Introduction: Easy Christmas LED Project! Fun to Build!

Picture of Easy Christmas LED Project! Fun to Build!

          Here is an easy and fun project for the holidays that you can show non-electronic enthusiasts friends without them saying: "I have no idea what you were talking about..."

Step 1:

Picture of

===Needed Items===

~Power supply

                 (preferably 5v but anything from 4 volts to12 volts will work)
~2 Red and 2 Green LEDs
~555 timer IC

                  (IC stands for Integrated Circuit)
~3 NPN transistors
~5 resistors:  3 x 10kOhm, 1 x 3.3kOmh, 1 x 100 Ohm

                   (10KOhm = Brown Black Orange,
                    3.3KOhm = Orange Orange Red,
                    100 Ohm = Brown Black Brown)
~47uf capacitor
                    (You can use and capacitance you choose, but 47uf seems to work the best)
~various small wires
                    (single-core/solid-core wires are the best)

===With all of these components, you are ready to build!===

Step 2:

Picture of

Here Is the Schematic of the Christmas LED Flasher! From here you can use this schematic to build the easy and fun Christmas LED flasher!

Step 3: Done!

Picture of Done!

                                                          ===You're Done!===

          Now you have your working Christmas LED flasher for the holidays to show off to your friends and family! Thanks for reading my instructable! Leave a Comment!

===Be sure to check out my other Instructables and subscribe if you liked this tutorial!===


diane.simbahan (author)2014-10-15

hi. i was just thinking if your schematic diagram matched the picture above? thank you :D

jensenr30 (author)diane.simbahan2014-10-16

It should be.

jensenr30 (author)2010-12-26

Awesome! I was trying to design something that most everyone can make out of simple and common supplies.

Thanks for the comment!

Sohaib Asif (author)jensenr302011-12-20

what transistor value you us in in your video?????????????????

MROHM (author)Sohaib Asif2011-12-20

It's NOT My Video,,,Sorry!!!

kriztopberde (author)2011-12-09

what are the value of 3 NPN TRANSISTORS sir rtty21

jensenr30 (author)kriztopberde2011-12-12

I don't know. you can use most any npn transistor, though.

lukeD (author)2011-06-23

is there an equivalent for the 555 timer ic???

jensenr30 (author)lukeD2011-06-25

not really. In order to build this circuit, you need to have a 555 timer. try looking at for electronics parts. That is where I buy the vast majority of mine. here is one I bought on mouser:

lukeD (author)jensenr302011-06-25

that site is a bit expensive... to ship it to Holland, it is 20 euros. that is a bit too much for a 555 timer wich costs 34 cents. I'll look for something less expensive.

thanks for your help


jensenr30 (author)lukeD2011-06-25

Ouch. That's too bad.

If you want to make an oscillator and skip the 555 altogether, search "transistor oscillator" on google and see what you find.

lukeD (author)jensenr302011-06-26

if you make this circuit:

and change the speaker with a LED, will it flash?

jensenr30 (author)lukeD2011-06-26

I believe it would.

keep in mind that the "2N2907" is a PNP transistor while the "2N2222" is a NPN transistor.

If you have any trouble flashing an LED with this circuit, just give me a PM (private message) and I'll be happy to see what you're up to.


lukeD (author)jensenr302011-06-27

last week I bought a breadboard, if I have it, i'll start experimenting.

thanks for your help


jensenr30 (author)lukeD2011-06-29

no problem at all!

robot1398 (author)2011-03-11

the positive and negative terminals of the capacitor are not given

robot1398 (author)2011-03-05

did you use LM555 timer or NE555 timer

jensenr30 (author)robot13982011-03-06

I used an NE555, but they all work the same at low frequencies. If you are looking for high frequency 555s, I would recommend the following:
~7555...........(500 KHz Maximum)
~TS555........(2 MHz Maximum)

homeuser5 (author)2011-01-10

Yes it was a great video and good work. Please keep those dirt cheap electronic gadgets coming. I enjoy helping my child build the exciting fun projects you have.

coleyy (author)2010-12-26

can i use a 9v battery to power this

jensenr30 (author)coleyy2011-01-08


coleyy (author)2010-12-26

do i need a certain something to turn 9v to 5v?

jensenr30 (author)coleyy2010-12-26

yes. try a 7805. you may find it here:

The website that this is on is called
Mouser is really awesome for electronics enthusiasts because it offers great electronics at great prices.

I hope this helped you! =D
If you have any other questions or comments, I'd love to hear them!

About This Instructable




Bio: I'm an 18 year old Electronics enthusiast. I have completed five semesters of schooling at Minnesota State University in Mankato. I'm pursuing a ... More »
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