Power Supply Circuit

• Electronic devices run on direct current, or DC, in which electricity flows in one direction and at a fixed voltage. Electricity in a household AC outlet flows rapidly back and forth at 60 hz. A power supply solves this problem by converting AC to DC. In the power supply circuit, capacitors remove electrical noise, providing cleaner power to the device it powers. Capacitors work by storing electric charges; they can retain a voltage long after disconnection from the AC outlet. If you touch the capacitor's terminals, the stored voltage will pass through your skin, giving you a shock.