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September 30, 2010
Here is the circuit diagram of regulated power supply. It is a small power supply that provides a regulated voltage, adjustable between 1.5 and 35 volts at 1 ampere. This circuit is ready to use,... [more]
circuit from:http://www.extremecircuits.net/2009/10/easy-way-to-power-your-projects-here-is.html
October 13, 2010
The circuit will give us 10 amps (12 amps surge) with performance that equals or exceeds any commercial unit. The circuit even has a current limiting feature which is a more reliable system than most... [more]
August 4, 2010
In this small switching power supply, a Schmitt trigger oscillator is used to drive a switching transistor that supplies current to a small inductor. Energy is stored in the inductor while the transistor is on,... [more]
August 4, 2010
This power supply is meant as an auxiliary or as a permanent power supply for all common circuits based on a stabilized DC voltage between 3 and 30V provided that the consumption does not exceed... [more]
circuit from:http://www.extremecircuits.net/2010/02/3-30v-3a-adjustable-regulated-dc-power.html
September 30, 2010
48 V ‘phantom’ powering has become the standard for professional condenser microphones. The supply (or rather bias) voltage is applied over both wires of the balanced screened cable via two 6k8 resistors (see reference [1])... [more]
circuit from:http://www.extremecircuits.net/2010/05/48v-phantom-microphone-power-supply.html
September 30, 2010
This circuit is a small +5V power supply, which is useful when experimenting with digital electronics. Small inexpensive wall tranformers with variable output voltage are available from any electronics shop and supermarket. Those transformers are... [more]
circuit from:http://www.extremecircuits.net/2010/01/5v-regulated-power-supply-circuit.html
August 4, 2010
There is little to be said about this circuit. All the work is done by the regulator. The 7809 can deliver up to 2 amps continuous output whilst maintaining a low noise and very well... [more]
circuit from:http://www.extremecircuits.net/2010/03/9-volt-2-ampere-dc-regulated-power.html
August 4, 2010
This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluable when (for example) you power-up a... [more]
April 11, 2010
This circuit will supply up to about 20ma at 12 volts. It uses capacitive reactance instead of resistance - so it doesn't generate very much heat. The circuit was designed to provide a cheap, compact... [more]
August 4, 2010
Want a regulated voltage that can be adjusted to suit your application? This Adjustable Power Supply is small, easy to build and can be adapted to produce a fully regulated voltage ranging from 1.3V to... [more]
circuit from:http://www.extremecircuits.net/2010/02/adjustable-13-22v-regulated-power.html
August 4, 2010
This current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with any dual-rail current source. The part of the circuit to the left... [more]
circuit from:http://www.extremecircuits.net/2010/05/adjustable-current-limit-for-dual-power.html
August 4, 2010
This is the voltage converter to get the voltage of ±1,25-30V from the input voltage of ±35V. I am using the 3 terminal voltage regulator for the voltage to be changed in this unit. [more]
October 3, 2010
Readers who do not care to modify the power supply of an old PC into a suitable halogen power source (see our April 2006 issue), may find the present design a welcome alternative. The circuit... [more]
circuit from:http://www.extremecircuits.net/2010/05/alternative-halogen-power-supply.html
August 4, 2010
This Power Supply is suitable for the Modular Burglar Alarm. However, it has other applications. It is designed to provide an output of 12-volts, with a current of up to 1-amp. In the event of... [more]
June 22, 2010
This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of electrical supply line failure the battery... [more]
November 2, 2010
This dual polarity power supply is easy to build, requires few parts, and is adjustable from 0-15 volts. It is great for powering op amp circuits, as well as other circuits that require a dual... [more]
September 30, 2010
This simple unit provides a dual-rail variable output ranging from ±2.5V to ±15Vdc with precise tracking of the positive and negative output voltages, still retaining the current limiting and short-proof capabilities of the "master" circuit.... [more]
April 24, 2010
The power supply, with electronic stabilisation - mainly those of laboratories - it should they are protected from over current that emanates from short-circuits, erroneous association or damage of repaired appliance. [more]
October 20, 2010
The fixed voltage power supply is useful in applications where an adjustable output is not required. This supply is simple, but very flexable as the voltage it outputs is dependant only on the regulator and... [more]
December 2, 2010
A truly timeless circuit. LM317 is a versatile and highly efficient 1.2-37V voltage regulator that can provide up to 1.5A of current with a large heat sink. It's ideal for just about any application. This... [more]
April 24, 2010
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... [more]
August 4, 2010
Many times we needed a stabilized, together regulated power supply and high relatively output voltage. These specifications him it cover our circuit. It 's a circuit that can give in his exit + 40V until... [more]
August 4, 2010
This circuit of power supply, are very simple in the manufacture, the finding of his materials , is very easy and cost, small. The output voltage is stabilised and is regulated in the region from... [more]
April 24, 2010
The basic requirements than one laboratorial power supply, it is to provide voltages and currents of operation that need the usual units, to have low output resistance, low noise, small ripple and good stabilisation. [more]
August 4, 2010
It is a simple circuit regulated power supply, based on the known LM 723, that drive a transistor Q1 [2N3055]. The regulation of voltage, of expense becomes with potentiometer R1 from 0v-30v DC roughly. In... [more]
August 4, 2010
This power supply was designed for use with the ‘Simple hybrid amp’ published elsewhere in this issue. It is of course suitable for use in other applications as well. We’ve used a cascade generator for... [more]
circuit from:http://www.extremecircuits.net/2010/05/quad-power-supply-for-hybrid-amplifier.html
August 4, 2010
This circuit of power supply, is very simple and easy to built, it can be assembled on a general-purpose PCB, finding its materials is very easy and cost-small. The output voltage is stabilized and is... [more]
circuit from:http://www.extremecircuits.net/2009/07/stabilized-power-supply-circuit.html
August 4, 2010
Here is an efficient 4-stage stabilised power supply unit for testing electronic circuits. It provides well regulated and stabilised output, which is essential for most electronic circuits to give proper results. The circuit provides an... [more]
circuit from:http://www.extremecircuits.net/2010/05/stablised-power-supply-with-short.html
August 4, 2010
An increasing number of appliances draw a very small current from the power supply. If you need to design a mains powered device, you could generally choose between a linear and a switch-mode power supply.... [more]
circuit from:http://www.extremecircuits.net/2010/05/transformerless-5-volt-power-supply.html
October 12, 2010
This supply uses no heavy step down transformer and has an extremely low parts count. The circuit can be built very small and can supply small currents for small projects. The major downfall of this... [more]
October 12, 2010
Power supplies that are intended to be used with TTL logic circuitry must guard against over-voltage, which can destroy TTL chips very rapidly. The duration of over-voltage that can destroy TTL chips is much too... [more]
August 4, 2010
This regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current... [more]
October 12, 2010
A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist's workbench. This circuit is not an absolute novelty, but it's simple, reliable, "rugged" and short-proof, featuring variable voltage up... [more]
August 4, 2010
This circuit is not an absolute novelty, but it is simple, reliable, "rugged" and short-proof, featuring variable voltage up to 24V and variable current limiting up to 2A. You can adapt it to your own... [more]
circuit from:http://www.extremecircuits.net/2009/06/variable-dc-power-supply.html
August 4, 2010
Another method of using opamps to regulate a power supply is shown. The power transformer requires an additional winding to supply the op-amps with a bipolar voltage (+/- 8 volts), and the negative voltage is... [more]
June 22, 2010
Simple and low cost. The optimal supply voltage is around 50V, but this amp work from 30 to 60V. [more]
August 5, 2010
The Power Amplifier section employs only three transistors and a handful of resistors and capacitors in a shunt feedback configuration but can deliver more than 18W into 8 Ohm with 0.08% THD @ 1KHz at... [more]
circuit from:http://www.extremecircuits.net/2009/12/30-watt-audio-power-amplifier-schematic.html
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