This one is to try to help a retired mate.
He builds bird brooder boxes to earn some very much needed extra cash.
The boxes are constructed from plywood and he makes them in 6 sizes. They are designed to be either plugged into 240v or used in the car with an inverter. Up till now, he has used heaters of various types, lamps, elements etc. Now he's trying to create a fully portable 12v model using a peltier device, so that it will heat in winter and cool in summer(or in a hot car). He is controlling the peltier with an electronic thermostat.
The problem is : The peltier will heat quite well but on cooling, the temp will not drop any more than about 2 deg. below ambient. It should be able to freeze moisture on the cold side.
The peltier is sandwiched between 2 processor heatsinks, with a fan on the hot side.
Heating or cooling is achieved by the direction of current flow. I have checked it and he has wired it correctly.
Does anyone have any experience with these here peltiers ?
Meatpie