| http://www.w3.org/ns/prov#value | - Well the first possibility if you want to build it yourself is the $50 robot micro controller. it is really cheap to build and a programmer is cheap if you have a serial port, but they are quite old and there are not many left especially on laptops. therefore you may need to invest in a programmer but the way to look at it is it is a one time buy and you can get one that will last a long time for
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