well ... so did Zomeworks .... 20 years or more ago

---
cheers ... 73 de brian  riley,  n1bq , underhill center, vermont
   <http://web.mac.com/brianbr/>  Tech Blog
   <http://www.wulfden.org/TheShoppe.shtml>
    Home of the
       K107 Serial LCD Controller Kit   FT817 Power Conditioner Kit
       Tab Robot Laser Tag Kit            MSP430 Chips and Connectors
       Propeller Robot Controller         SX48 "Tech Board" Kit



On Apr 11, 2007, at 9:48 AM, Alan B. Pearce wrote:

>> "It is a new type of 'passive' solar tracker
>
> hah, I have a copy of Mother Earth News magazine that described using
> exactly that principle to move a solar water heater tube set, back  
> in the
> mid 1980's IIRC. He does seem to have made a nice commercial job of it
> though.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist