LM386 Audio Amplifier

This is a build video of a very simple audio amplifier based on the LM386 chip. It can be built for less than $20 and used to amplify any low level audio signal including a guitar, bass or mp3 player.

Category:

Science & Technology

Tags:

• LM386
• audio amplifier
• DIY
• electronics
• circuits
• oscilloscope
• guitar amp
• bass amp
• mp3 amp

[kane100574]

Mines pretty noisy :(

Any ideas to check/get rid of so much noise? Every thing seems secure connections wise...

[HackaweekTV]

@kane100574 Try reducing the signal level at the input.



[militaryson94]

Just learned to read schematics. I didnt see how you added in the 1.5mm Jack for the guitar. Can you post a schematic or show how you added that in? Thank you for this video, Really neat. Now just to make some stomp-boxes out of it xD

[HackaweekTV]

@militaryson94 You just connect the positive output signal to the part of the jack that goes to the tip of the plug, and connect the ground of the circuit to the other terminal near the ground ring on the jack.

[Youcansuckme69]

What exactly is the purpose of a 'decoupling capacitor'?

[HackaweekTV]

@Youcansuckme69

From the Wikipedia post:

"A decoupling capacitor is a capacitor used to decouple one part of an electrical network (circuit) from another. Noise caused by other circuit elements is shunted through the capacitor, reducing the effect they have on the rest of the circuit."

[JollyjuicyfruitX]

i wanna do a 2 speaker set up, with your schematic would i be able to put power and ground of both speakers into pin 2 and 3? or would i want another lm386 and carry over volume controls and everything to the second ic? just wondering if the setup for the one IC would work without anything getting destroyed or sounding nasty.

[SajjadBro]

where do u get these background musics...i love them :)

[TheOffPowerZero]

yeah put in the soup tonight at supper love it!!

[Cristi0986]

heloo these amplifier i can use to a geiger counter?PS,srry for my englesh

[kolokoy389]

that is a singel channel audio amplifier inside of box.. MP3 player is a 2 channel audio output (STEREO) you mean mix a 2 channel output your MP3 Player?

[cerbat]

May I know the title of the music?

[andersonblum]

Very good, but I have a doubt. where is the input of the circuit? if possible, post the schematic to the change, ok?