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Xringer · 06-16-13, 03:47 PM

MTM keeps their circuit diagrams secret.
I think they want to people to buy their product, instead of copying it.

If you really want to use relays, there are simple circuits posted on the web..
Electronic Projects

"This is about the simplest tracker I know of. It uses a Radio Shack 275-249A relay. Adjust the sensitivity of the CdS cells with a Sharpie permanent marker as described bellow, in the Chace tracker. The picture tells it all.

This tracker is not as accurate as the electronic tracker but quite sufficient for use with PV panels.

While the proof of concept is good it will burn the relay contacts. This is caused by the relays being turned on or off slowly. It melted the plastic case on the relays. "

edit:
Schematic for Solar Collector Sun Tracking, Richard Gideon shares solar technology, Phoenix Turbine Builders Club Developer of the Month

Here's another relay tracker for those who fear the transistor..

This one looks pretty good. If you build one of these, be sure to use socket-type relays, so you can replace them when they die..

06-16-13, 03:47 PM	#228
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	MTM keeps their circuit diagrams secret. I think they want to people to buy their product, instead of copying it. If you really want to use relays, there are simple circuits posted on the web.. Electronic Projects "This is about the simplest tracker I know of. It uses a Radio Shack 275-249A relay. Adjust the sensitivity of the CdS cells with a Sharpie permanent marker as described bellow, in the Chace tracker. The picture tells it all. This tracker is not as accurate as the electronic tracker but quite sufficient for use with PV panels. While the proof of concept is good it will burn the relay contacts. This is caused by the relays being turned on or off slowly. It melted the plastic case on the relays. " edit: Schematic for Solar Collector Sun Tracking, Richard Gideon shares solar technology, Phoenix Turbine Builders Club Developer of the Month Here's another relay tracker for those who fear the transistor.. This one looks pretty good. If you build one of these, be sure to use socket-type relays, so you can replace them when they die.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less.. Last edited by Xringer; 06-16-13 at 06:37 PM.. Reason: Adding jpeg