wasyoungonce
Registered User
wasyoungonc , I've not opened up the files yet but thanks for posting this. I want to look and see what I can learn.
AndrewJ, I'd pondered options for putting the switching components at the heater strap. I did some investigation of other 1-wire devices to see if there was a neat way to control PWM from one while using a central controller (not found it yet).
In the end I decided it was complicating things and giving little benefit for what I was trying to achieve. In hindsight I probably could have put an ATTiny45 (or similar) at each heater strap with a voltage regulator, a temp sensor and fet in a fairly small package. Add a pot to the mix and you could have a compact fully contained dew controller in each strap. I've not explored that yet but for an idea of what can be done with 8pin Micro this looked interesting
http://www.circuitlake.com/usb-wirel...ty-sensor.html . There might even still be a line or two left to communicate back to a central controller (humidity sensing, display etc) if required. Lot's of options left to learn and play.
Bob