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Quote: Thanks for the interesting input - would you happen to know of any sources for this material?

Quote: That's a good idea. I don't think excessive speed is going to be a problem with the screw drive. At 500 rpm and 24 TPI on the rod, you get about 1/3rd inch per second travel - so a 12 inch high door should take about 35 secs to open/close. But if you're thinking about a cord...

Quote: Your first drill is 18V... if you're going to go with a battery/solar charger setup you might want to stick with 12v drills - especially since the solar panel trickle charger you point out is for 12v systems. (I have already bought that exact trickle charger btw). Also, if you're...

Quote: This is all good stuff - but I'm wondering if anyone has found a "low tech" way to actually reverse the polarity of the circuit based on the toggle condition. I'm still considering an H-bridge circuit for this as I plan to put an old BS-2 Basic Stamp to work in my coup for the...

Quote: Hi all, I'm new to this site, and as an ex-software engineer and electronics hobbyist I'm thrilled to see that there are some other nerds here who share an interest in automating their coups. I'm gonna feel right at home here On the issue of motors - I'm getting ready to explore...