Introduction: How to Build a LED Mood Lamp/ Solder Safety Light

Picture of How to Build a LED Mood Lamp/ Solder Safety Light

How many times have you burned down your house because you forgot to turn off that Soldering Iron or glue gun? Well I have never burned down my house (and hopefully you haven't either) but in this instructable I am going to teach you how to build a LED mood light that can also be used a Solder Safety light. Basically you can plug this light into a power strip that has your soldering iron and glue gun plugged into. That way you will see the light on your way out reminding you, that you forgot to turn off your soldering iron and or glue gun. This is a cheap, easy, safe, and quick instructable that most people will enjoy.

Step 1: Materials and Tools

Picture of Materials and Tools

Electrical tape- Any kind will do as long as it is an insulator.
LED- Any color or size. I used a 10mm RGB (Red, green, blue)
Wall Wart/ Power supply- This is really important. Make sure you have one that supplies the correct voltage and amperage. I used an old one I found in my basement.
Input: AC 120v~60 Hz 4W
OutPut:DC3v--- 200ma 0.6 VA
Wire Cutters and Strippers
I used my MAKE: Warranty Voider - Leatherman "Squirt" E4 (electronics version) Pocket multitool. (BTW this is the best Mulitool I have ever owned!!!) Its the best!

Step 2: Prepare the Wall Wart

Picture of Prepare the Wall Wart

The First thing you have to do is cut off the plug at the end of the wall wart. Then separate the the wires and strip then. Strip about 2cm off of each wire.

Step 3: Attach LED and Tape/ Conclusion

Picture of Attach LED and Tape/ Conclusion

Now all you have to do is attach the LED legs to the wires. Make sure that coordinate the Positive Side of the LED with correct wire of the wall wart. Then tape it up! Your done. Now just plug it into the power strip that you have your soldering iron and/or glue gun plugged into and you have a safety light. You could use a White LED and use it as a work light potentially. Now you have a great mood light or night light. Please rate and comment this instructable and check out my other instructables. Feel free to ask any questions. Thanks for reading
Joe R


lpdunwell (author)2011-01-14

also an unregulated wall wart with the specs 3V/200mA will output 3V if you actually use 200mA. Free running (~0mA, or 20mA etc.) it WILL be more than 3V...

Timmy P (author)2008-12-29

how do you get it to change colors?

Win7Maniac (author)Timmy P2010-02-04

You use an RGB LED with a microcontroller (ie Arduino). He didn't explain how to use it here.

akatsuki666 (author)2009-02-25

you guys are smart. can i hook up a rgb led in parallel with the different colors such as: green to red , red to blue . and blue to green pls respond ty.

Patrik (author)2008-01-23

Ah - the Soldier Safety Lamp - how to protect our boys in Iraq with a simple LED!

Hint: "solder" does not have an "i"...

joejoerowley (author)Patrik2008-01-23

Damn it. Now I feel stupid. well thanks. i changed it.

Patrik (author)joejoerowley2008-01-23

That's ok, it gave me a chuckle on a cold and dreary morning. ;-)

zachninme (author)Patrik2008-01-26

Thank you, I thought they were spelt the same, myself :P

Patrik (author)zachninme2008-01-26

Spelt is spelled with a t.

Ok, I'll shut up now... ;-)

Tailslvr7_7 (author)Patrik2008-02-15


zachninme (author)Patrik2008-01-27

well k i messd

Sorry :P

paulplaysguitar (author)2008-01-23

Cool concept. Thanks.

GorillazMiko (author)2008-01-23

Smart. I always do this with the 9volt thing.. but I don't cut it open. I just put the LED in it.. and it works. But, last night I was bored, so I did that. The green LED turned yellow. Then orange. Then red. Then smoke started coming out. Then more. Then more. It was getting really red and blackish. I took it out with my fingers really fast. Too bad, it was super hot.
The thing was still smoking after that.
A waste of an LED, but a fun 2 minutes!

Yeah. Thats not a great idea. I imagine you used a way over powered power source. Not a good idea. You are lucky that it did not explode into tiny molten hot plastic shrapnel bits. Now thats how you put an eye out. :) Be careful I dont want to lose another instrutabler.

gamer (author)2008-01-23

what voltage/amperage was the wall wart?

joejoerowley (author)gamer2008-01-23

As it said in the instructable AC-DC Input: AC 120v~60 Hz 4W Output:DC3v--- 200ma 0.6 VA

that mean 3 volt and 200 mil amps . Thanks

gamer (author)joejoerowley2008-01-23

thats 10 times as much as ur led can use, its dangerous, and i personally know that when it says 3 volts, its really 5 and a half witha small load, u should consider resistors, or better yet, lm317. -gamer

joejoerowley (author)gamer2008-01-23

Yeah. You probably right. Maybe it would be safer to run a few LEDs in parallel to the power source.

gamer (author)joejoerowley2008-01-23

no, i dont mean that, but if you wanna do that, put a resistor oneach individual led

Patrik (author)2008-01-23

Wait, so this is just a LED hooked up directly to a wall wart? If so, it's rather ironic that you demonstrate it pliugged into a power strip that already has a warning light!

Two suggestions for improvement:

- Instead of cutting off the 3V power plug from the adapter, buy a female 3V plug and hook up the LED to that. This way, you can still use the wall wart for other uses if you need to.

- As always, a current limiting resistor in series with your LED is highly recommended - it will prevent the LED from burning out, and thus greatly extend its lifespan.

About This Instructable




Bio: My name is Joe. I don't use this site that much anymore because I am lame but you will find some my instructables from ... More »
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