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Showing posts from December, 2011

Some old notes

I was browsing around some of my files on the clock and figured I'd post some of the notes I took on the drive components.  From my notes on 3/16/2011: Servos/motors: I thought about using stepper motors to drive the hands but gave up because the Arduino motor shield can only drive 3 steppers.  I need 5.  This is the model of sail winch servo I used:   GWS Sail Winch Servo S125-1T.  Most places have them for $20-30 each. After the fact, I think that steppers would be possible with the Arduino using some custom mux/demux circuits to select one of the multiple steppers to drive and an external driver board like this one:   http://www.sparkfun.com/products/10267 The mux/demux circuit could use this chip:   http://search.digikey.com/us/en/products/HEF4051BP,652/568-1689-5-ND/763293 Gears: I used these two types of gears:   A 1T 2-Y32048 from  https://sdp-si.com/index.asp drive gear on servo:  48 pitch, 96 teeth, 2"...