NeoMoses:
for a relatively cheap (<USD100) highly portable (it's smaller than a credit card) solution look into the BASIC Stamp controller. It has to be programmed but you could learn everything you need in a couple of hours. The manual is free online at
http://www.parallaxinc.com in .pdf format.
robotic regards,
Tom
p.s. I have no connection with Parallax, just a satisfied customer. I have purchased several hundred of their units over the years and only had one DOA, which they replaced over-nite free of charge.