DC power supply 3-30V 3-30V 3A stabilized

DC power supply 3-30V 3-30V 3A stabilized
This DC power supply circuit diagram is designed as an additional or as a permanent power supply for all general circuits based on a stable DC voltage between 3 and 30V provided that current consumption does not exceed 3A. Of course, this DC power supply can also be used to other purposes. By replacing the trimmer by a potentiometer, it can even be used as adjustable supply unit. A good quality heatsink must be used. (more…)

Adjustable regulated power supply 3-30 V / 2.5 A

Adjustable regulated power supply 3-30 V / 2.5 A
This Adjustable regulated power supply circuit uses voltage regulator LM723 IC which are already well known. IC LM 723 is designed to provide a voltage of 2-37 volt supply voltage with 150mA current, and this current is small indeed, but with the help of an external transistor can be achieved current up to 10 A, and in this circuit can provide voltage 3-30V and is limited to 2.5 A currnt with the help of TR2. (more…)

A simple variable power supply circuit with L200

A simple variable power supply circuit with L200
Variable power Supply scheme shown here is very simple, its used regulator IC L200 (ADJUSTABLE VOLTAGE AND CURRENT REGULATOR). L200 is a monolitthic IC for current and voltage programmable regulation. It has current limiting, power limiting, thermal shutdown, and over voltage protection. (more…)

24V / 2A DC Power Supply

24V / 2A DC Power Supply
The 24 volts power supply circuit is very simple. It uses a zener diodes and Darlington transistors type TIP122. Output voltage is set at 24 V with 2 amperes current output. Lowering the voltage 230 V sector is provided by the transformer TR1, whose secondary voltage is 24 V. Available voltage after rectification and filtering is the order of 32 V to 34 V (depending on transformer and voltage). (more…)

Dual Power Supply with Soft Power Switch

Dual Power Supply with Soft Power Switch
This power supply circuit brings together a dual polarity power supply and soft power to a power transformer (to supply a large amplifier for example) on the same board. The regulator circuit is performed by a pair of 79xx and 78XX (XX = 12 to 24), if the current requirement does not exceed 200 mA, the heatsink is not needed here (but available in the printed circuit board). Tthis circuit part provides power to devices such as amplifiers (preamplifier,

Isolated Power Supply +5 V to +15 V, 500 mA

Isolated Power Supply +5 V to +15 V, 500 mA
The Isolated Power supply +5 V to +15 V, 500 mA diagram represents a single control block, knowing that all are identical. It is truly classic, and is based on the use of common components. The Isolated Power supply +5 V to +15 V, 500 mA circuit described below is a "modification" that is designed to accommodate all the modules on a single circuit board. (more…)

Single Power Supply with Soft Start

Single Power Supply with Soft Start
This  Single power supply with soft start circuit which presented here has a simple concept, small power, smooth voltage. This power supply voltage is actually used for control kit K8003 © VELLEMAN, which allows to smooth ignition the exterior halogen spotlights (500 Watt) or interior spotlights (bathroom lighting  for example), blackout is instantaneous. You must mount this circuit in the housing fully insulated and waterproof. (more…)

Dual Output Power Supply +/-53V / 3A based on Transistors

Dual Output Power Supply +/-53V / 3A based on Transistors
This is the circuit diagram of dual output power supply +/-53V / 3A based on transistors. This circuit has been designed for audio amplifier power supply requires a symmetrical + / -53 V (+ / -56 V maximum). The role of the circuit part presented here is to lower the voltage of both positive and negative lines of + / -65 V for non-hazardous + / -53 V for the amplifier, while allowing the current to 3 A in