| Power Supply Transformer |
Most electronic circuits need a DC supply such as a battery to power them and the main supply is AC it has to be converted to DC to be useful in electronics. This is what a power supply transformer does. First the AC mains supply passes through an isolating switch and safety fuse before it enters the power supply transformerunit.
In most cases the high voltage mains supply is too high for the electronic circuitry.
It is therefore stepped down to a lower value by means of a power supply transformer.
The mains voltage can be stepped up where high DC voltages are required by a power supply transformer.
From the power supply transformer the AC voltage is fed to a rectifier circuit consisting of one or more diodes. The rectifier converts AC voltage to DC voltage. The power supply transformer is essential to this process.
