A regulated power supply is vital for any electronic appliance because the semiconductor devices used in them have precise current and voltage ratings. Any [[wysiwyg_imageupload::]]deviation from these rating can damage the devices. This circuit supplies a constant DC output derived from the AC mains supply. This project is an improvement over the power supply circuit mentioned earlier. The unregulated DC output is fixed to a constant voltage level by using a voltage regulator. This circuit uses a 7805 linear voltage regulator, capacitors and resistors along with a diode derived bridge rectifier. From providing a fixed voltage supply to making sure that output reaches undisturbed to the device, the diodes and capacitors manage high efficient signal conveyal.