View Full Version : Controlling a peltier cooler with basic stamp 2
08-24-2005, 12:45 PM
I would like to know if there is anyone who is familliar with a thermoelectric peltier cooler, and how it can be interfaced with the basic stamp 2.· I have a seperate control module with the peltier, that cycles it on & off )I believe), and would like to use the BS2 to control it, plus a fan.· The module and peltier operate properly on +12V, and I currently run them from a computer power supply.· In the next week or so, I may post a couple of pictures of the control module that I purchased with my peltier, as it is easier to explain it, and it has no spec sheet/tech notes with it.
Post Edited (peltier_cooler32°) : 9/7/2005 4:29:11 AM GMT
08-24-2005, 07:44 PM
Well, connecting the peltier to a relay and the stamp controlling that relay is the obvious one....
Just wondering if you could control "HOW COLD" a pelletier gets with, say a PWM signal. Like in motors, the higher the PWM the faster the motor goes, slower when the PWM is lower.
I don't think you could wreck teh peltier as it's normally run on 12Vdc and you'd just be switching that 12Vdc on/off very fast (pulse width modulated -- PWM).
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08-24-2005, 08:58 PM
Yes using PWM works with peltier junctions, Thermaltake use to have a CPU cooler based on a peltier which incorporated a temperature and humidity sensor. It used the information to calculate the dew point and adjusted the PWM so that the cold side was 5 degrees above dew point, this alieviated the problem of having to insulate the junction to prevent condensation, since it intelligently made sure condensation never occured.