links PS

http://electroschematics.blogspot.com/2012/04/most-power-supply-for-amplifier.html

Standard Power Supply

Power supply

As with most power amplifiers, the ±60 V power supply need not be regulated. Owing to the relatively high power output, the supply needs a fairly large mains transformer and corresponding smoothing capacitors—see circuit diagram below.

Note that the supply shown is for a mono amplifier; a stereo outfit needs two supplies. 

The power supply is straightforward, but can handle a large current. Voltage 'ac'serves as drive for the power-on delay circuit. The transformer is a 625 VA type, and the smoothing capacitors are 10 000 µF, 100 V electrolytic types. The bridge rectifier needs to be mounted on a suitable heat sink or be mounted directly on the bottom cover of the metal enclosure.. The transformer needs two secondary windings, providing 42.5 V each. The prototype used a toroidal transformer with 2x40 V secondaries. The secondary winding of this type of transformer is easily extended: in the prototype 4 turns were added and this gave secondaries of 2x42.5 V.

6VDC to 12VDC Power Supply Inverter

This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example, you could run 12V car accessories in a 6V (British?) car. The circuit is simple, about 75% efficient and quite useful. By changing just a few components, you can also modify it for different voltages.

Part List:

R1, R4 2.2K 1/4W Resistor

R2, R3 4.7K 1/4W Resistor

R5 1K 1/4W Resistor

R6 1.5K 1/4W Resistor

R7 33K 1/4W Resistor

R8 10K 1/4W Resistor

C1,C2 0.1uF Ceramic Disc Capacitor

C3 470uF 25V Electrolytic Capcitor

D1 1N914 Diode

D2 1N4004 Diode

D3 12V 400mW Zener Diode

Q1, Q2, Q4 BC547 NPN Transistor

Q3 BD679 NPN Transistor

L1 See Notes

MISC Heatsink For Q3, Binding Posts (For Input/Output), Wire, Board

Power Supply adjustable 1.3V - 12.2V 1A

Power supply circuit to generate output below were variations between 1.3V DC to 12.2V DC with 1A current.
In addition, the power supply circuit is also equipped with over-current protection or shield against belebih flow. Power supply circuit is very simple, but the quality is quite good, made her basiskan regulator IC LM723 is a pretty legendary.

Description:
R2 to set the output voltage. The maximum current is determined by R3, over-current protection circuit inside the LM723 to detect the voltage on R3, if it reaches 0.65 V, the voltage output will be off her. So the current through R3 can not exceed 0.65 / R3 although output short-circuit in his.

C3 and C4 are ceramic capacitors, as much as possible directly soldered to the PCB, this is because the LM723 is prone to oscillation that is not cool.

LM723 works with 9.5V input voltage to 40 V DC and the LM723 can generate its own current of 150mA when the output voltage is not more than 6-7V under input voltage.

Specifications:
Output (value estimated):

Vmin = (R4 + R5) / (R5 * 1.3)
Vmax = (7.15 / R5) * (R4 + R5)

Imax = 0.65/R3

Max. Power on R3: 0.42/R3

Min. DC Input Voltage (pin 12 to pin 7): Vmax + 5

Component List:
B1 40V/2.5A
C1 2200uF (3300uF even better)
C2 4.7uF
C3 100nF
C4 1NF
C5 330nF
C6 100uF
Green LED D1
D2 1N4003
F1 0.2A F
F2 2A M
IC1 LM723 (in a DIL14 plastic package)
R1 1k
R2 Pot. 5k
R3 0.56R/2W

R4 3.3k
R5 4.7k
S1 250V/1A
T1 2N3055 on a heatsink 5K / W
TR1 220V/17V/1.5

5V output Switching Power Supply

The switching regulator power supply used LM2575-5.0 on this schematic.
You can make the stable voltage by using the 3 terminal regulator like LM317. However, because the output electric current and the inputted electric current are the same approximately, the difference between the input electric power (The input voltage x The input electric current) and the output power (The output voltage x The output current) is consumed as the heat with the regulator. Because it is, the efficiency isnot good.

Data sheet for LM2575

SIMPLE SWITCHER 1A Step-Down Voltage Regulator

Save Electricity circuit

Do you know how to work his usual power saving devices in the market is shaped like a dry battery with a plug into an outlet?. Actually you can create your own tool with much better quality with much cheaper price.



Because of the way it works is to reduce the magnitude from cosine curve AC current that will be read on the gauge kilometer. Device work if there is air conditioning load passes through a coil of wire sensors to measure the AC current which is being passed.

Power Saver Circuit

A very influential component in the AC circuit is a capacitor and inductor. Therefore we need to filter the AC current before it enters our home electricity network. Obviously we did not perform the act of theft of electricity, and this tool will not be detected by the device are as follows . How to installation, Here I would include a scheme of the circuit which will be installed close to the mile. The closer, the more optimal the way it works, use good quality capacitors, for security MCB here, serves to prevent the occurrence of shorting out due to damage to the capacitor. Then Enter in box or plastic box which is strong enough. Better capacitor in the cast by GIP's or cement, so that power is wasted heat well.

Power Supply no transformer using IC and MOSFET

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Pulsating DC voltage from rectifier D1 - D4 has a peak value 310 V This voltage is supplied to the spout of the power MOSFET T1 through a resistor divider R9. A control circuit ensures MOSFET will only deliver a short dive before and after the voltage through zero meshes. During this time do not go too far pulsating DC voltage 5 V. In a short time the same grading Capacitor C2 will be too fit, long time thereafter he gives the output current. Capacitor result should be worth a very large 10,000 μF. Load current pulses in a short time has a price peak in the 4th order A!

Schematics MOSFET use BUZ74 and IC CA3130E

Output voltage stability essentially depends on the load. Maximum output current can be 110 mA. Supply for control circuit is obtained from the resistor R2., Capacitor C1 and the diodes D5 and D6. Control circuit is formed penanding window of three op-amp. The correct calibration of the controlling circuit becomes very important. Before the nets are given, first set the P1 in the middle position and turn the S2 until penggesernya are on earth potential. Then connect the nets and inspect the working voltage range. Next connect a voltmeter (10V DC range) on the output and adjust P2 until the meter begins to deviate. Finally, set P1 for meter reading 4.8 - 5 V.

Use of this circuit is limited. Obviously, can not be used with equipment that must be electrically insulated by the nets. It is also equally good when used with equipment which is very sensitive to sigh and nails nets. But good enough for the equipment that is not enough place to net transformer. This unit should be used to power the equipment that was placed in a plastic container. Any equipment that is powered by this circuit should not be connected to other equipment via a cable. If required to do must be done through optical coupling only.

The amount of heat dissipation at T1 and R9 only around 3 W. So if this rangkian installed in small contacts, there would be no problem with the heat. During the assembly, carefully observe first-prevention precautions are necessary in connection with a circuit that works with the nets.

Warning! This circuit needs to be made with extreme caution, because the nets full voltage there at some point.

Simple Power Supply Transformerless

 

This circuit has a voltage output of about 12 volts with 20mA current voltage. And this series of works using capacitive reactance and resistance are not using, this will reduce the heat on the circuit.


To be safe when there is a short-circuit series, always use a fuse on the input voltage is 220V. Here is a series of power supply without a simple transfomer.

Part List
R1 - 1.8K 1W
R2 - 100Ω
C1 - 0.47µF 400V
C2 - 1000µF 50V
D1 - 1N4007
D2 - 1N4007
D3 - 1N4007
D4 - 1N4007
ZD1 - 16V Zener Diode
ZD2 - 16V Zener Diode
ZD3 - 12V Zener Diode