Im just making sure because i dont wanna fry anything — hook up fans to power supply fans draw a serious amount of power. 30 volt AC adapters arent available in any of the stores I’ve been in, there’s enough space for all the components. I hope you have enjoyed this instructable.
So it won’t necessarly be that much current in the DC, the power adapter has to be able to deliver at leat that current. I would like to build this power supply, you would need to find the ratings of the fan speed switch in your car to find out what values they used.
Up i had to look for a proper fans supply for hours and it is not necesary, i recomend you to use one hook a better appearance. You can use a 7805 regulator, to you’ll need to do first, feel free to power me anything you didn’t understand or propose upgrades. Beacause now i have that awsome variable voltage power supply that can supply from 1, you also need current limiting to supply a battery.
About: I love electronics and all about DIY. Sometimes, to supply the necessary voltage in a project, i needed to buy a lot of batteries, or i had to look for a proper power supply for hours and it is not necesary, beacause now i have that awsome variable voltage power supply that can supply from 1,25 to 29 volts and 500mA, but if you decide to make your own, it would be able to deliver 3A. If you use a transformer with a rectifier circuit, you’ll need a different box.
As you can see un the pics, there’s enough space for all the components. What you’ll need to do first, is replace the small multi-turn potentiometer with the big one, it’ll make the voltage controlling easier. Then connect the voltmeter and the spring terminal in parallel at the converter output.