Hello,
I have a PC that had a fan go out. The fan is 5V. I cannot find a replacement (Foxconn proprietary). I found a 12V Fan & Heat-sink that work better than the original. My issue is, there is no 12V in the box at all. It is laptop components and does not require 12V. The best I have is 5V and 3.3V. Coming in from the power supply is 19.8V which is promising. I figured I would just use a votage regulator to lower it to 12V. I tried a 7812 but on futher inspection, I think it requires 35V. I was hoping 35V was the max and it would output 12V anyway. There is nothing else in the circuit. It just goes 19.8V to the input and no caps or resistors. Sorry, I'm a Noob.
So, I am turning to you guys for help. I think the best route would be to voltage drop or regulate it, but I don't know how. I am good at following instructions and soldering, but my knowledge is not there. Keep in mind the space inside the case is at a premium. The heatsink for the TO-220 casing had to be squished to fit.
I have a PC that had a fan go out. The fan is 5V. I cannot find a replacement (Foxconn proprietary). I found a 12V Fan & Heat-sink that work better than the original. My issue is, there is no 12V in the box at all. It is laptop components and does not require 12V. The best I have is 5V and 3.3V. Coming in from the power supply is 19.8V which is promising. I figured I would just use a votage regulator to lower it to 12V. I tried a 7812 but on futher inspection, I think it requires 35V. I was hoping 35V was the max and it would output 12V anyway. There is nothing else in the circuit. It just goes 19.8V to the input and no caps or resistors. Sorry, I'm a Noob.
So, I am turning to you guys for help. I think the best route would be to voltage drop or regulate it, but I don't know how. I am good at following instructions and soldering, but my knowledge is not there. Keep in mind the space inside the case is at a premium. The heatsink for the TO-220 casing had to be squished to fit.