Greenwatts

LM339 Drive

The new drive units use a motor and gearset from a battery powered screw driver or battery powered drill providing lots of torque. A worm gear is adapted to the chuck or drive shaft and it turns a spur gear much like how a slew gear works. For the first build I am using a Skill Twist battery powered screwdriver and the drive unit designed to handle a 2watt solar PV panel. For the second build I will construct a heavier drive unit using a 18 volt power drill motor and heavier gears.

I do not have all the pictures available from the first build so if you have any questions just post them on our comment section or send me an email and I will provide you with more details. The first step is to dismantal your screwdriver, remove the batteries and cut off the handle. Drill a small hole near the end of the motor and feed the motor wires into the housing and solder them to the motor contacts as shown. Drill two pilot holes in the end of the plastic screw driver plastic housing which will be used to attach the screw driver to the gearbox housing in the next step.