If you connect the 12Vdc and -12Vdc on a desktop PSU do you get 24 Volts?

I used to understand more about electricity and electronics, i swear. I have used the yellow-to-red (+12 to +5 Vdc) method to create 7 volt dc connections for my desktop and xbox fans. I understand the concept of differences in voltage. Do these concepts carry over into negative voltage available on the ATX power supplies?

Question by Andale_The_Great   |  last reply


How to use a transformer to step-up voltage

Hello! I was wondering how to use a transformer to step-up volage. I got one of those shocker fly swatters and took it apart, and saw that it used a couple of transistors, capacitors, and the main thing, the small 5-pin transformer. How does it work? How can I increase the voltage? 

Topic by HavocRC   |  last reply


How do I regulate voltage in my power supply? Answered

I'm a beginner so pleaase deal with me. I'am building a AC-DC power supply. The transformer I'm using has an output of 12.6V and 3A. I used a full-wave rectifier to turn AC into DC. Now I need a way to regulate the power supply's output voltage. I did some research but I'm still not sure what I should do. I could use a potentiometer, or substitude one of the resistors in a voltage resistor for a potentimeter ... whats the difference? If I do use a potentiometer  how do i choose which one I need? Do I use an adjustable volage regulator?The load Ill mostly use it for requires 2.3A and a voltage of 3-12.6V. But I want the freedom of using it for other stuff. Also, in what way can I regulate the current? Sorry for all the questions, Im just confused after everything Ive read online.

Question by AnibalP   |  last reply