Wireless robotics: Fast robot prototyping. Team Hurtz Information page. Arduino - HomePage. Servo Squirter. In this video, we'll show you a simple project where we connect a hobby R/C servo to a small water pump, and control both from the USB NerdKit. Using input from the connected computer, you can aim, and fire a stream of water. The video also introduces topics like Pulse Width Modulation (PWM), including how hobby servos share a common protocol (1.0 to 2.0ms pulses), and how to use the ATmega168 to generate these pulses. Perhaps you can add another servo, and use this to water your plants? Here are two photos of the mechanical assembly: (click to enlarge) The first part of our circuit just connects to the servo. Click below to see larger images of the schematic, etc The second part of the circuit allows the microcontroller to switch the pump motor on and off. For VGS below about 3.0 volts, no current is allowed to flow.
And now you've actually learned about all three modes of MOSFET operation: cutoff, triode, and saturation. In addition to our USB NerdKit and a wall DC adapter, you'll need: Dan Fernandez's Blog : Microsoft Robotics Studio CTP Now Av.