I hope that one of you can help me constructing a simpel diagram:-)
I need to keep the temperature on a heatsink at +25 degrees celsius +/- 0.5 degrees.
It is to keep some IC chips at there optimum temperature the whole time.
If it is possible, it could be fantastic if a dual color LED could change color from i.e. green when inside the allowed temperature and maybe red when outside.
Hope that my explanation is sort of clear.