This universal power supply contains, beside the bridge rectifier, a voltage stabilizer (78xx) and a pnp power transistor. This combination allow a load current up to 5 A. As you know a voltage stabilizer in a TO-220 package can deliver up to 1A. The additional power transistor takes the load current of about 200mA.

This overvoltage protection or crowbar protection circuit is used where we need protection against high voltage surge. The circuit has a few components, it is very easy to build and will protect your electric equipment againg overvoltages. The crowbar circuit must be mounted between power supply and the protected device.

Useful for electronics hobbyists, this linear workbench desktop power supply circuit converts a high input voltage (12V) from the SMPS of a PC into low output voltage (1.25 to 9 volts). An adjustable three-pin voltage regulator chip LM317T (IC1) is used here to provide the required voltages. The LM317T regulator, in TO-220 pack, can handle current of up to 1 amp in practice.

d2 Hard Drive Lacie power supply info and reviews for d2 Hard Drive. Lacie is well known for their External hard drives, external, raid and network hard drive and therefore sometimes we need to buy a power supply.

A computer power supply is built with a power supply unit (PSU) which is the component that supplies power to a computer. More specifically, a computer power supply is typically designed to convert 100-120 V (North America and Japan) or 220-240 V (Europe, South America, Africa, Asia and Australia) AC power from the mains to usable low-voltage DC power for the internal components of the computer, usually 12 volts and 5 volts dc pins. Some power supplies have a switch to change between 230 V and 115 V and some high efficiency computer power supply models have automatic sensors that switch input voltage automatically, or are able to accept any voltage between those limits.