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This is the 8 Watt Audio Power Amplifier Circuit Diagram. This amp can be used as a simple booster, the heart of a more complicated amplifier or used as a guitar amp. It is very small and portable unit and can be powered through 12V battery. I built the circuit on a Vero Board and had to add extra inductors, capacitors and resistors to prevent oscillation. Circuit diagram: 8 Watt Audio Power Amplifier Circuit Diagram Parts: R1 = 47K R2 = 2.2R/1W R3 = 220R/1W R4 = 2.2R/1W C1 = 100nF-63V C2 = 10uF-25V C3 = 470uF-25V C4 = 2000uF-25V C5 = 100nF-63V IC1 = LM383 SPKR = 4ohm/8W Notes: IC1 must be installed on a heat sink. C1 is for filtering and to prevent oscillation and should not be omitted. The circuit can be built on a Vero Board, universal solder board or PC board, the PC board is preferred. The circuit draws about 880Ma at 12 V. By swapping the values of R2 and R3; you can turn this amplifier into a guitar amp with no preamp required. If you can't find 2000uF, then replace C4 with ...

Features: Pin compatible IC series that covers power ratings from 50 W × 2 channels to 180 W × 2 channels at 0.7 or 0.8% THD, 20 Hz to 20 kHz. This allows the use of a common PCB for all output classes.  The pin arrangement is also unified with that of the three-channel STK413-000 series. This means that PCBs designed for three-channel models can also be used for two-channel models.  Miniature package — 50 W/ch to 120 W/ch (THD = 0.8%, f = 20 Hz to 20 kHz): 64 × 36.5× 8.5 mm* — 150 W/ch to 180 W/ch (THD = 0.7%, f = 20 Hz to 20 kHz): 78 × 44× 9 mm* * Not including the IC pins.  Allowable load shorted time: 0.3 s Circuit Diagram: 60W+60W  Audio Power Amplifier

Overview: The  AN7163  is an integrated circuit designed for power amplifier of 17W output with low noise and low distortion, and it suits TV set with multi-sound. Stereo operation is enabled due to incorporating two amplifiers on one chip. 12-pin SIL package enabled compact and high-densely mounted set.  Circuit diagram: BTL 17 watt audio power amplifier Datasheet for AN7163:

The series of amplifiers that are used on the television audio, amplifier used amplifier ICs, including the IC: • AN7523 • AN7522 • TDA2616 Third series of the function with the same system, namely BTL (Bridge Transformer Less). By using such configuration we get several advantages, namely no use coupling capacitors or coupling transformers. Block diagram of circuit in the IC AN7522, AN7523 and TDA2616 as in the image below : Schematic AN7522 AN7523 amplifier schematic Schematic TDA2616

In the early 1960s RCA brought out a transistor that was to become truly legendary: the 2N3055. With a pair of these devices, you could put together an audio power amplifier that could deliver a healthy 40 W into 8 Ω. The circuit described here is fully in tune with the spirit of that era. For example, there are only seven active components in each channel, which reflects the design simplicity typical of that era (and actually a timeless quality). This ‘retro’ power amplifier pumps 45 W into 8 Ω with an input signal level of 0.5 Vrms. It works as follows: the input signal is applied to the base of T1, while negative feedback from the output, attenuated by voltage divider R5/R6, is applied to the emitter of T1. The collector current of T1, which is proportional to the difference between the input and feedback signals, is fed to the base of T2. This transistor draws its operating current through R8 and R9 and provides voltage gain. Capacitor C6 is a bootstrap capacitor that hold the volta...

A good way to spend a relaxing afternoon is to be in a quiet place with just the right amount of sun or shade, drinks within reach and listening to your favourite songs on MP3 or CD. You doze off and by the time you wake up again the audio equipment has dropped silent due to flat batteries. What a pity! The simple circuit shown can prevent this embarrassing situation by de-actuating a relay when no audio signal is detected for about two seconds. Auto-off for Audio Gear Circuit Diagram The circuit consists of a sensitive LM358 based comparator, IC1A, which keeps monostable IC2A (a 4538) triggered as long as an audio signal is detected at the input. Via coupling capacitor C1 the circuit takes its input signal from the ‘hot’ side of the loudspeaker or headphones in your audio gear. The monostable will time out 2 s after being triggered, the delay being deter-mined by R6 and C3.

This Schematic use IC AN374, this is mono amplifier and have output speaker 1 W with impedance 8 Ohm . Supply need 8Volt to 16 Volt , this Schematic you can use current Voltage 12 V. And better use the stabilizer with 7812 let the voltage stabil. The Effect will be on the sound so smooth. See this Schematic below  and see datasheet IC AN734 : Datasheet IC AN374 Vcc                = 8-16 V Pout               = 1 W RL                  = 8 Ohm Ft                   = 50hz - 17Khz Icco                = 12 mA Package         = SIP2-10 Manufactered = MATSUSHITA

Tiny Audio Amplifier Using LM386 Specifications The Tiny Audio Amplifier kit is a good choice for battery operation. It is based on LM386 IC. Power supply - 6 - 12 VDC Output power - 1 W, 8 Ohm The quiescent power drain is only 24 mW when operating from 6 VDC Self-centering output quiescent voltage Onboard PRESET to adjust volume Terminal pins for connecting power supply, audio signal and speaker Power-On LED indicator ON/OFF PCB mounted slide switch for power supply Four mounting holes of 3.2 mm each PCB dimensions 44 mm x 44 mm Schematic Inputs - Outputs configuration    Parts List  PCB

This is a simple Audio or voice Operated Switch Circuit Diagram. The sound picked up by SPKRl, which acts as a microphone, is fed to transistor amplifier Ql. The output of Ql is applied across coupling transformer T1 and is used to drive the gate circuit of Triac TRl. TRl is used to lend a latching effect to the action of the relay. Audio Operated Switch Circuit Diagram Sourced By: Circuitsstream

Description Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, mainly for mixing mono signals. This design should fulfil their needs, featuring three inputs with switchable high/low sensitivity and unusual level-control circuits, providing high overload margins and low-noise figures, proportional to gain-level settings. Low current consumption due to a simple, five-transistor circuitry, allows the Mini Mixer to be powered by a common 9V PP3 battery for many hours.  Circuit diagram:  Parts P1 = 5K P2 = 5K P3 = 5K R1 = 180K R2 = 2M2 R3 = 750R R4 = 1K R5 = 15K R6 = 220R R7 = 1.5K R8 = 820R R9 = 150R R10 = 100K R11 = 180K R12 = 2.2M R13 = 750R R14 = 1K R15 = 180K R16 = 2M2 R17 = 750R R18 = 1K C1 = 1µF-63V C2 = 100µF-25V C3 = 220µF-25V C4 = 100µF-25V C5 = 220µF-25V C6 = 1µF-63V C7 = 100µF-25V C8 = 1µF-63V C9 = 100µF-25V Q1 = BC550C Q2 = BC547 Q3 = BC557 Q4 = BC550C Q5 = BC5...

TDA1011 - 4W Audio Amplifier Circuit This is 4 watts amplifier circuit diagram for implementing portable radio with TDA1011 from Philips Semiconductor. The TDA1011 is a monolithic integrated audio amplifier in one place-9 in line (SIL) plastic container. The device is specially designed for portable radio and recording applications and offers up to 4 W at a load impedance of 4 W. The device can deliver up to 6 W 4 W to 16 V power load on the network powered applications. The maximum permissible voltage of 24 V makes this circuit very suitable for DC and AC unit, while the application supply voltage of 3.6 V low V enables applications 6.

DESCRIPTION The TDA 1910 is a monolithic integrated circuit in MULTIWATT package, intended for use in Hi-Fi audio power applications, as high quality TV sets. The TDA 1910 meets the DIN 45500 (d = 0.5%) guaranteed output power of 10W when used at 24V/4W. At 24V/8W the output power is 7W min. Features: muting facility protection against chip over temperature very low noise high supply voltage rejection low ”switch-on” noise. Circuit diagram: 10W AUDIO AMPLIFIER WITH MUTING Datasheet for TDA1910: Download

TL071 MOSFET Audio Amplifier    g eneral description:       This simple mosfet power audio amplifier circuit, with TL071 and 2 mosfets (IRF9530, IRF530) power amplifiers can deliver up to 45W on 8 ohm. This schematic is based on Siliconix application and is based on variations of voltage on the 2 resistors serial inserted on the voltage supplier of the operational amplifier driver.  The mosfet transistors must be mounted on a heatsink at least 1K/W.   Amplifier efficiency is 70%, distortions at cut frequency were at most 0.2% at 20Hz on 8 ohm and 10W. With a power supply of +/- 30V the mosfet audio amplifier can deliver 45W on 8 ohm and 70w on 4 ohm. Remember that this audio amplifier is not protected on short circuits so every time you switch on check to see if the speaker is connected. MOSFET Audio Amplifier    Circuit diagram:

Quad Audio Amplifier Circuit diagram with TDA7831 4×25W The afterward is a cloister amplifier circuit (amplifier with four inputs and four outputs) based TDA7381. This amplifier is advised for car audio system, but you can additionally use this ambit for added purposes. This ambit has a architecture actual simple and actual accessible to build.

10W PA.The 10 watts power amplifier circuit by transistor describe here is an audio amplifier with output power of 10W.Used as a low frequency class AB Amplifier. Transistor has high output current and very low distortion. 10W Audio Power Amplifier Circuit Diagram: This 10W audio amplifier circuit diagram using Transistor is good for small room or car audio system.This circuit is a general-purpose 10W audio amplifier for moderate-power PA or modulator use in an AM transmitter. With higher voltages and a change in bias resistors,up to 30 W can be obtained.

This analyst is, a sensitive instrument, in the frequency changes   and width of a acoustic signal. Thus the brightness of LED that turns on each moment of is proportional signal width, while the colour of proportionally frequency. Mini Audio Analyzer Circuit Diagram The circuit input sensitivity is regulated with R2, in order that in powerful signals they turn on the red LED , in the middle the yellow LED and in the low green LED . The display unit, is constituted by 3 lines of 10 LED the every, what is checked by a counter decoder (IC2). Two gates ICa-b, function as the IC2, with the R6 regulate the frequency. When does not exist signal in the input, then no one LED does not turn on. As soon as it will be applied signal, then the LED will begin to blink depending on the rythm and the intensity of signal. Can experiment with the prices of resistances R4, R5, so that you find the value that suits in like your. Initially it can they are placed trimmer 1KO, in the place o...

Overview: AN12942B is an one-chip IC for the stereo speakers which can output 1 W by 8 Ω, headphone amplifiers, line amplifiers, and electronic volumes. The AGC circuit is built-in to prevent the resonance or the vibration by the speaker’s energy and the clipping distortion what is  called "broken up sound".  Also the AN12942B is built-in power saving on/off function automatically detecting input signal to save the power of speaker  amplifier. Circuit Diagram: Audio signal processing

By using the above amplifier circuit you can hear the sound quality is quite good by a high output power. Maximum voltage circuit pa approximately 55Volt DC. 70-140W output power with impedance 8Ohm. Part List R1 = 10K R2 = 1K R3 = 0.4R R4 = 0.4R R5 = 4.7R C1 = 0.015 C2 = 10uF C3 = 220uF C4 = 0.15uF C5 = 220uF C6 = 47uF C7 = 0.047uF U1 = STK050 , STK070

General Description: The NTE1285 and NTE1286 are audio power amplifiers in a 7–Lead SIP type package designed especially for car radio and car stereo applications. These devices are encapsulated in newly developed small packages featuring low thermal resistance, providing easy design for 2Ω. At 14.4V the devices give output power of 7W with RL = 4Ω and 11W with RL = 2Ω. Features: High Output Power Low Transient Noise at Power Supplu Switch ON Mirror Image Pin Configurations Protection Circuits are Provided for the Following: Load Dump Protection Thermal Shut–Down Protection Overvoltage Protection Output Terminal Short–Circuit Protection Pinout: Audio Power Amplifier 5.8W

This schematic very suitable applied on small speakers. Because the maximum output is 3W and the minimum voltage is 12 Volt  , this will make speaker does not damage quickly. If you use speaker with impedance 8 Ohm , you must make parallel circuit speaker don't use series circuit. See This Schematic and datasheet IC AN313 below : Datasheet IC AN313 Vcc                = 12-20 V Pout               =  2x3 W RL                  = 8 Ohm Ft                   = 40hz -18Khz Icco                = 40 mA Package         = TABS6-16 Manufactered = MATSUSHITA Or you can call , Datasheetnya IC AN313