This is a different piece for the base of the remixed part. (so grab the rest from the main page). On this base i added three scopes to help with Polar alignment. As the base needs to be aligned with a pole,pointing the tracker at Polaris for the northern hemisphere is needed. The 3 circles allow for rough medium and fine adjusting
Netduino Update 6/29/2018
I'm using the ULN2003 like the other remix. so much cheaper and smaller, very nice find.
I couldn't find any arduinos laying around but i had an old netduino 1. I created a program for it and added it to the thing files. It rotates the large wheel at 4.7 RPM, which for the 20.3cm distance should be correct for the M5 thread pitch.
Features in the code:
-short press the button, it reverses the direction.
-long press the button (2 seconds), it speeds up x4, turns on the blue LED. Long press to go back to 1x speed.