Help : LM386N Amplifier


Hey guys. I'm new to these forms so please bear with me.
I am very new to Instructables and this is my first project.
I am currently working on THIS INSTRUCTABLE: https://www.instructables.com/id/Portable-Guitar-or-iPod-Amplifier-Amp-9v-LM3/?ALLSTEPS

All I did is connected all the components as shown in the link. What I decided was to use an aux cable to connect my phone to input jack and connect my computer speakers to output jack. After connecting the 9v battery and connecting phone and speakers, all that happened was that led lighted up slightly and no sound from speakers. The moment I turned the volume of phone to maximum , LED started blinking still no sound. Plz help......:( 

Any help would be greatly appreciated! Thank you :)
Sorry for bad English...:(

Picture of Help : LM386N Amplifier
F56LOX1G2HDWDQA.MEDIUM.jpg
image_2.jpeg
image_3.jpeg
image_4.jpeg
images (2).jpg
G4224T3 years ago

It looks like you have modified the circuit to include an LED & Resistor (for power indication I assume). You seem to have connected them in series with C3 and +V for the IC which probably won't work. Try taking them out (or connect them directly from the battery to 0v for power indication) and see if that helps.

Angads25 (author)  G4224T3 years ago

First of all thanks for responding.... It still didnt worked....:(

Going by the drawing and the bread board no feedback loop or gain.

There should be a resistor on the input of the opamp and a resistor from the opamp output to the input for feedback loop and gain.

Like the drawing on this page

http://www.marineinsight.com/tech/marine-electrical/amplifier-circuit-or-operational-amplifier-op-amp-used-on-ship/

Joe

Angads25 (author)  Josehf Murchison3 years ago

Thanks a lot for responding.... I ll try this out.....:)