The telephoto lens test for the Quickcam 9000 Pro Tactical Nerf Targeting System was successful aside from some mounting issues and lack of a tripod.
These Zigbee radio modules, with SPI bus interface, are available for under $10 each from Microchip. Perfect for a simple wireless robot interface.
Texas Tech University has a great robotics website with information as to how to avoid frying your microcontroller by using transistors or optoisolators. Useful when you need to sink more then the 25 mA, or less, that most microcontrollers are capable of. A darlington array is a set of optoisolators which can be used to build a stepper motor control.
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