This WAS going to be my entry to the 'Get the LED Out contest', but I was too slow.

I was bored one day. I wanted to build something cool. A quick bit of brainstorming and nothing came up. Digging through my junk boxes, I found a old level meter kit. I went over my mate's place later that day and we were having a killfest in Halo 3. He had seen this Level kit in use before, and wanted it rebuilt into a full-blown system to complement his surround system.

Here I'll guide yo on how to make your own.

Step 1: Parts

For this Project you will need:

Scrap wood
LED level meter kit (available here)
LED's of your choice.
power supply
Diodes (if using AC output supply)
10 X BC558 or similar transistors.
So where's the schematics ?
Soo a few things<br><br>1. What's the potentiometer for? <br>2. What is the audio input source? Like a regular 3.5mm input jack?
Now just to be clear, is this for a power level?
hey what's the difference with these two chips? LM3915 IC chip LM3916 IC chip
is it possible to do this with more LEDs?
yeah, just make sure your transistors can handle it. even better, replace the LED's with relay's. then you can put as many lights as your relay can hold!!! I'l send you a circuit diagram if you want.
if you could send me a circuit diagram that would be AWESOME
k. I'l P.M you something soon.
If you did make a circuit diagram, would you mind sending one my way too?&nbsp; I love this idea but really want to make one with a bunch of LEDs per sounds level!&nbsp; Thanks<br />
Could I Please have a circuit diagram too?
where were you able to pick up the LEDs?
i got them from my local jaycar store
Dude, you're freaking awesome! Your stuff is amazing, I really like it, I hope to see more, this one is just really cool. Maybe you should have made the LEDs rainbow colored? No-- even better. RGB. Nice job anyways, I just have 3 more things to say to you. 1) +1 rating. 2) (added to favorites) 3) You should post an Instructable on how to make fudge.
you like it? ok then, be prepared for an onslaught of instructables. Turbocharged go-karts, remote control docks, huge cinema displays, and awesome spud cannons. My aim is to get featured, as it will greatly boost my pageveiws. I'm in a contest against myself. You have been warned!
G'day mate I'm lookin forward to it Great I'ble
Where's the project schematic? Where's the (BC558 or equivalent) transistors in the parts list? Your instructions in step 4 don't say what side is up when you cut the leads and the pictures are hard to see that the flat side is up when cutting the right 2 leads (base and emitter) short. For anyone substituting transistors, be sure of the pinout, since the 2N3906 has a reversed (EBC) lead order from the BC558 (CBE).
It would be great to stick one of these in to the case of a pair of speakers behind the mesh that covers the cones. Would look fantastic on a guitar amp too!
yeah. this design is so flexible. once you have built the board, you can mount it anywhere. it is only 80mm x 28mm x 9mm. The led's can be aranged in any order, too, so it doesn't have to be 1 - 10. I have done before 5,8,1,3,7,6,2,9,10,4. it looked really cool.
My favorite bit was the hack to stick a transistor's base-emitter pair into an LED hole, leaving the collector for switching a bigger load.
thanks for your comment.

About This Instructable


26 favorites


Bio: I like electronics.
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