Im building a coffee table that i wanted to have lights that would sync to the music i was playing or the games i would be playing. Did some research and found this was the best way to do (coffee table will be a later instructable).
- 1 x TIP31 NPN Transistor - Radioshack # 276-2017
- 1 x 1/8" Audio Jack - Radioshack # 274-0249
- 1 x Toggle Switch (i used a covered one because i thought it looked cool, but any will work) - Radioshack # 275-601
- Roll of LED lights (or whatever you plan to use for lights) These are the cheapest i found and they included a power supply
- Breadboard

Here is video of them in action

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Step 1: Build the circuit

I built mine really small so i could fit it in the case but you could make it bigger so all the wires arent jammed together.
Cut a piece of breadboard to the size you want to build your circuit on.
You will also need to desolder the 12v end from the LED strip to be able to wire it into your circuit.
Wire two leads onto where you remove the 12v end from

Step 2: Wire Switch and Audio In

I used crimp on connectors so the switch could be taken out if needed but you could solder the wires on directly.
The audio is only wired in from one channel, i used the left channel but you could use the right. I eventually want to have two circuits set up and have different colored lights for each channel.
usbg3rd1 year ago
a video will be appreciated :)
joshmt2012 (author)  usbg3rd1 year ago
there is a video on the first page
thank u for mailing the link to the video :)
nice project indeed
there is a blank space and no video is visible , can u please give the link of any site it is uploaded on ?
joshmt2012 (author)  usbg3rd1 year ago
heres the link
DIYPieter1 year ago
I am relatively new to this
I followed your circuit exactly but nothing happens
Do u know what my problem might be

Sorry other comment was not clear. What i was trying to ask was if the leds do not come with a power source like the ones you used would i be able to use a 12v source from something else and still connect it the same way you did here???. Sorry if i was confusing.
Yes a top view would be good also just wondering if the lights do not come with a power source would i still do it the same way as you did with the adapter??
hey im new to this whole thing of circuits and just starting out. I have tried out a few instructables and have done well for a beginner. I was wondering if you had a better picture of how everything went together or if you could explain a little better to me.
joshmt2012 (author)  Guysmiley861 year ago
i can take some pics of whatever you want. do you want a top view of the circuit or something?