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LED Music v3.0

1). LEDs
2). Transistor TIP31
3). 3.5mm Stereo Jack Plug
4). 12V adapter or 9V battery
5). Plexiglass

How can i get that schematic to work with color changing leds because when i tried it they only flashed one color
how many leds I can use with a single 9v battery?
I use 11 Leds connected parallel. If you want to connect the Leds i series this is the formula -> adapter output voltage / LED voltage = Total LED's
can i use a sensor here instead of stereo jack plug ? :)
when you plug it in, can you hear the music or did you have it playing off something else?
You will need audio split adapter (http://www.amazon.com/Spliter-Adapter-Supports-Microphone-Function/dp/B00812V25Q/ref=sr_sp-btf_title_1_12?ie=UTF8&qid=1378719396&sr=8-12&keywords=audio+split+adapter )
do you need and resistors?
No, you don't need.
Nice!, so you had a lot of wires soldered to the middle pin of the tip31 transistor, and to the positive end of the battery? and with 11 LEDS you didnt need any resistors for each parallel led circuit?
Yes there are a lot of wires soldered to the middle pin of the tip31 transistor and to the positive end of the battery.
very cool! do you have one LED in each pexiglass, which you have 11 of them, and is just connected in series, but just in each separate pexiglass?
Thanks. There is 1 LED in each plexiglass, the LEDs are connected parallel.
can i try it with tip42 transistor ???
You can try it but I don't know if it works. –źnalogue of Tip31 is 2N6123.
am... am I missing something?
What he has done is re-created/re-designed motadacruz's project: https://www.instructables.com/id/Music-LED-Light-Box/ <br>Although, the circuit is missing the resistor for the LED's. <br>Could go a step further and make it stereo in the re-designed circuit by Ovrlrd: https://www.instructables.com/id/LED-Light-Box-Modified-Circuit-Diagram/ <br>Although, the circuit is still missing the resistors for the LED's. <br> <br>This might have been a better concept if he had integrated dmallen's VU meter project into this one: https://www.instructables.com/id/VU-Meter/
am... am I missing something?

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