Friday, April 12, 2013
5 to 15V Regulated Power Supply Rise
This project is an ordinary DC regulated power supply that may be a variable DC voltage range from 5V to 15V. It can provide present up to 400mA to power the various circuits in your digital projects. The voltage output is different with the aid of the usage of the potentiometer V.R1. In this circuit, the enter line energy provide is designed for 240V.A.C. If 110VAC enter is used, alter the rankings of the varistor to 150VAC & the transformer ratio to 110V/12V.
![](\"http://www.electronics-project-design.com/images/RegulatedPowerSupplyCircuit.GIF\")
Fuse F1 is used as a protection in case theres any short circuit in the circuit. Varistor V1 is hooked up in parallel to the enter of the road voltage to clamp the surge voltage from the road to a cheap level that helps to offer safety to the transformer & other circuitry. One time the voltage degree surge to a excessive level past the flexibility of the varistor to absorb it, fuse F1 or varistor V1 or both will burn. If this circuit failed after a duration of operation, check that the fuse & the varistor are nonetheless in good condition or else exchange them.
Diodes D1, D2, D3 and D4 are used to rectify the 12V.A.C voltage to DC voltage. Electrolytic capacitor E1 is used as a smoothing capacitor to reduce the ripple of the DC voltage. The DC voltage is fed in to the enter of 7805 regulator the place the output DC voltage is got. Changing the value of VR1 will alter the output of the DC voltage. Capacitor C1 is used to filter excessive frequency section from the facility supply.
![](\"http://www.electronics-project-design.com/images/RegulatedPowerSupplyPartsList.GIF\")
