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Build a color changing, battery operated LED night light

Build a color changing, battery operated LED night light
A small but mighty battery operated night light.  Select from different solid color modes, or disco flashy mode!  Would also make an excellent bike light.  Built from 7 color LEDs and a dot-it.

I found these LEDs while buying components for another project.  I had an dead dot-it lying around, and was struck by inspiration. 

I made a video, since photos don't really do it justice.  Check it out.


 
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Step 1Materials

Materials
I started with three 7 color flashing LEDs, three 51 ohm resistors, a small round circuit board, and a SPST momentary push button switch from Radio Shack.  You'll also need a "Dot-it" LED battery powered light.  From your toolbox, you'll need some wire for jumpers, wire cutters, needlenose pliers, technical screwdrivers, solder, and a soldering iron.  I found a glue gun, a set of "helping hands" (a stand with a magnifying glass and alligator clips,) and a desoldering iron helpful, but they aren't crucial.
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5 comments
Oct 7, 2011. 7:17 PMhewstigator says:
Thanks so much for this Jenn!!! just completed the project.

Found little wire snips worked like a charm to cut the PCB down to size... (for those too impatient to sand)

the hardest parts (for my simpleton brain) were (a) figuring out the right place to jam my flathead screwdriver to pop the cover off (i spent a little time mauling the silver casing at first before i realized what i was doing... ended up noticing there is even a little notch that helps you pry off the cover correctly haha, doh!) and (b) properly insulating everything so that when i crammed everything back together there would be no shorts...

but all in all, those were only minor hurdles, and i am really digging this thing - thanks again for this great tutorial!!!!!!!
Jun 3, 2010. 11:51 AMasporkable says:
I got a little lost on the wiring step. Any chance for a wiring diagram?
Jun 7, 2010. 10:34 AMasporkable says:
Ok, I think I've got it. Helps when I realized these are three legged LEDs, not the two legs that I've currently got in abundance. I need to learn to read lol
May 25, 2010. 5:59 PMcrazyg says:
didnt know leds could do that

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Author:Jenn Nelson
I like to make stuff. I teach stagecraft to high school kids, and have won some awards for it. In my dream world, I will get to make wacky stuff all day and teach other people how to make wacky stuf...
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