Looks nice. But that slew drive where can i get those ? I'am looking for a small/light (<4KG) slew drive. I only can find big large slew drives to turn turrets and that kind of things.

From here: http://www.linearbearings.com.au/Default.aspx?tabid=112

I purchased a drive second hand, but still haven't found time to start on this project. I get a few weeks off in about a month so im hoping i can do it them. I got 2 200watt Suntech panel i want to drive of this.

Its nice and small, but puts out huge torque, runs off 24VDC. Doesn't move fast, just slow and torquey, but thats what i want.

That looks nice. But i'm looking for a non linear drive to steer my boat with ! My motorpod is below the water and a normal steering cable from a boat is very heavy (9kg) and you can't make a 180+ dergee turn.

i like all your solar trackers. i was thinking about how i will make a solar tracker for my concentrated PV project. it seams from all your responces that sensing brightness is no good. i don't know how to program or use pics. is there a ghetto sun tracker option? what about timmer plugs for controlling the motor? just push down the segments that you need to keep the array pointed at the sun.

I request you to share the sun tracking algorithm / formula.

regards
ARM

Hi Arm,

I found a nice ALT/AZ formula on the South African Observatory website -http://www.saao.ac.za/public-info/sun-moon-stars/sun-index/how-to-calculate-altaz/

This is the one I use on my tracker.

Regards,


Paul.