ATmega168 microcontroller included in the USB NerdKit. For this project we used the following:
1 Hobby Servo, Hitec HS-50
1 Low voltage piston water pump
1 Small n-channel MOSFET, 2N7000