AN7112 Schematic 0.5 Watt audio amplifier

Description:

• The AN7112 is a monolithic  integrated circuit designed for 0.5W audio power amplifier.

Features:

• Wide operating supply voltage range: Vcc= 4V...14V
• Low quescent current ICQ = 15mA (at Vcc=6V, RL=8Ohm)

100 watt Hiwatt amplifier model DR 103 power supply schematic circuit diagram

Description :
100 watt Hiwatt amplifier model DR 103 power supply schematic circuit diagram

100 watt Hiwatt amplifier model DR 103 power supply schematic circuit diagram

100W Audio Amplifier Transistor used BDW83D - BDW84D circuit diagram

100W Audio Amplifier Transistor used BDW83D - BDW84D circuit diagram         

Here 100 watt power audio amplifier which using power transistor BDW83D and BDW84D. Copyright belong to Smart Kit.

Schematic diagram:

Component part list:

R1 = 1,2 K                                   D1 = 1N4002-7  

R2 = 0,47 OHM                           D2 = 1N2002-7  

R3 = 220 OHM                            D3 =  1N4148     

R4 = 3,9 K                                   D4 = 1N4148      

R5 = 2,2 K                                   D5 = 1N4148      

R6 = 2,2 K                                    D7 = 1N4148     

R7 = 10 K                                    D8 = 1N4148      

R8  = 4,7 K                                  Q1 = BDW84D   

R9 = 150 OHM                            Q2 = BD829       

R10 = 39 OHM                            Q3 = BC546       

R11 = 3,3 K                                  Q4 = BC556      

                                 

Audio Amplifier Circuit using uPC1318AV

Audio Amplifier Circuit using uPC1318AV

Audio Amplifier Circuit using uPC1318AV

Audio Amplifier Circuit using STK083

Audio Amplifier Circuit using STK083

STK083 Audio Amplifier Circuit

10 Watt Car Audio Amplifier

10 Watt Car Audio Amplifier

TDA2003 is audio amplifier integrated circuit chip in 10 Watt class. All you need is just adding few passive components and your amplifier will be ready. You can even amplify ultrasonic range if you wish to abuse its usage, just to convince you that this chip is more than enough to handle any range of audio signal. Although many manufacturer produce this TDA2003 chip, in general, this various chip from various manufacturer normally comply with these following features: Short circuit protection between all pins, High current output ( up to 3 A), Built-in Over temperature protection, and Low harmonic and crossover distortion.

source :http://freecircuitdiagram.com/2008/08/04/10-watt-car-audio-amplifier/

Car Stereo Booster with LM2896

Car Stereo Booster with LM2896

This car stereo booster uses an LM2896 IC which has two integrated amplifiers. It can be powered with voltages up to 15 volts. The power output is 2.5 watts per channel with an 8 Ω load and supply voltage of 12 volts. Using the bridge tehnique in the circuit gives a power output of 9 watts. The car audio booster can be powered up from 3 up to 15 volts.

Car stereo booster circuit diagram

The load impedance that can be connected at its output can be either 4 Ω or 8 Ω. The supply voltage and the load impedance influence the output power level. This amplifier circuit is designed as a booster for auto radio/cassette players. The current consumption by maximum power output and a 4 Ω load is 1 ampere.













more info and source : http://mycaramplifiers.com/car-stereo-booster-with-lm2896-395.html

200 watts amplifier TDA2030

200 watts amplifier TDA2030

TDA 2030 is produced by SGS Ates and is a complete audio amplifier. AB class of the final amplifier cand deliver up to 14W on 4 ohm at a +-14V power supply.


Connecting two TDA2030 thru cheap power transistors we can create a amplifier wich can deliver a higher power. With the components value from the schematic the total amplifier gain is 32 dB. The speaker can be 2 ohm instead of 4 ohm if we use the TIP transistors. With a proper designed power supply this audio amplifier can output 200W.
 
Active components:


IC1, Ic2 TDA 2030

T1, T3 = BD 250, TIP 36

T2,T4 = BD 249, TIP 35

D1 … D4 = 1N4001
source:http://mycaramplifiers.com/200-watts-amplifier-tda2030-8.html

STK4132II - Schematic audio amplifier - power amplifier 2x20w

STK4132II - Schematic audio amplifier - power amplifier 2x20w

STK4132II  - Schematic audio amplifier.STK4132II  power audio amplifier schematic

lm386 amplifier circuit

lm386 amplifier circuit

LM386 UTILITY AMPLIFIER

parts list




C1, C2 10uF 16V electrolytic

C3 .1uF capacitor

C4 .05uF capacitor

C5 220uF 16V electrolytic

R1 10 ohm 1/4w resistor

U1 LM386 amplifier

VR1 100K "A" taper pot

SPKR1 8 ohm speaker

15 Watt Mini Amplifier

15 Watt Mini Amplifier

Notes:
This amplifier uses a dual 20 Volt power supply and delivers 15 watts RMS into an 8 ohm load. Q1 operates in common emitter, the input signal being passed to the bias chain consisting of Q8, Q9, D6, D13 and D14. Q8 and Q9 provide a constant current through the bias chain to minimize distortion, the output stage formed by a discrete darlington pair (Q2,Q4) and (Q7,Q11). The last two transistors are power Transitors, specifically the 2N3055 and MJ2955. The 7.02K resistor, R16 was made using a series combination of a 4.7K, 680 Ohms, and two 820 Ohms. The 1.1K resistor, R3 was made using a 100 Ohms and a 1K resistor. You can use this circuit with any walkman or CD player since it is designed to take a standard 500mv RMS signal.

10 WATT LINEAR AMPLIFIER

10 WATT LINEAR AMPLIFIER

TR1 = 2SC2078

TR2 = 2SC2078

TR3 = 2SC2078

TR4 = TIP31