battery chargers circuits | Next Electronics

A common requirement in many systems is to obtain both positive and negative supplies from a single battery. For applications with small current needs, the circuit illustrated provides a straightforward solution. It generates symmetrical output voltages of ±, each equal...

Mobile voltage regulator

This simple mobile voltage regulator circuit may save your two-meter or CB transceiver if the voltage regulator fails. The 2N3055 should be heat-sinked if the current drawn by the rig exceeds 2 A during transmission. This circuit will do little...

Application Circuit CW4960 CW4962 dual voltage + 5V 1.5A -12V 100mA output

The circuit described is a stabilized power supply utilizing the CW4962 and CW4960 components, providing +5V at 1.5A and -12V at 100mA. The +5V output serves as the main power supply. The output circuit employs a transformer rather than an...

Switching Voltage Regulators-Step up Step down and polarity invert

Switching voltage regulators include step-up, step-down, and polarity-inverting configurations, along with their working principles and circuit diagrams. Switching voltage regulators are essential components in modern electronic circuits, providing efficient voltage conversion. These regulators can be categorized into three main types: step-up...

One Amp Battery Charger

When this battery charger was purchased in 1970, it was not anticipated that it would still be relevant today. At that time, the owner had an old car with a weak battery that struggled to start in cold weather, prompting...

Power supply +20V/15A and +12V/3A

The circuit is based on application of National Semiconductor. First is constituted by three voltage regulators LM338 [IC1-2-3] connected in parallel. The each one regulator has the possibility of giving 5 A in his output. Also exists the possibility to...

12 Volt 30 Amp PSU

Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 30 amps. The input transformer is likely to be the most expensive part of the entire project....

Voltage Regulator Calculation

Before designing an adjustable voltage regulator into a circuit or performing a redesign, it is essential to calculate the values for two resistors. While this calculation is straightforward, locating the appropriate resistors may present challenges. Fortunately, a technique exists to...

ic-7805 based 5V breadboard mini PSU circuit with explanation

A micro power supply unit (PSU) is designed to power a breadboard with a voltage output of 5 volts. It can be connected to a 9V battery, a 12V source, or any other direct current (DC) power supply ranging from...