Running incubator fans

[Pythonfriend]

10 amps is a lot at 12 volts, it will give you an output of 120 watts maximum.

a brushless fan like you use in a computer to cool the hardware, or like the ones you use, only need around 3 watts. (this is also why the low-voltage DC fans dont produce much heat). its weird that the cellphone charger didnt deliver enough.

but it doesnt really matter, it can be bigger, as long as the voltage is constant it will be fine.

personally i think i would do it using USB. there are a variety of USB fans, and a decent active USB hub will provide 5 volts at 0.5 amps or 0.75 amps for each port. thats 2.5 or 3.75 watts, which is just perfect for a small fan. most of them have 4 ports, so it would work for 4 fans. you dont even need an active USB hub because you wont need the data link, so one of these things that just gives you powered USB ports without a datalink would work. but i guess one of the reasons why i would do it this way is because i have plenty of USB hubs and cables and im familiar with the technology. and you have the 12 volt stuff and are more familiar with that.

one thing i noticed: i would position the fans differently, so that the whole air inside will be rotating. if you put both in the back, the air in the back will move down and the air in the front will move up. but you have one in the back on the left side and one in the opposite corner, so further down in the incubator they might be cancelling each other out. maybe it will be better if you move one, so that both are in the back, you should give it a try.