hoser
SILVER Star
I don't think that would be too hard. You can download the Dan Foss BD35 wiring diagram on their site and pick up a 12V controller on eBay.
http://www.ebay.com/itm/Automatic-D...t=LH_DefaultDomain_0&var=&hash=item2570fd15eb
http://www.ebay.com/itm/DC-12V-Digi...d=100005&prg=1088&rk=3&rkt=5&sd=111221195244&
http://www.ebay.com/itm/DC-12V-Digi...884?pt=LH_DefaultDomain_0&hash=item3f2c4febe4
http://www.ebay.com/itm/Automatic-D...t=LH_DefaultDomain_0&var=&hash=item2570fd15eb
http://www.ebay.com/itm/DC-12V-Digi...d=100005&prg=1088&rk=3&rkt=5&sd=111221195244&
http://www.ebay.com/itm/DC-12V-Digi...884?pt=LH_DefaultDomain_0&hash=item3f2c4febe4