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help with leds and ohm resistors? Answered

im trying to make custom headphones from scratch, inspired by the daftpunk helmet of guy, and i want an led lightshow on my headphones. ive been researching how to do this, but ive heard that having an m3 or any kind of audio player wouldnt be enough power to support the leds? ive also heard that if you solder the leds straight to the wiring of the headphones if can create a short, and that placing the led on a circuit chip would help. however i know nothing about ohm resistors or circuit boards. i was thinking i could use an ohm to amplify the power from the audio player to support the leds if its even possible, and running wire through the headstrap to  solder the circuitboards with the leds on them. i need help. alot. any input is wanted, thanks!

(ps:
- does anybody know how much power i need to run a single blue led?)

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andy70707

8 years ago

Audio players only output a few milliwatts, not enough to power an LED. You will have to use transistors and an external power supply to do this.

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seandogueandy70707

Answer 8 years ago

+1

Make sure the load presented by the monitoring transistor/opamp is relatively high-impedance, perhaps 100 times or more the load resistance of the expected hesadphones

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janw

8 years ago

Check this intructable out. It is an easy way to create a ledshow from audiolines.