LM386 audio amplifier circuit with PCB

This is an audio amplifier that can be used with a small 9 volt Battery Operated,Current use as little as 5 milliamps.And amplification up to 500 mW.

Which is sufficient to expand the sound from a sound about or the CD Walk Man out to the small speakers clearly.

When entering the power supply 9-volt circuit IC1 number LM386 amplifier IC size is 300-800 mW, Depending on the power supply circuit with,This is from 4-15 volts.

LM386 mini audio amplifier circuit
Figure 1 the LM386 mini audio amplifier circuit

Once entered into the input pin 3,The non inverting pin to amplifier non-return phase.C1 will be served cut out the noise input to ground, and C2 increases the rate of amplifier,C2 is to add more value.

But if the C2 Too much distortion (the C2 should not exceed 100uF).

The output of IC1 is out of the pin 5 through C4 coupling audio signals to better and DC block and not passed to the speaker.

For the audio portion will also be fed back through R2 and C3 to the high frequency response better.

How to builds
This circuit, you can easily make it with see PCB layout and the components layout in Figure 2

Figure 2 the PCB and components layout of the LM386 audio amplifier.

Next circuit ideals that use LM386 IC.

LM386 mini amplifier

Amplifier 500 mW with ic LM386N

This circuit number LM386 IC is used as the IC, which is popular is that it has. It is a simple circuit. Less equipment items. Suitable for use or used in small trials.
The properties of the IC can be used from 4V-12V power supply for low current at 50 mA only. And the frequency response from 40Hz – 100 kHz rate of expansion of 46 dB and distortion.
Less than 1%.

Amplifier 500 mW with ic LM386N

When entering the power supply light LED1 circuit to tell the operating environment of the circuit. C6 and C7, with a page filter to smooth then be entered through one input sound signal.
C1 coupling signal protection dc voltage noise in circuit to the sound signal that is transmitted through VR1 for controller level reputation of sound signal and then sent to the input to pin 3 of IC1.
boost up output at pin 5 through C5 for protection dc voltage and meet the low frequency better and send out put speakers. The C4 and R1 is acting eliminate noise signal out and the pin 1 of IC will have a jumper for. to access the C3 to boost up rate increase in case the circuit to be used to boost up signal is very small.

10 thoughts on “LM386 audio amplifier circuit with PCB”

  1. Hi, I want to know how to give input, and can I use 3.5mm jack to input and use it with mp3 player

  2. Hi! nice site i would like to ask ..Where i can find the block diagram or schematic diagram for making amp for tweeter and low driver

    High > need amp driver
    Mid > already have sound standard ex1200
    Low > need amp driver

  3. hello my name is mike , i am working on the project using the 555 ,but can anyone tell me which pin is whih and wheres does everything connect to because i have no idea where to connect each component to its belonging pin, if anyone can help please comment as soon as possible, thank you

  4. Hai can we connect two stage ic lm386 amplifier please send me circuit diagram of it to connect these stage with filter circuit and you site give very simple circuits thangs send me answer in my mail

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>