Thanks dc42. I admire your patience. I've been barking up the wrong tree, overly concerned about the mosfet spikes. All points taken, answering a number of questions and reaffirming what you have emphasised earlier. Unfortunately, Every Circuit comes with a limited set of components, which makes it necessary to improvise at times - not very helpful.
I wonder, What the results of an "Improvised Simulation" would be called?
Bob
I wonder, after having read the reference about voltage control if it be wouldn't easier to use a triac in a phase controlled switch or motor speed control in the secondary of a linear type Peltier power supply.
I would think that it shouldn't be hard to use an optoisolator to allow mains control of the primary...
Bob
Tried a second emulator. No Schottky diode? Not to worry, will be sure to use one, if necessary with this snubber network?
Different results between the two simulators, so settled on the one below. A bit more setting up and the two produce similar outputs in this configuration. Decided to use the rcd snubbers after all. The mosfet output, using the simulator below was erratic - the snubbers cleaned it up and similar results from both sims.
12v supply on the TEC side is flat now, whereas it was spikey - the 10000uf cap across the supply?
dc42... many thanks.
