No we're not stealing musical beats of any kind but we are going to make leds flash to music using a joule thief circuit with a slight modifacation

Step 1: finding parts

you could buy parts or salvage them like I did , but anyways you need :

toroid bead
3.5mm audio jack
thin wire
led (any colour)
270 ohms resistor (red,violet,brown,gold)
s9014 transistor or equivalent
stripboard (optional)

( http://www.datasheetcatalog.org/datasheet/auk/STS9014.pdf ) datasheet for the transistor.
&nbsp;I think I blew up my transistor while soldering ( way to hot ) and the transistor is actually emitting sound... O_O I can hear the beats of my music from the transistor<br /> <br />
you should deffiently put that on youtube =D<br />
&nbsp;<br /> Fixed the problem by reversing the resistor and ground. :P
would a bc108 c work??? ZZZZ
see no reason why not, try it
I have just made the 'standard' JT I have no resistor before the base and I am using a bc108c. It only works with AAAs not AAs it just flickers with AAs. Current overpowering tran??? ZZZZ
try it with a resistor you need it to determine the current output of the transistor ....... i think
I made a MBT and it works, I even split the audio so i can listen and flash! Although it only flashes at a painfully high volume, is it my bc108 (do I need a low voltage transistor) or have I got the wrong amount of turns on my toroid??
Well done on making it, i think a lower voltage transistor would be best you want a lower emitter - base voltage to get it to flash at lower volume.
ok thanks
can you post a video of the LED flashing to the music?
The solder DID ruin the photo - the camera focused on the solder instead of the project! ....USE MACRO MODE FOR CLOSEUP PHOTOS!!! :D If you don't have macro mode, then since its gonna get sized down by instructables, then take a picture, in focus, from farther away - then crop it. Pictures aside - neat project! Extremely low lowpass filter :D
We have a photographer in here RESPECT
Restecpt. Ali G... IN DA HOWS!
hmm. I wonder if anyone knows(or knows how to calculate) the resistor value to put one of these IN-LINE with a headphone speaker. I'm thinking a nice blue led synced with the music on my headphones. I get music, and the people around me get a light show!
the solder didnt ruin anything... ...the picture already was ruined! (Just kidding!!) Very cool!
Very good and clear. I like the new use for the JT. Thanks.

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