short question:
Do you think it's possible to just plug in two 12V/800mA Power Supplies into a breadboard in order to double voltage and amper? Does this work at all?
Thing is that i want to drive a motor which needs 24V and I only have two 12V supplies here at the moment.
No you only double the voltage by putting two supplies in series. Supplies in parallel are a lot more problematical but that would keep the voltage the same but double the current.