Years ago, I had a need for a low voltage dimmer switch for a small electric motor powered by two AA batteries. I did not do a lot of paper or computer design work for this project. But, I was able to put something together that worked. I have been using it a number of years now and have not found any problems with the mini circuit board design. My next step is to get it reversed engineered for possible mass production. I know there now other designs out there? But at that time there were none. The use application is unlimited, I think that it could be used by robots makers, were two speeds electric motor application may be needed? So, where to send it for reverse engineering? and proper paper or computer design plans? or should I keep it as keep-sake for the grand-kids?