Solar Heating or Greenhouse Differential Controllers
A differential controller monitors two temperature probes, and turns on fans or pumps accordingly. Here is an inexpensive kit so you can build your own:
Basic Differential Controller Kit
Related posts:
- The 2 Liter Bottle Greenhouse
- Basic Stamp Adventures
- Free heat from our Solar Window Heater
- Solar Upgrade Progress
- Building a solar array at woodhenge.org
