 |
| Power Supplies |
|
| There are two types of power supplies, AT and ATX. The two pictures below are ATXs. The first one has its case on and the second shows what a power supply looks likes inside. |
 |
| Power supplies basically convert AC voltages to DC voltages. 120 volts comes into the power supply unit and turns into two main wires coming out. There is the 5 volts and the 12 volts, the 5 for mainly digital circuits and the 12 for motors in disk drives and fans. There is also a 3.3 volts for CPUs. |
| The main specifications of power supplies is in watts. Voltage times Current equals watts. Current is measured in amps. |
| Side Note |
| The main difference between an AT and an ATX is that the AT has a plug for a monitor and is not as commonly used as ATXs. |
| ToubleShooting on power supplies> |
 |