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Propeller "Motherboard" $20

Propeller "Motherboard" $20
This is the core of the device. This nice 3"x4" $20 development board come with a Propeller 8x20 MIP processor.

It is a multitasking processor. There are lots of prewritten drivers and cheap ($20) headers that allow it to interface keyboard/mouse, TV (rca), VGA, compass, tilt sensors, screens, etc.

It also runs from an external crystal so it is comparable to your wristwatch for accuracy.

Note: You need a $20 USB->Serial adapter to program it with a modern computer.

Propeller Prototype Board