DIY your own power supply
There are different types of power supplies present in the market. Depending upon the need and the type of equipment being used, one can select from the varieties of power supplies. But we are actually fed up with the quality of such supplies as most of them stop working after a without any prior indication.
This tutorial by one of the members of roboVITics explains how to build your own power supply. Once one will have an understanding of its working, it is easy to rearrange its circuit or modify your old power supply. All you need is copper wires, step Down Transformer, Silica Diodes, Capacitor, Voltage regulator, Adapter jack, LED, Resistor etc.
Based on the above circuit diagram, the power supply is build where AC mains are transferred to the transformer and the desired voltage is accordingly brought down. Further, bridge rectifier which is responsible for converting AC voltage into a DC output, follows the transformer. Make sure to plan the layout of the circuit before soldering the parts onto the PCB as it helps in saving space and lesser errors while soldering.
With the help of a filtering capacitor, bridge rectifier is directly fed into the input of the voltage regulator. The voltage regulator has a common pin or the Pin 2 and the output or Pin 3which is grounded and filtered by a capacitor respectively. After this output is taken from the Pin 3. In case, you want your device, brought from the market, to power up, then Power supply output is to be soldered to an adapter jack, which is dependent on the nature of your device.
For a self-made circuit or device, it can be powered up by running the output wires of supply into the circuit directly. For beginners, try circuits and soldering set up on a breadboard first, verify the connections and once approved, transfer this circuit onto a PCB and solder. Also, play safe with AC mains and voltage regulator as one can burn the device with extra volts.
Check out the following link for video along with diagrams and for better explanation of the process of making power supply.
Filed Under: Reviews