Large homemade servo's. Possible?

[DavidNZ]

Hi, Just curious to see if anyone has had any luck making a driver circuit or modifying a standard servo to drive a larger motor such as a windscreen wiper motor off your standard rc gear? Would have to mount the pot on the output of the bigger motor and use a large 12v battery as the source. Would greatly help a new project. Any help appreciated.
Cheers
Dave

[sahilkit]

hi david

as far as i know this is the only DIY servo link

http://www.rcgroups.com/forums/showthread.php?t=475518

bye

sahil

[Chickenthief]

This guy has made something like the thing You want:

http://www.fieroaddiction.com/buggy.html

[bsrman14]

Buy a TONE SERVO. :cool:

[vintage1]

Its really not that hard..H bridge and 4 hefty power transistors, big output pot, and a means to drive them..pic good probably. The nifty bit is in the algorithm to slow the speed down as you approach the correct position to avoid overshoot.