LM386-amp power problem

I have built an LM386-amp from the schematic in Nicholas Collins "Handmade electronic music". It works fine with a 9v-battery but when I use a Roland guitar pedal power supply (several outputs) my chip is ruined. Does someone know how I can get this to work with a DC-adapter?

Topic by daaaaavid   |  last reply


Why is my iPod amplifier circuit fuzzy? Answered

I used an LM386 audio amp with its usual circuitry to amplify signals from an iPod headphone jack, but the sound quality is terrible. I have tried powering the circuit with a nine volt battery, and with a wall wart, and, although sound quality was better with the battery, it was still pretty bad, and not very loud. I have tried different LM386 chips, and a speaker that I know is of decent quality, and the sound is still bad. I have also used a filtering capacitor in series with the decent speaker, and the quality was okay, but the sound was very faint. Sometimes with the wall wart I got a weird buzzing noise, and with either the battery or the wall wart I often get unpredictable gain from the amp and bad sound. My speakers are around 2-21/2 inches in diameter, and around 10 Ohms, and the decent speaker is of unknown dimensions and around 9 Ohms. I also tried one of Kipkay's homemade speakers, and, no offense Kipkay, but it all went badly after that, probably because my homemade speaker was only 4 Ohms, when it should have been 8 ( The speaker is not Kipkay's idea, he credits it to Jose Pino, from Make Magazine, vol. 12). I'm also using generic 24 guage wire, not speaker wire, could that be the problem? Please help! Thanks! P.S. I tried to make one of those big LED's sync to the music, but ended up burning it out with the wall wart, will the smoke hurt me? Thanks!

Question by mad magoo   |  last reply