Instructables

RGB LED Moodlight in 10 minutes!

Here is my 2nd. Instructable. A very quick one! ;-)

I will show you how to build a nice 3-RGB-LED mood light in nearly 10 minutes.

What did you need?

- battery powered LED touch-light
- slow rainbow effect RGB LEDs with slow automatic color cycling (or fast if you like ;-)
- small screw driver (depends on your LED touch-light)
- soldering-iron
 
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Step 1: Look what is inside the touch-light

First I remove the batteries from the bottom side of the lamp.

With my fingernails I can grip between the upper silver and the lower black part and simply lifting it up.
Then the rest of the parts dissolve them self. Really cheap build lamp ;-).

On the 3rd picture you can see the small PCB with 3 white LEDs and in the switch in the middle.

Step 2: Heat up the iron

Picture of heat up the iron
Now you should remove the 3 LEDs with your soldering iron.

Then replace the three LEDs with the rainbow LEDs.
Don't forget that the long legs of the LEDs are the anode pins. They have to connect to the positive voltage.
Pineapple_D5 years ago
I know this sounds stupid but how do you change the colour? do you press it or what???
WattSekunde (author)  Pineapple_D5 years ago
The LEDs are automatic colour changing LEDs. Each of them has 3 LED chips inside red, green, blue and a control circuit chip. (You can see these chips on the first picture with the macro shot of one of those LEDs. under the lens you see the control chip and on the lower side you see the three LEDs. Thank you for your interest.
Radio Shack sells an RGB led that changes color when you connect its ground and trigger pins together. You can put a push button between them. Here is the link if you want to check it out.

http://www.radioshack.com/product/index.jsp?productId=3060680&numProdsPerPage=60
mnc Pineapple_D5 years ago
there is different kind of leds changes colour according to:
  • depends on time, (changes by it self)
  • electric way if you swap + and - it changes colour
  • according to watt/volt im not sure.
MilotisX mnc5 years ago
hey do you know the name of the second type you mentioned??
Derin MilotisX5 years ago
bicolor led
mnc MilotisX5 years ago
sorry I don't know, try to asking "low power colour changing led" or "two colour led"
cokecola4 years ago
The first image looks real cool, is that just a drinking glass over the top of the lite?
No its a single LED taken very close up.
Dryank045 years ago
so is there a difference between a RGB slow flash LED and a RGB color cycling (slow)? i cant find one that says color cycling they all tend to say 'flash' but flash makes me think it wouldn't be a smooth transition to the other colors.
I got some slow flash rgb leds from ebay and they fade slowly from one colour to the next but the fast flash rgb leds I got at the same time flash real fast from one colour to the next and just give you a headache. Sureelectronics sell them in lots of 100 with 100 X 470ohm and 100 X 100ohm resistors but that is a lot of leds.
You can get them individually here (on sale right now also).
http://alan-parekh.vstore.ca/product_info.php/products_id/88

There is a video that demonstrates the RGB LED color cycling, fast flash and slow cycle in one device.
johnny q5 years ago
where do you get the touch light that you are starting with ? What type of store would sell one ? The raw light itself looks really neat, kinda like a crystal ball. I haven't tried any projects from here, but this one could be the first. I sure like it.
A lot of drugstores have them
WattSekunde (author)  johnny q5 years ago
I found them in a "Baumarkt" here in Germany. Very cheap no name 3-Pack. You can buy similar from Amazon, etc. Search for Tap Lights. Thank you!
woodswalker5 years ago
I'd like to build a small LED art piece from scratch using the drawing above. What voltage of battery are you using? (with no resistors I'm guessing it's 4.5?)
WattSekunde (author)  woodswalker5 years ago
Yes, the lamp has 3x1.5V battery inside. But there is a resistor on the PCB. You can see only the shadow of it in the upper right side on the picture in step 3. The resistor has 10 Ohm and connects the red cable with the middle pin of the switch. Thank you for your interest.
didibemi5 years ago
really nice but i think you can buy that rings or others that have this device. they're cheaper. aushuashuashasuhash
Wonderful Work! Congratulations!
WattSekunde (author)  Carlos Marmo5 years ago
Thank you very much!
prototype275 years ago
Very cool! I actually use these all over the place as accent lights, but instead of diffusing with paper under the lens I just scuff it up a bit with sandpaper. Good job.
WattSekunde (author)  prototype275 years ago
Yes, sandpaper was an alternative way but could not removed ;-) Thank you for your comment.
I have all the parts I need to make this. Never thought about make something like this. It's cool and simple. Thanks
Nice to hear. Thank You!
Paulcet6 years ago
Where does one find the 'automatic' RGB LEDs?
WattSekunde (author)  Paulcet6 years ago
I bought them on eBay.de 25 x 5mm 3-Chip RGB Rainbow LEDS - RGB slow(!) for 9.99 EUR.
Pretty cool! It is as if you diffused the LED. ;-) And wow, look at the related Instructables.. most of them are all black in the back!
WattSekunde (author)  GorillazMiko6 years ago
Thanks! No, I decided to buy and use water clear LEDs. So I can decide later to diffuse them via semitransparent paper or sanding the LED themselves. Yes it's tricky to get nice pictures from the bright LEDs and the surrounding area! The digicams don't have enough brightness dynamic range. I'll try to add a short movie...
Pyrowuzzup6 years ago
thats a good idea reusing the touch light body. do rgb leds always start on the same color or do they go out of sync with eachother?
My RGBs start at the same color and then eventually go out sink after a while.
Eventually theyll probably get em where they all stay synced.
WattSekunde (author)  Pyrowuzzup6 years ago
Thanks! They start all with red. after a few seconds they run more an more out of sync. Same as joejoerowley wrote. But they run only a simple color scheme: R -> G -> B -> R+G -> G+B -> B+R -> R+G+B -> then start again with R and so on... The color changing is always after nearly 3 seconds and needs less than a second. Then its around 2.x seconds stable. With three LEDs out of sync you get a more colorful and continuos changing light effect.