Simple Audio Booster circuitHere the simple, low bulk and accessible audio booster circuit. It uses a transistor of 2N3392 ad the capital amplifier. This ambit has a maximurn accretion of about 22 dB (voltage gain). The abundance acknowledgment of the amplifier is absitively primarily by the bulk of aloof a few components, primarily C1 and R1. The ethics aural the schematic architecture present
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Relay Circuit 9 Second LED Timer
Relay Circuit 9 Second LED TimerThis circuit provides a visual 9 second delay using 10 LEDs before closing a 12 volt relay. When the displace about-face is closed, the 4017 decade adverse will be displace to the 0 calculation which illuminates the LED apprenticed from pin 3. The 555 timer achievement at pin 3 will be aerial and the voltage at pins 6 and 2 of the timer will be a little beneath
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TDA1054 Hi Fi stereo preamplifier
This stereo preamplifier circuit Hi-Fi is congenital with IC SGS TDA1054. TDA1054 is a fusion of DIL of 16 pins and 2 abstract preamplifier circuits integrates. Is a low babble preamplifier with little or no hassle in the creation process.The split of Aboriginal framework (IC1a) has an attribute of 3 mV acuity and composed a change of abundance of C5, C3, R6 and R8. Attach the bottom holding
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Passive Crossover schematic
Crossover is a tool to limit the "frequency range" to be accepted by the speaker. Imagine that the court act as traffic police, which regulates the flow to the tweeter, midrange and bass for the subwoofer. Imagine if you had not crossed, the frequency will be chaos, there is a loss of low frequency on high street frekwesni tweeter on the subwoofer, so it is not effective and also if there are
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Simple Circuit Car Battery Charger
Simple Circuit Car Battery Charger This actual simple ambit uses a agent ,two diodes , a capacitor and an ammeter.To allegation a array aloof affix the + and - terminals of the ambit to the agnate terminals of the battery.When the array is not charged, the ammeter account shows 1-3 amps.When the array is absolutely answerable the ammeter reads Aught or about zero, afterwards which the array
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SCR-DC delay circuit
The apparent reality of circuit diagram is delay circuit DC power which is based on a SCR. this circuit is a real accessible and can be active in applications. The live of this circuit is real simple. If the ability to assign is activated the capacitor C2 through resistor R2 accuses and the voltage and the capacitor just exceeds the breakdown voltage of the Zener diode D3, break it down and the
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Portable Phone Preamplifier Circuit Diagram
Portable Phone Preamplifier Circuit DiagramThis assemblage was advised for amateurs owning an old accumulating of vinyl recordings and absent to accept it digitally remastered into a claimed computer.Or sometimes they would accept to an old, invaluable, LP accumulating through their avant-garde Aerial Fidelity chain, usually defective a phono preamp stage: this is a ambit able of acceptable
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Bike Light Flasher using 555 IC
Bike Light Flasher using 555 ICI ride my personal mountain bike asign during the night and also at times I'm undecided if men and women can easily see myself. This specific circuit may display an incandescent lighting that you could purchase through Radio Shack. Change the VR's on your display conditions and also guantee that that light you employ was created to released higher brightness. The
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30W VHF FM Broadcast Amplifier
The 30 watt amplifier circuit shown below provides an appropriate power boost with an input of 4 watt up to 6 watts. The circuit is designed to cover 88-108MHz FM Broadcast Band. However, the circuit is very stable at my place and provides a clean-output through seven (7) element Butter-worth low-pass filter.The heart of the circuit is 2SC1946A VHF RF power transistor. The transistor is
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Voltage doubling circuit NE555
The circuit diagram of a simple voltage absolute NE555 timer application of doubler is evident here. NE555 IC is currently active as a astable mutivibrator operating at about 9 kHz. The abject of two transistors (Q1 and Q2) is short and completion of the astable multivibrator (PIN 3) is affiliated to it.When an astable multivibrator is low, Q1 is OFF and Q2 will be activated. Abrogating that C3
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LA3161 Stereo Preamplifier Circuit
LA3161 is an integrated 2 channel pre-amplifier meant for car stereo applications. The LA3161 contains a built in voltage regulator that plays an excellent role in improving ripple rejection . The IC needs minimum number of external components and the noise level is extremely low. The IC has high input impedance (around 100K) and is available in an 8 pin SIL package.In the circuit each of the
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Thermostat LM56 Project Circuit Diagram
Thermostat LM56 Project Circuit DiagramLM56 Thermostat Project Circuit Diagram values of R1, R2 and R3 for the required trip points VT1 and VT2 can be determined using the subsequent equations.VT1 = 1.250V x (R1)/ (R1 + R2 + R3)VT2 = 1.250V x (R1 + R2)/ (R1 + R2 + R3)where:(R1 + R2 + R3) = 27 k Ohms andVT1 or T2 = [6.20 mV/degree Celsius x T] = 395 mV therefore:R1 = VT1/ (1.25V) x 27 k OhmsR2 =
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Telephone DTMF Remote Control
The circuit is a remotely operated DTMF telephone. The circuit can be used to change up to 9 devices using the keys 0 to 9 phone. Digit 0 is used to switch between the phone system remotely and change the way of normal conversation. IC KT3170 (DTMF to BCD decoder) is used to decode DTMF signals transmitted through the telephone line to the corresponding BCD format. IC 74 154 (4 to 16
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Ultra low Drop Linear Voltage Regulator
Ultra low Drop Linear Voltage Regulator CircuitThe ambit is a MOSFET based beeline voltage regulator with a voltage bead of as low as 60 mV at 1 ampere. Bead of a beneath millivolts is accessible with bigger MOSFETs accepting lower RDS(on) resistance. The ambit in Fig. 1 uses 15V-0-15V accessory from a step-down agent and employs an n-channel MOSFET IRF 540 to get the adapted 12V achievement
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12VDC to 220V AC 500W Inverter Circuit
Circuit Inverter 500 Watt 12VDC to 220VAC is made using a transistor. The basiccally of the circuit Inverter 12VDC to 220VAC 500 Watt This is a configuration of 2 pieces of transistors Q1 and Q2 which form a series of Flip-Flop. The output of the flip-flop Q1 and Q2 in the circuit Inverter 12VDC to 220VAC 500 Watt is then broken down for each pulse to complement each other using a series
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0,5 Watt power amplifier circuit with TDA1015T
This circuit is also Very simple and easy to make , simply by using the IC and 6 other components such as resistor and capacitor, you have to run this circuit. The IC uses TDA1015T , minimum voltage require 3 volt and maximum voltage required 12 volt. Power output 0,5 Watt mono , its low power amplifier.Power amplifier Schematic below :Click image to view largerIf the amplifier does not work ,
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Audio power amplifier with LM4651 & LM4652 170w
The combination of the driver IC LM4651 and LM4652 IC power amplifier power amplifier MOSFET class D solution provides a high efficiency, suitable for car quality of speakers, amplifiers and powered subwoofers.
4651 the LM is a driver of the modulator (PWM) of fully integrated conventional pulse width, containing low-voltage circuits, short, resilience and thermal shutdown circuit protection.
Audio Amplifier Using IC LM4780
Audio Amplifier Using IC LM4780
Explore power amplifier integrated circuit from National Semiconductor LM4780. What's so special? Well, first of all - a very low harmonic distortion. In general, manufacturers indicate the maximum power of his ingenious craft regularly with the harmonic content of 10%. At the same chip, CT in the specified maximum power is only 0.5%! Therefore, it is the most
AM Transmitter Double Side Band
AM Transmitter Double Side Band
The ambit of AM transmitter is advised to address (amplitude modulated) DSB (double ancillary band) signals. A articulate AM arresting consists of a carrier and two symetrically spaced ancillary bands. The two ancillary bands accept the aforementioned amplitude and backpack the aforementioned information. In fact, the carrier itself coveys or carries no
741 square wave generator
A square wave generator with IC UA741 range shown here.The circuit uses positive feedback to the Schmitt trigger action and negative feedback to measure the time of the waveform.
Let's assume that the output is high and the C1 capacitor is fully discharged.C1 now get to charge through R1 and R2 C1.When the voltage rises above the junction of R3 and R4, the output changes quickly entirely
Infrared Radar (IR) System
Infrared Radar (IR) SystemChris from PyroElectro.com has a abundant commodity about a do-it-yourself alarm arrangement body with PIC18F452. It’s a abundant amusement activity although the schematic is actual complicated. This activity uses three capital accessories to actualize the claimed alarm system. The IR Ambit sensor gives output, the pic microcontroller processes it and again displays the
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VHF Band TV Transmitter
VHF Band TV Transmitter Circuit DiagramA VHF band TV transmitter application abrogating complete accentuation and PAL video modulation. This is acceptable for countries application TV systems B and G.Notes:The abundance of the transmitter lies aural VHF and VLF ambit on the TV channel, about this ambit has not been activated at UHF frequencies. The articulate complete arresting contains 5.5 -6MHz
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3A Switching Voltage Regulator
3A Switching Voltage RegulatorAbove circuit diagram is a easy, simple and bargain switching voltage regulator which has adequacy to bear adjustable voltage achievement ambit of 1.8V to 32V and changeless electric accepted of 3A. This regulator use adjustable regulator IC of LM317HV and a ability PNP transistor of 2N3792.The LM317HV is adjustable 3-terminal positive voltage regulators capable of
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(NiCd) Simple Smart Nicad Battery Charger
In appliance that appeal for aerial current, Nicad (NiCd) rechargeable array still has the angry achievement compared to NiMH and Lithium battery. The charger ambit actuality is acute in the way it handle the amiss polarity of the array placement.The core of this battery charger circuit is the Q2, configured a constant current source for the battery. LED D3 and zener diode D2 make the voltage
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12V to 8V DC Converter using 7808 regulator IC
12V to 8V DC converter using 7808 regulator ICThis project uses simple converter to convert 12V IC 7808 DC 8V DC battery. This converter can also be done even a single component, the controller 7808. Converter can produce a maximum current of 1.5 A (heat sink) to an entry 8V 11V to 25V. C = 220uF electrolytic capacitor rated at 25V, and can replace the output capacitor with a higher value (higher
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LM12 150W audio amp
LM12 operational amplifier can output currents of up to 10A. The LM12 in encapsulated in TO 3 with 4-pin, can support up to 800W and has enough internal protections to avoid excess pants or overheating.You can use LM12CL with 30 V maximum voltage or LM12C with the maximum of 40V. The coil L1 has 40 laps 1 mm of copper, rolled up on the R4. If you use LM12CL is recommended to have 2 x 22V toroidal
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30 watt Audio Amplifier using TDA 2040
An 30 Watt audio amplifier circuit with TDA2040 shown here. TDA2040 is class AB amplifier monolithic integrated audio Pentawatt available in the package. The IC has a low harmonic distortion, cross low over the distortion and has a built in short circuit protection circuit. In the circuit of two TDA2040 ICs are connected in BTL (bridge tied load) configuration to provide an output of 30W into a
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12 Volt LED Lead Acid Battery Meter
12 Volt LED Lead Acid Battery MeterIn the circuit, a cloister voltage comparator (LM339) is acclimated as a simple bar blueprint beat to announce the allegation action of a 12 volt, advance acerbic battery. A 5 volt advertence voltage is affiliated to anniversary of the (+) inputs of the four comparators and the (-) inputs are affiliated to alternating credibility forth a voltage divider. The
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1000W Audio Power Amplifier Blazer Circuit
This is a audio power amplifier Blazer circuit provides up to 1000Watt . This routes bass and treble alive. Importantly Power , has been fairly high voltage 70Vdc GND -70V 10A current low level.The transistors are 2SC3858 (NPN) and 2SA1494 (PNP), high bandwidth, safe operating , high linearity and high gain. Driver transistors are 2SC5200 (NPN) and 2SA1943 (PNP). All devices are rated at 230V,
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10V Switching Regulator based on LM5007
The circuit diagram shown here is a 10V Switching regulator based on the National Semiconductor LM5007. The LM5007 is a step composed of the switching regulator that has all the systems necessary for making a circuit switching regulator's cost effective and reliable. The IC is available in MSOP-8, LLP-8 packages and has lots of features like thermal locked output voltage, duty cycle limitation,
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100W Guitar Amplifier Circuit
100W Guitar Amplifier CircuitThe ability amp lath has remained banausic back it was aboriginal appear in 2002. It absolutely isn’t broken, so there’s no acumen to fix it. The photo beneath shows a absolutely accumulated lath (available as apparent as M27). Application TIP35/36C transistors, the achievement date is advisedly massive overkill. This ensures believability beneath the best
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10 Watt Linier Amplifier
10 Watt Linier Amplifier Circuit DiagramIt is absolutely accessible to get a watt or added with actual simple equipment, but to get added than 5 watts becomes a little added difficult. This commodity describes a 10 watt beeline amplifier that is able of carrying over 15 watts into 50 ohms and uses bargain artificial transistors that are acclimated in CB equipment. If you accept adversity in
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BH1417 Transmissor de FM estéreo
The circuit shown here is a FM stereo transmitter that can transmit high quality signals for a variety of 70 feet. The circuit is depending on the stereo PLL transmitter IC in a BH1417 Rhom semiconductors. The IC has separate audio processing sections to the left and right channels, pre emphasis circuit to improve the signal to noise ratio, Crystal control circuit for exact frequency locking,
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Car battery charger with MC78T12
Car battery charger with MC78T12 circuitIt is a very simple circuit that can be used to charge car batteries. In this circuit there are facilities to control the charging current and voltage.The circuit is based on The MC78T12ABT IC. IC is just a 7812 in TO-3 package capable of 3A. The transformer T1 steps down the mains voltage and the diodes D1 and D2 does the work of rectification. The
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Class D amplifier IC BD5460
BD5460 is a low-power class D amplifier that can be acclimatized in low-capacity applications such as portable audio devices. BD5460 don't crave a LC to clarify the Apostle and may be apprentices of a battery, the standby of BA5460 accepted is about something and there is no ON/OFF clicks turn. The BD5460 can withstand 0.8 watts into 8 ohm an apostle in 3.6 V operating voltage. The scope of
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Ultrasonic Remote Control Circuit
This is a remote control circuit using ultrasonic signals. The Ultrasonic Remote Control Circuit is built around IC1 (NE 555). IC1 astable operating system is a multi-vibrator in the output of the amplifier IC1 is 40KHz.The complementary pair of transistors (Q1 and Q2) and transmitted by the ultrasonic transmitter K1. Switch S1 is used to activate the transmitter.Note:switch S1 can be a push
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UPC1651 in FM transmitter
This FM transmitter is build with UPC1651 is a Silicon monolithic integrated circuit designed specifically as a broadband amplifier covering the HF through the UHF band. UPC1651 has high power gain: 19 dB at 500 MHz, low-voltage operation of 5 V in a small package. The coil has 5 turns of 0.5 mm copper wire with a diameter of 4 mm of coil. You can use it as a low-power FM transmitter or a power
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Electret Microphone Preamplifier 1 Transistor
This is a simple Electret Microphone Preamplifier 1 Transistor circuit which can be used between the microphone and stereo amplifier. The microphone amplifier circuit suitable for use with the normal line of amplifier stereo / CD / AUX / Tape inputs. This preamp can take both dynamic and electret microphone inputs. The circuit performance is not superior, but can be used with many projects, not
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Digital Code Lock Programmable Circuit
AppId is over the quotaAppId is over the quota type='html'>Digital Code Lock Programmable CircuitA programmable cipher lock can be acclimated for abundant applications in which admission to an article/gadget is to be belted to a bound cardinal of persons. Actuality is yet addition ambit of a cipher lock employing mainly the CMOS ICs and thumbwheel switches (TWS) besides a few added components. It
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Digital Compass Schematic Diagram
Digital Compass Schematic DiagramDigital Compass Specifications:· Power: 5-18 volts DC @ 30 ma· Inputs: Earth’s magnetic field· Outputs: Open collector NPN, sink 25 ma per direction, digital output 1 or 0· Size: 12.7 mm diameter, 16 mm tall· Temp: -20 to +85 degrees C· Provides 8 headings (N, NE, E, SE, S, SW, W, and NW).· 12 degree tilt with acceptable results
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Driver Led Dot Matrix 8 X 8 circuit
Driver Led Dot Matrix 8 X 8 circuitin a continuing series can find a way to drive a LED array with 64 LEDs (8 rows by 8 columns - 8x8 screen) or less, for example, 35 LEDs (7 rows and 5 columns - 5x7 points). Driving a 64 LED matrix display is simple and requires only the parent unit led by example, more than 128 or multiplier can develop by itself.Use persistence of vision to drive the LED
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Wireless headphones transmitter circuit
Wireless headphones transmitter circuitThis wireless headphones transmitter assures a affection accession over 2 meters. The oscillator abundance is amid 1750KHz and 3500KHz and for antenna we use a ferrite bar. IC1 amplifies the audio arresting and TC1 is a buffer. D1 signals that the transmitter is on and is a voltage balance for the oscillator . L1 is a toroidal amount T50-2 with 80 turns,
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Wireless FM Transmitter
Wireless FM Transmitter Circuit DiagramThe wireless transmitter ambit congenital about transistor T1 (BF494) is a basal low-power variable-frequency VHF oscillator. A varicap diode ambit is included to change the abundance of the fm transmitter and to accommodate abundance accentuation by audio signals. The achievement of the oscillator is about 50 milliwatts. Transistor T2 (2N3866) forms a
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12 watt FM Transmitter circuit
AppId is over the quotaAppId is over the quota type='html'>12 watt FM Transmitter circuitThe advantages of FM modulation is free from the influence of the disturbance of air, bandwidth (broadband) is larger, and the high fidelitas. Compared to the AM system.FM transmitter is a modification of the FM transmitter on the market (s Saturn type 038). several series of modifications and additions can
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Wireless Microphone circuit diagram
Wireless Microphone circuit diagram
The ambit of frequencies for the FM advertisement bandage is 90MHz (MHz = Megahertz or 90 actor cycles per second). Because the FM microphone has a capricious acquainted circuit, it can be acquainted to a quiet atom on your bounded FM advertisement bandage for the best reception. When the baby microphone aspect is addled by sound, it converts the audio to a
Wireless Headphones Receiver
Wireless Headphones ReceiverThe wireless headphones receiver presented is an accepted appliance of ZN415 produced by Ferranti ( abbreviate beachcomber receiver). ZN415 assures a affection reproduction, has a 1.5 array alimentation and contains a MA detector and audio amplifier. The accepted burning is < 5mA, L1 has 40 turns, 0.2 Ø chestnut and 20mm Ø ferrite. C1 is adjuted with an non metal screw
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Voltage converter circuit using TDA 2003
6 to 12 volts Converter Circuit using TDA 2003Two IC TDA2003 are used here, which are connected to oscillators and their results are identical, but 180 out of phase. Capacitors C3 and C6 determine the frequency of these oscillators respectively. When IC1's output charges capacitor C1 to the voltage across diode D2. When the output of IC1 is high, this voltage is also added to the C1. Now the
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TL062 Subwoofer Low Pass Filter
Many circuits of low-pass filter for subwoofer seem to be given, and also is just another. The circuit given here is depending on the TL062 of an opamp ST Micro Electronics. TL062 is really a high input impedance dual J-FET opamp, and this has very low power consumption and high slew rate. The opamp has good audio features and is quite suitable for this circuit.Outside these two opamps inside
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TDA2822 Stereo Amplifier circuit
TDA2822 is a stereo low-power op amplifier used in the Walkman and headphones. It can output 250 milliwatts. TDA2822 is an operational amplifier ideal for low production. It is a good option as a stereo preamplifier circuits high-powered amplifier. It has two inputs and two outputs that can generate 250 milliwatts of output.power. The circuit of the amplifier IC is well established for noise-free
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Police Siren circuit NE555
A lot of electronic circuits using NE555 timer IC here is the circuit diagram of a police siren NE55 timer IC-based. The circuit uses two timers NE555 ICs and each of them are arrested as astable multivibrators. The circuit will be fed somewhere between 6 to 15V DC and is quite high. Connecting an extra power amplifier in the output you can further enhance the sound.IC1 is connected as an astable
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LTC3440 5V Boost Converter Circuit
A simple 5V boost converter using LTC3440 is shown here. LTC3440 is a highly efficient DC to DC converter which can be operated from input voltages below, higher than or equal to the output voltage. In terms of synchronous rectification, LTC3440 provides up to 96 efficiency and up to 600mA of output current is guaranteed. The IC contains a built in synchronizable oscillator whose frequency whose
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100W MOSFET Power Amplifier based on IRFP240
A 100W MOSFET power amplifier circuit based on IRFP240 and IRFP9240 MOSFETs is shown here. The amplifier operates from a +45/-45 V DC twin supply and might deliver 100 watt rms into an 8t ohm speaker and 160 watt rms into a 4 ohm speaker. This Hi-Fi amplifier circuit is appropriate for lots applications like general purpose amplifier, guitar amplifier, keyboard amplifier. The amplifier and also
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AC to DC 90W Switching Adaptor Power
AC to DC 90W Switching Adaptor PowerAC to DC adapter circuit switching contactors maximum output power of 90W. Switching power supply is constructed using a high voltage power switching regulator IC MC33374 and additional components. The MC33374 is a monolithic IC for high-voltage power switching regulators that are specially designed to operate directly from a rectified AC line source, and the
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