Dc Power Supply Circuit Diagram. What is a variable power supply. 18v dc power supply using 7818.
Variable dc power supply october 12 2010 a variable dc power supply is one of the most useful tools on the electronics hobbyist s workbench. For smaller voltages we normally use batteries as a reliable source. We ll now go over each part of this circuit and go over the role each component plays so that you can know how this circuit works in its entirety.
How can the addition of nothing but a capacitor have such a great effect on the amount of dc voltage output by the circuit.
When we create a dc power supply it creates dc voltage from the ac mains. But it still has the same characteristics as a fixed regulated power supply. A single power supply can provide as many as voltages as are required by using a voltage or potential divider as illustrated in the figure. Often more than one dc voltage is required for the operation of electronic circuits.
