So basically, I want to connect a small Peltier cell to an Arduino. I know that Peltiers are very inefficient and require large amounts of power in general but I only need to create a small temperature change. Anyways, I tried connecting it directly but the amount of current I get from one pin is too little.
I was wondering what would happen if I connected, say, 5 pins as parallel connections on a breadboard. Theoretically, if each pin is giving me 40mA, I should get an output of 200mA. Is this logic correct? Furthermore, if this is true, would I have to worry about reverse current spikes damaging the Arduino?