I want to regulate a peltier cooler. Manufacturer says they don't like to be switched on and off alot, they prefer changing input voltage. On the controller I have available a DAC output 0...2.5 VDC . What is the most elegant way to turn this into 0...14VDC at 6 amps max? Thanks-
A power MOSFET circuit would do the job nicely. You may need to drive the gate via an amplifying transistor (like a simple 2N2222) to get the voltage range you need.
BRW
I built something to control one of these things a while back. The manufacturer said that it is okay to use pulse width modulation at frequencies above 1kHz, so that's what I did and it worked fine! If you don't get any joy with an analogue solution, you could think along the lines of 555 - H-Bridge.
Good luck!
Andy
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Thanks- One of my dilemmas is that I have run out of digital output lines but have these DACs sitting idle. So I'll try that first.
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