Power Supply Circuits

The presented universal power supply circuit can be used just for anything, you can use it as a solar battery charger, bench power supply, mains battery charger circuit, or for any desired application regardless of the voltage and current range, which are extremely flexible and fully adjustable. Main Features: The mains features of this power […]

The popular LM317 voltage regulator IC is designed to deliver not more than 1.5 amps, however by adding an outboard current boost transistor to the circuit it becomes possible to upgrade the regulator circuit to handle much higher currents, and upto any desired levels. You might have already come across the 78XX fixed voltage regulator […]

Here I have explained about a simple switch mode power supply (SMPS) circuit which is capable of delivering 3.3V, 5V, 9V at around 800mA from a Mains input range of 100V to 285V, with a complete isolation. The functioning of the proposed 3.3V, 5V, 9V flyback SMPS Circuit may be understood by going through the […]

In this post I have explained regarding what’s ripple current in power supply circuits, what causes it and how it can be reduced or eliminated using smoothing capacitor. What’s Ripple in Power Supply Circuits In all AC to DC power supplies the DC output is acquired by rectifying the AC input power and filtering through […]

In this article I have explained to make a simple 12v LED backpack power supply circuit for powering a 36watt LED lamp, which includes appropriately wired integrated sockets for enabling the attachment of external devices such as a regulated battery charger, ammeter, voltmeter etc. The idea was requested by Mr.  Kevin Bates Backpack LED Charger/Driver […]