Electronics is the branch of science and technology which makes use of the controlled motion of electrons through different media and vacuum. In this course you will be able to make electronic devices and components. An AC DC Power Supply is one of the devices that we had as our project. What is a power supply?A power supply could be something as simple as a 9v battery or it could be as complex as a precision laboratory power supply.
Terms and materials to remember:
*Rectifier-is an electrical device that converts alternating current (AC) to direct current (DC), a process known as rectification.
*Capacitor- is a passive electronic component consisting of a pair of conductors separated by a dielectric (insulator).
*Transformer- is a device that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer's coils.
This is a very basic unregulated dc power supply. The ac from the transformer secondary is rectified by a bridge rectifier D1 to D4 which may also be a block rectifier such as WO4 or even four individual diode such as 1N4004 types. The principal advantage of a bridge rectifier is you do not need a center tap on the secondary of the transformer. A further but significant advantage is that the ripple frequency at the output is twice the line frequency (i.e. 50 Hz or 60 Hz) and makes filtering somewhat easier.
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