I will take care that there will no any contact between the wires on the rear of the unit.The final setup will be in a grounded metal box and I will use fuses too. I want to be sure everything works before start to cut into the metal.It is not clear what can I use as 12V additional power supply. Can you post any example of such unit?
the heater is very small: Silicon Heater Mat, 1.25 W, 25 x 50mm, 12 V dc. I need to build a small incubator that goes up to 30 C, it must heat around +8 C compared to room temperature. The heater will be placed in a polystyrene box.If not enough powerful, I might add a recepticle and use a heating cable. I think that 15W should be enough.I have a universal power supply that goes up to 12V, I might also check for other charger. Shell I just cut the wires and connect them as you described?What about the A of the internal Relay? Are 3A just enough for my application?
Where do you suggest to add the fuses? Main and the 12 volt too?
Thank you again. The power supply goes up to 1A. My Messor capitatus ant queens thank you as well. I let you know how it goes.