LM386 AUDIO AMPLIFIER
LM386 AUDIO AMPLIFIER WITH BASS BOOST
LOW VOLTAGE AUDIO POWER AMPLIFIER
The LM386 is a power amplifier, designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pin 1 and pin 8 will increase the gain to any value up from 20 to 200. The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 voltage supply, making the LM386 ideal for battery operation. LM386 is a type of operational amplifier (OpAmp). Operational amplifiers have a basic task. They take an input potential (voltage) and produce an output potential that’s tens,hundreds, or thousands of times the magnitude of the input potential
Circuit diagram of Amplifier
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FEATURES
Battery Operation
Minimum External Parts
Wide Supply Voltage Range: 4V~12V
Low Quiescent Current Drain:4mA
Voltage Gains:20~200
Ground Referenced Input
Self-Centering Output Quiescent Voltage
Low Distortion:0.2%(Av =20,Vs=6V,RL=8Ω,Po=125mW,f=1kHz)
This circuit diagram is a cool feature of the LM386 is it as volume control, Gain Control, and an adjustable bass boost to the amplifier using B10k potentiometer. And it probably the best sounding circuit. The bass boost is basically just a low pass filter, and it removes most of the noise not taken out by the decoupling capacitors. 0.033uf and 10k potentiometer for the bass boost circuit in series between pins 1 and 5 of IC LM386, And the actual output power you get will depend on the voltage and speaker impedance. The In this diagram 5v Power supply or 9v battery for the power supply and it works great, voltage MIN 4v MAX 12v. Thank for reading and build your Amplifier Comment below. CREATIVEPLUSELECTRONICS
Components:
LM386
10K Potentiometer = 3
10k
10 ohm
10uf 25v = 2
100uf 16v = 1
1000uf 16v
104 = 1
2A104j = 2
470pf = 1
Vero Board ,/ Pcb Board
8 pins Socket
Speakers
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LM386