Wiring Material: power

Showing posts with label power. Show all posts

Showing posts with label power. Show all posts

Wednesday, November 19, 2014

1000Watt Audio Power Amplifier Blazer Circuit

1000Watt Audio Power Amplifier Blazer Circuit

This is a audio power amplifier Blazer circuit provides up to 1000Watt . This fascinating routes several sensible bass and treble alive. Importantly ought to opt for Power offer supply, that has been fairly high voltage category 70Vdc GND -70V 10A is that the current low level.

The transistors are 2SC3858 (NPN) and 2SA1494 (PNP), and have high bandwidth, wonderful safe operating space, high linearity and high gain. Driver transistors are 2SC5200 (NPN) and 2SA1943 (PNP). All devices are rated at 230V, with the facility transistors having a 150W dissipation and also the drivers are 50W.

This circuit describes an amplifier, power offer and tests procedures that are all inherently dangerous. Nothing described during this article ought to even be thought-about unless youre totally experienced, grasp specifically what youre doing, and are willing to require full 100% responsibility for what you are doing. There are aspects of the look which will need analysis, fault-finding and/or modification.

Monday, November 17, 2014

High Power Audio Amplifier 2800W

Mono high power amplifier is actually a powerful 1400 W, but if this hihgh power amplifier circuit is doubled and you want to create stereo, high power amplifier the necessary components and pcb requires two-fold. So if the stereo high power amplifier 2 X 1400W. Schematic Circuit diagram is still less by looking at the circuit that was so below, the finished circuit has been added with a gains using JRC4558 IC by the two and the picture ic where it can be seen below. For circuit buffers, drivers, and booster use multiple transistors and other components (can be seen listed component). And high power amplifier project that is so below is just part of the buffer and driver while the booster has not been made. For additional transistors in the booster or high power amplifier end scheme can be found Booster output power amplifier.

Click schematic to view larger

Part List :

Resistor

R1_____560Ω
R2_____100Ω
R3_____2K2Ω
R4_____560Ω
R5_____1Ω
R6_____27KΩ
R7_____10KΩ
R8_____100Ω
R9_____100Ω
R10____100Ω
R11____12KΩ
R12____100Ω
R13____100Ω
R14____100Ω
R15____27KΩ
R16____2K2Ω
R17____560Ω
R18____100Ω
R19____10KΩ
R20____330Ω
R21____47Ω 2W
R22____56Ω
R23____2K2Ω
R24____22Ω
R25____56Ω
R26____180Ω
R27____500-1KΩ Trim
R28____560Ω
R29____56Ω
R30____56Ω
R31____22Ω 1W
R32____5Ω6 2W
R33____10Ω
R34____180Ω
R35____100Ω
R36____22Ω 2W
R37____180Ω
R38____56Ω
R39____47Ω 2W
R40____5Ω6 2W
R41____10Ω
R42____10Ω
R43____10Ω
R45____10Ω
R46____0.22Ω 5W
R47____0.22Ω 5W
R48____0.22Ω 5W
R49____0.22Ω 5W
R50____10Ω 5W

Capacitor

C1_____1цF
C2_____1.5nF
C3_____0.1цF 250-275V
C4_____0.1цF 250-275VC5_____100nF
C6_____100цF 50V
C7_____39pF
C8_____330pF
C9_____330pF
C10____330pF
C11____47nF 250-275V
C12____220nF 250-275V

Transistor

T1_____MJE340
T2_____2N5551 / C2240
T3_____2N5551 / C2240
T4_____2N5551 / C2240
T5_____2N5551 / C2240
T6_____2N5401 / BF423
T7_____2N5401 / BF423
T8_____2N5401 / BF423
T9_____2N5401 / BF423
T10____MJE350
T11____B1186
T12____TIP127
T13____D1763
T14____D1763
T15____B1186
T16____C5198
T17____A1941
T18____2SC2922 / MJ15024G
T19____2SC2922 / MJ15024G
T20____2SA1216 / MJ15025G
T21____2SA1216 / MJ15025G

This installation include gain JRC4558

This is pcb design

Installation with booster

PCB design by SIGMA-4 Madiun ©

Other high power amplifier circuit : 1500W HiFi Power Amplfier

Saturday, November 15, 2014

2×5 W STEREO POWER AMPLIFIER CIRCUIT BASED ON BA5417

BA5417 Stereo Power Amplifier

BA5417 is a stereo amplifier IC with a lot of good features like thermal shut down, standby function, soft clipping, wide operating voltage range etc. The IC can deliver 5W per channel into 4 ohm loud speakers at 12V DC supply voltage. The BA5417 has excellent sound quality and low THD (total harmonic distortion) around 0.1% at F=1kHz; Pout=0.5W.

Description

Setup and working of this stereo power amplifier circuit is somewhat similar to the BA5406 based stereo amplifier circuit published previously. C10 and C11 are DC decoupling capacitors which block any DC level present in the input signals. C2 and C6 couples the amplifiers left and right power outputs to the corresponding loud speakers. C1 and C5 are bootstrap capacitors. Bootstrapping is a method in which a portion of the amplifiers is taken and applied to the input. The prime objective of bootstrapping is to improve the input impedance. Networks R1,C3 and R2,C7 are meant for improving the high frequency stability of the circuit. C4 is the power supply filter capacitor. S1 is the standby switch. C8 is a filter capacitor. R3 and R4 sets the gain of the left and right channels of the amplifier in conjunction with the 39K internal feedback resistors.

Circuit Diagram

Notes

Supply voltage range of BA5417 is from 6 to 15V DC.
The recommended supply voltage for this circuit is 12V DC.
The power supply must be well regulated and filtered.
BA5417 requires a heatsink.
The circuit can be assembled on a perf board without much degradation in performance.

Saturday, November 8, 2014

LM1875 – POWER AMPLIFIER 20 WATT

The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.

The LM1875 delivers 20 watts into a 4Ω or 8Ω load on ±25V supplies. Using an 8 load and ±30V supplies, over 30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown.

The LM1875 design takes advantage of advanced circuit techniques and processing to achieve extremely low distortion levels even at high output power levels. Other outstanding features include high gain, fast slew rate and a wide power bandwidth, large output voltage swing, high current capability, and a very wide supply range. The amplifier is internally compensated and stable for gains of 10 or greater.

Features
• Up to 30 watts output power
• AVO typically 90 dB
• Low distortion: 0.015%, 1 kHz, 20 W
• Wide power bandwidth: 70 kHz
• Protection for AC and DC short circuits to ground
• Thermal protection with parole circuit
• High current capability: 4A
• Wide supply range 16V-60V
• Internal output protection diodes
• 94 dB ripple rejection
• Plastic power package TO-220

LM1875 - POWER AMPLIFIER 20 WATT

Friday, November 7, 2014

L200 Variable Power Supply

The circuit was designed for a power supply that can be adjusted or altered depending on the pre-set value by using a L200 volatge and current regulator.

Designing a power supply with a flexible 5-pin L200 voltage regulator makes it self-sufficient for the limits in voltage and current. It has an adjustable output current up to 2 Amp, adjustable output voltage down to 2.85 Volts, input overvoltage protection, short circuit protection, output transistor protection, thermal overload protection, low standby current drain and low bias current on regulation pin.The L200 can be used to substitute fixed voltage regulators and reduces the need to store a range of fixed voltage regulators.

The primary rating of the winding of the transformer depends on the input source but the secondary rating must generate 12 Volts running 2 Amp. Controlling the current is limited by the 47-ohm resistor while the voltage output is regulated by the 10K-ohm resistor. The circuit will produce zero voltage output if the current will go beyond the limit.

For safety purposes, all connections in the transformer should be properly insulated especially when dealing with the mains input. A plastic bobbin with 2 chambers should be used for the primary and secondary coils. No transformer is totally safe, but keeping in mind the safety ways in handling live circuits can prevent such harm.

Source:www.zen22142.zen.co.uk/Circuits/Power/l200var.html

Friday, October 17, 2014

2N3055 and LM723 Power Supply 13 8Volt 10Amp circuit

My Friend want circuit power supply for VR.
I Find Website many, See to this Web http://www.rason.org
Good Site circuit.
This is circuit Power Supply 13.8 Volt 10 Amp by LM723 .
Detail ::

This circuit uses the LM723 IC which gives us excellent voltage regulation. The circuit uses 3 pass transistors which must be heat sinked. Resistor R9 allows the fine tuning of the voltage to exactly 13.8 volts and the resistor network formed by resistors R4 through R7 controls the current limiting. The LM723 limits the current when the voltage drop across R5 approaches .7 volts. To reduce costs, most commercial units rely on the HFE of the pass transistors to determine the current limiting. The fault in that system is that the HFE of the pass transistors actually increases when the transistors heat up and risks a thermal runaway condition causing a possible failure of the pass transistors. Because this circuit samples the collector current of the pass transistors, thermal runaway is not a problem in this circuit making it a much more reliable power supply.

Monday, October 13, 2014

Power Monitor Circuit Diagram

Here is a simple non-contact AC power monitor for home appliances and laboratory equipment that should remain continuously switched-on. A fuse failure or power breakdown in the equipment going unnoticed may cause irreparable loss. The monitor sounds an alarm on detecting power failure to the equipment. The circuit is built around CMOS IC CD4011 utilising only a few components. NAND gates N1 and N2 of the IC are wired as an oscillator that drives a piezobuzzer directly. Resistors R2 and R3 and capacitor C2 are the oscillator components. The amplifier comprising transistors T1 and T2 disables the oscillator when mains power is available. In the standby mode, the base of T1 picks up 50Hz mains hum during the positive half cycles of AC and T1 conducts.

Non-Contact Power Monitor Circuit diagram:

Non-Contact Power Monitor circuit diagram

This provides base current to T2 and it also conducts, pulling the collector to ground potential. As the collectors of T1 and T2 are connected to pin 2 of NAND gate N1 of the oscillator, the oscillator gets disabled when the transistors conduct. Capacitor C1 prevents rise of the collector voltage of T2 again during the negative half cycles. When the power fails, the electrical field around the equipment’s wiring ceases and T1 and T2 turn off. Capacitor C1 starts charging via R1 and preset VR and when it gets sufficiently charged, the oscillator is enabled and the piezobuzzer produces a shrill tone. Resistor R1 protects T2 from short circuit if VR is adjusted to zero resistance.

The circuit can be easily assembled on a perforated/breadboard. Use a small plastic case to enclose the circuit and a telescopic antenna as aerial. A 9V battery can be used to power the circuit. Since the circuit draws only a few microamperes current in the standby mode, the battery will last several months. After assembling the circuit, take the aerial near the mains cable and adjust VR until the alarm stops to indicate the standby mode. The circuit can be placed on the equipment to be monitored close to the mains cable.

Sunday, October 12, 2014

Power Supply 5V 1 3 3A by LM2575

Power

POWER1 is a switched power supply specially designed for use with modern single board computers. The mechanical dimensions match exactly those of the SBC ZWERG11A. Due to the small mechanical dimensions and the modern design, POWER1 can be used in all applications requiring a regulated voltage of 5 Volts DC, up to 3 Amperes. Voltage regulation is done with a component from National Semiconductor, known as “simple switcher”. Regarding the amount of extra components one can really call the design “simple”, yet resulting in a reliable and low-cost power supply.

Read More Source:

http://www.mct.net/product/power1.html

Friday, October 10, 2014

FAN302HL bassed 5 volt switching power supply circuit project

FAN302HL

FAN302HL

A very simple 5 volt switching power supply electronic circuit project can be designed using FAN302HL highly integrated PWM controller integrated circuit, that provides several features to enhance the performance of general flyback converters.
The constant-current control, of the FAN302HL proprietary topology enables simplified circuit designs without secondary feedback circuitry for battery charger applications.
This 5 volt switching power supply electronic circuit project accepts a wide range input voltage from 90 to 265 VAC and will provide a 5 volt regulated output at a maximum output current of 1.2 ampere .
A proprietary Burst-Mode function with low operation current minimizes standby power consumption.

The FAN302HL controller also provides several like protections : VDD Over-Voltage Protection (Auto-Restart) ,VS Over-Voltage Protection (Latch Mode) , Fixed Over-Temperature Protection .
The most difficult part that is require in this project is the transformer.
W1 is four winds; for each wind of turns, refer to table bellow. Add one insulating tape between the first and second layers.
W2 is wound two layers and uses triple-insulated wire: end of positive fly line is 3.5cm, layer end of negative fly line is 2.5cm.
W3 is spares winding in one layer.
W4 is wound in the core of the outermost layer and sparse winding.

Thursday, October 9, 2014

latest circuit and explanation of Basic UPS Power Supply

Circuit : Andy Collinson
Email: anc@mitedu.freeserve.co.uk

Description
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 takes over, with no spikes on the regulated supply.

UPS

Notes:
This circuit can be adapted for other regulated and unregulated voltages by using different regulators and batteries. For a 15 Volt regulated supply use two 12 Volt batteries in series and a 7815 regulator. There is a lot of flexibility in this circuit.
TR1 has a primary matched to the local electrical supply which is 240 Volts in the UK. The secondary winding should be rated at least 12 Volts at 2 amp, but can be higher, for example 15 Volts. FS1 is a slow blow type and protects against short circuits on the output, or indeed a faulty cell in a rechargeable battery. LED 1 will light ONLY when the electricity supply is present, with a power failure the LED will go out and output voltage is maintained by the battery. The circuit below simulates a working circuit with mains power applied:

mains

Between terminals VP1 and VP3 the nominal unregulated supply is available and a 5 Volt regulated supply between VP1 and VP2. Resistor R1 and D1 are the charging path for battery B1. D1 and D3 prevent LED1 being illuminated under power fail conditions. The battery is designed to be trickle charged, charging current defined as :-

(VP5 - 0.6 ) / R1
where VP5 is the unregulated DC power supply voltage.

D2 must be included in the circuit, without D2 the battery would charge from the full supply voltage without current limit, which would cause damage and overheating of some rechargeable batteries. An electrical power outage is simulated below:

power

Note that in all cases the 5 Volt regulated supply is maintained constantly, whilst the unregulated supply will vary a few volts.

Standby Capacity
The ability to maintain the regulated supply with no electrical supply depends on the load taken from the UPS and also the Ampere hour capacity of the battery. If you were using a 7A/h 12 Volt battery and load from the 5 Volt regulator was 0.5 Amp (and no load from the unregulated supply) then the regulated supply would be maintained for around 14 hours. Greater A/h capacity batteries would provide a longer standby time, and vice versa.

Wednesday, October 8, 2014

LM1877 bassed Audio power amplifier circuit and explanation

Using the LM1877 monolithic dual power amplifier can be designed a very simple audio amplifier circuit for small audio applications like portable devices .

This audio amplifier circuit is designed to deliver 2W per channel continuous into 8Ω loads. The LM1877 is designed to operate with a low number of external components, and still provide flexibility for use in stereo phonographs, tape recorders and AM-FM stereo receivers, etc.
Each power amplifier is biased from a common internal regulator to provide high power supply rejection, and output Q point centering. The LM1877 is internally compensated for all gains greater than 10.

This audio amplifier circuit can be powered from a wide input voltage range from 6 volt up to 24 volts .
For this audio power amplifier circuit diagram you must use a 8 ohms speaker .

Sunday, October 5, 2014

2N3055 TIP41 CA3140 Lab Power Supply 0 30V 2A

This is the schematic of the 30V/2A power supply I use in my own lab.It may look very complex, but it really isn’t very difficult to understand: it uses only the knowledge we’ve learned in the previous lessons.
The top part looks like the power supply we built in Lesson 7: the transformer L1 transforms the outlet voltage to a safe 30V, which is rectified by bridge rectifier G2 and smoothed by capacitor C5. Transistors T3 and T6 form a darlington transistor. This darlington replaces transistor T1 in Lesson 7. However, the base voltage is not controlled by a simple potmeter, but by an ‘electronic potmeter’ with voltage feedback. The advantage of this feedback is a load-independent output voltage.

Tuesday, September 16, 2014

Fuse Box Ford 2010 Fusion Power Distribution Diagram

Fuse Box Ford 2010 Fusion Power Distribution Diagram - Here are new post for Fuse Box Ford 2010 Fusion Power Distribution Diagram.

Fuse Box Ford 2010 Fusion Power Distribution Diagram

Fuse

Fuse

Fuse Panel Layout Diagram Parts: power assist steering, powertrain control module, starter motor relay, anti lock brake system, wiper washer, ABS valve, transmission module, alternator, console power point, A/C clutch, cooling fan motor, fuel relay, passenger power point, driver power seat, fuel pump, one touch start, heated side mirrors, back up lamp, A/C clutch, Injector, generator powertrain component, ignition coil, blower motor relay, fuel relay, starter relay,PCM relay.

Regulator power supply with op amp

Power supply circuit has a first amplifier using op-amp is IC uA741. Op amp circuit that is used only one, but it also features an adjustable voltage, which is steered by a trimpot resistors. Rtrim will set the input to the IC input on pin 2, so that if the detainee on Rtrim which will be channeled into ic enlarges the output voltage will be small, and otherwise. After the voltage is boosted and filtered and then the voltage will be regulated and boosted again by a NPN transistor.

op-amp

Output voltage 0.5V - 35V

Part List :
Resistor
R1____1K5
R2____1K trim
R3____10K
R4____330R
R5____1K
R6____47R
R7____68R
R8____820R
R9____47K
R10___22K
R11___1K5

Capacitor
C1____10000uF 80V

Transistor
Q1____2N3565
Q2____2N3565
Q3____S9013
Q4____S9013

Diode
D1____1N4007
D2____1N4007
LED1_Red Led

IC
U1____uA741 (op-amp ic)

Monday, September 15, 2014

Stereo Power Amplifier Using IC 7905

79xx is a widely known series of low-cost, fixed-negative-voltage regulators. These integrated diagram are available with output current of 100-150 mA (L series), 0.4-0.5A (M series), up to 1A (standard series), etc. They can be used in many applications other than regulators, audio power amplifier being one of them. As shown in the schema diagram, a simple stereo audio amplifier is built around two 7905 negative-voltage regulators (IC1 and IC2) and a few discrete components. The 7905 IC (a -5V regulator) used here is readily available. However, the schema will also work with other 79XX regulators if appropriate power supply is used. Both channels shown in the diagram are identical. Hence the description below is only for the first channel. The quality of the output signal is within acceptable limits.

Circuit diagram :
Stereo-Power-Amplifier

Stereo-Power-Amplifier

Stereo Power Amplifier Circuit Diagram

Regulator IC 7905 works as an amplifier for the voltages applied to common pin2 (Ground or GND). The minimal voltage drop over the standard 7905 is around 2V and it depends on the output current. Feedback resistors in the IC set the gain of the channel internally. The amplifier is a class-A audio amplifier. The regulator IC produces the negative output signal.

Resistor R3 provides the positive signal. It limits the maximum output current of the regulator during the negative half period of the amplified sinusoidal signal. The minimal applicable value of R3 for the regulator 7905 is 8.2 to 10 ohms per 5W. Optimisation of the value of R3 depends on the output voltage of the regulator, negative power supply (–5V) and load resistance of loudspeaker (LS1). If the required output current for LS1 is below 100 mA, the value of resistor R3 can be 33 to 51 ohms per watt.

Normally, the load resistance of the loudspeaker should be higher than of R3 in order to obtain a large peak-to-peak amplitude. But this can be neglected in order to obtain lower power dissipation on R3 and the IC. The schema works with any load resistance (R3 in parallel with LS1 as the load) under the condition that the regulator is not overloaded with current and power dissipation. However, it is preferable to use a loudspeaker with a high resistance (8 ohms, 16 ohms or more). The amplifier works well with low-impedance headphones having a resistance of 24 to 32 ohms. The voltage difference between the ground pin of 7905 and the output pin is fixed internally.

The input resistance of the amplifier is relatively low and depends on potentiometer VR1 and input resistance of the ground pin. Practically, any stereo output capable of driving 24- or 32-ohm headphones and loudspeakers can drive the input of the stereo amplifier with 7905. If VR1 is removed, the amplifier will still work but there will be more distortion. Therefore potentiometer VR1 is used to provide sufficient variable audio signal. The values of output capacitors C10 and C11 are usually between 0.1 µF and 1 µF. A small resistance can be connected in series with them if needed. S2 is the on/off switch. Switch S1 is for mono/stereo selection. When switch S1 is closed, the amplifier works as a two-way mono amplifier. If S1 is open, the amplifier works as a stereo amplifier.

The schema is powered by a 12V battery. The positive terminal of the battery is the common node. The negative terminal is connected to pin 2 of IC1, which is the –12V supply line. The maximum operating voltage can be up to –35V. If no input signal is applied, the DC voltage on the output of the regulator 7905 should be around –5V, which depends to some extent on the value of VR1. The maximum output current of 7905 can be up to 1A and the maximum power dissipation is up to 15W. IC 7905 has internal thermal protection.

Assemble the schema on a general-purpose PCB and enclose in a suitable cabinet. Fix the stereo female jack on the front panel and speaker to the rear side of the cabinet, and the 12V battery inside the cabinet. Fix LED1 and switches S1 and S2 too on the front panel of the cabinet. Mount the regulator IC 7905 on a heat-sink with thermal resistance below 15°C/W. The metallic part on the case is internally connected with the input pin of the regulator.

Author : Petre tzv. Petrov Sourced by: EFy

Monday, September 8, 2014

Simple Microprocessor power supply watchdog circuit Wiring diagram

The Simple Microprocessor power supply watchdog schema Diagram monitors the input to the microprocessor 5 V regulated supply for voltage drops and initiates a reset sequence before supply regulation is lost. In operation, the resistor capacitor combination Rs and Cj form a short time constant smoothing network for the output of the fullwave bridge rectifier.

An approximately triangular, voltage waveform appears across C and Rs and it is the minimum excursion of this that initiates the reset. Diode Dg prevents charge sharing between capacitors Cj and Ck. Resistors Rn and Rm form a feedback network around the voltage reference section of the LM10C, setting a threshold voltage of 3.4 volts.

Microprocessor power supply watchdog schema Diagram

Simple

The threshold voltage is set at 90% of the minimum voltage of the triangular waveform. When the triangular wave trough, at the comparators non-inverting input, dips below the threshold, the comparator output is driven low. This presents a reset to the microprocessor. Capacitor Ch is charged slowly through resistor Rk and discharged rapidly through diode De.

Constant LED Power Supply Wiring diagram Schematic

An LED is usually a series resistor needed to ensure that the LED does not get too much power. The disadvantage of such a resistor is that the current thus also changes by the LED and the brightness as the voltage changes.

This schema prevents that, by independent of the voltage, a constant current through the LED.The schema uses two transistors and two resistors. The schema can be connected to voltages of from 5 to 24 V.

Constant LED Power Supply Circuit Diagram

Build

Saturday, September 6, 2014

Transformerless 5 Volt DC Power Supply

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. However, what if the appliance’s total power consumption is very small? Transformer-based power supplies are bulky, while the switchers are generally made to provide greater current output, with a significant increase in complexity, problems involving PCB layout and, inherently, reduced reliability.

Is it possible to create a simple, minimum part-count mains (230 VAC primary) power supply, without transformers or coils, capable of delivering about 100mA at, say, 5 V? A general approach could be to employ a highly inefficient stabilizer that would rectify AC and, utilizing a zener diode to provide a 5.1 V output, dissipate all the excess from 5.1 V to (230×√2) volts in a resistor. Even if the load would require only about 10mA, the loss would be approximately 3 watts, so a significant heat dissipation would occur even for such a small power consumption.

Transformerless 5 Volt DC Power Supply

Transformerless

At 100mA, the useless dissipation would go over 30 W, making this scheme completely unacceptable. Power conversion efficiency is not a major consideration here; instead, the basic problem is how to reduce heavy dissipation and protect the components from burning out. The schema shown here is one of the simplest ways to achieve the above goals in practice. A JVR varistor is used for over-voltage/surge protection. Voltage divider R1-R2 follows the rectified 230 V and, when it is high enough, T1 turns on and T3 cannot conduct.

When the rectified voltage drops, T1 turns off and T3 starts to conduct current into the reservoir capacitor C1. The interception point (the moment when T1 turns off) is set by P1 (usually set to about 3k3), which controls the total output current capacity of the power supply: reducing P1 makes T1 react later, stopping T3 later, so more current is supplied, but with increased heat dissipation. Components T2, R3 and C2 form a typical ‘soft start’ schema to reduce current spikes — this is necessary in order to limit C1’s charging current when the power supply is initially turned on. At a given setting of P1, the output current through R5 is constant.

Thus, load R4 takes as much current as it requires, while the rest goes through a zener diode, D5. Knowing the maximum current drawn by the load allows adjusting P1 to such a value as to provide a total current through R5 just 5 to 6mA over the maximum required by the load. In this way, unnecessary dissipation is much reduced, with zener stabilization function preserved. Zener diode D5 also protects C1 from over voltages, thus enabling te use of low-cost 16 V electrolytics. The current flow through R5 and D5, even when the load is disconnected, prevents T3’s gate-source voltage from rising too much and causing damage to device. In addition, T1 need not be a high-voltage transistor, but its current gain should exceed 120 (e.g. BC546B, or even BC547C can be used).

Friday, September 5, 2014

Low Ripple Regulated Power Supply Wiring diagram Schematic

This schema may be used where a high current is required with a low ripple voltage (such as in a high powered class AB amplifier when high quality reproduction is necessary ).

Low Ripple Regulated Power Supply Circuit Diagram

Low

PARTS LIST
R1	2.2KΩ 1W
R2	56Ω 1W
R3	1oKΩ 1W
C1	1000µF 63V
C2	100µF 50V
C3	470µF 50V
D1, D2, D3, D4	6A Bridge Rectifier
D5	500mA Zener Diode (see description)
Q1	2N3055
Q2	2N3054

Q1, Q2, and R2 may be regarded as a power darlington transistor. D5 and R1 provide a reference voltage at the base of Q1. D5 should be chosen thus:
D5=V_out-1.2

C2 can be chosen for the degree of smoothness as its value is effectively multiplied by the combined gains of Q1/Q2, if 100µF is chosen for C2, assuming minimum hef for Q1 and Q2,

C=100×15(Q1)×25(Q2)

=37000µF.

Thursday, September 4, 2014

400W High Power Mosfet Amplifier

High Power Amplifier Mosfet 400W . These amplifiers circuit can be used for virtually any application that requires high performance, low use Noise, distortion and excellent sound quality. Examples would be subwoofer amplifier should FOH stage Amplifiers, surround a canal a very powerful sound amplifier, etc. The 400W MOSFET-amplifier has four key stages of amplification. We are looking to start any Phase appropriate detail.

Schematics Diagram 400W MOSFET Amplifier

400watt

As the name suggests All Q ,C and ZD the Bias and buffer phases. Its main goal is to provide a stable MOSFET Gates and offset voltage and the voltage buffer amplifier stage of the High Resource capacity. What would have without the phase response and the effect Slew rate is indeed very bad. The flip side of the coin is not the extra step Introduction of an additional dominant pole in the amplifier feedback loop.

Also to what the name suggests this stage converts the voltage developed in the VAS and provides all the amps required to drive at 8 or 4 ohms. 2-ohm loads are possible for several minutes at a time. In fact, I have tested more than 1600 1kW amplifier Watts RMS at 2 ohms. But that would not be recommended as a long-term exposure at all. If it is higher than the figures of the STI-amp. Power to the AV amplifier 800 The components of the power for this amplifier are as follows, and are favored A channel or a power module alone. 1 toroidal transformer with a rating of 1kVA. Primary windings are made to fit.

source:[link]

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