Hello,
I would like to fabricate a PIC, (16F84 or similar as I have several of them!) circuit that would do the following:
1. Take two temperature readings, say A & B - at 1 or 2 second intervals or a practical period of time, create a log, and provide two corresponding digital readouts for visual checking.
2. A, being ambient air temperature and B, being temperature of an aluminium housing.
3. Compare the two readings - if reading B is higher than A by more than a specific tolerance, activate a peltier or fan for such a period of time as needed so as to bring the temperature of B to within the same temperature as A +/- 1% if practical.
I would imagine some sort of "fuzzy logic" may be required to prevent the peltier or fan from going on and off all the time, although i may be wrong with this regard, my knowledge of electronic design is limited and non existant for PIC programming, but I have made many AM & FM radios and the like in the past.
Any assistance and guidance would be greatly appreciated.
Many thanks