HFD Series Power Supply

The power that you have in a residential outlet is usually 120V AC. When you plug your computer into an outlet in your home or office, the computer cannot run on pure AC power. The HFD series switching power supply takes the 120V AC power and reduces it with a transformer down to 5V or 12V AC. A process called rectification transforms this AC power into DC power. Your PC uses this DC power to function. The power supply adjusts the DC power based on the consumption of the device connected to it. When the PC isn't consuming a lot of power, the power supply readjusts itself to deliver less current, making the transformer and all other components dissipate less power which in turn generates less heat. Heat is a killer to PC components like the CPU and the hard drive. The less heat generated, the less wear and tear on your PC and its components. By converting the AC power to DC, smaller components such as transformers can be used instead of the much larger ones that would be required for reducing the AC to an acceptable level to run the computer.
The HFD series is a 145W Dual output switching power supply that converts 120AC to 5v and 12V. It can be purchased from Daitron, Inc. 568 E. Weddell Dr. Ste. #8 Sunnyvale, CA. This company is a subsidiary of Daito Electron Co., Ltd. of Japan where the power supplies are manufactured. The approximate cost is $188.00.