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How to Make Christmas LED & Bulb Blinking Light String Circuit at Home

LED String / Strip Circuit Diagram Using PCR-406

It is a very interesting circuit of blinking/dancing and flashing LED String / Strip. Any one can make it at home as it is very simple and the basic components can be found at any electronic components shop. This LED strip/string circuit (dancing/blinking LED circuit) is an interesting circuit where LED bulbs light and glow in different ways like “Dance” and “Blinks” and most suitable for X-MAS, birthday, anniversary parties, holidays and other related light decoration at home.How to Make Christmas LED & Bulb Blinking Light String Circuit at Home

This LED flashing circuit blinks and glow in the following series.

  • Combination
  • In Waves
  • Sequential
  • Slo-Glo
  • Chasing/Flash
  • Slow/Fade
  • Twinkle/Flash
  • Steady On.

Related Project: Traffic Light Control Electronic Project using IC 4017 & 555 Timer

Below is the step by step tutorial to make the led blinking and dancing LED strip circuit.

Inside the box, the basic circuit on general purpose PCB. (Back Side of the PCB)LED String / Strip Circuit Diagram Using PCR-406

This is the front side of the LED circuit (Front view without box).

How to Make Christmas LED String & Bulb Strip Light Circuit at Home

Now turn around to see the basic and very simple circuit of these funny LED string. It can be seen that the circuit is DIY (do it yourself) related stuff and anyone knowing the basic functions of electronic components can make at home.

Basic X-MAS LED Flashing String Array Circuit

Click image to enlarge

Basic X-MAS LED Flashing String Array Circuit

Components Required for Christmas LED String Circuit

  • SCR 1 and SCR 2 = PCR 406 PNPN
  • D1 = IN 4007
  • C = 10μF, 16 V
  • R1 = 2MΩ
  • R2 = 150kΩ
  • LED = 60 Nos
  • IC/Chip (Programmable) = Y803A
  • Tactile Switch = Pattern Change
  • Input Voltage
  • 220V, 50-60 Hz

Related Project: PCB Design of LED Flasher Circuit. Step by Step

when you complete the circuit on general purpose PCB or breadboard, then connect 60 Nos of LED (white or whatever color you want). Now supply the 230V AC (UK) or 120V AC (US) and the LED string will start to glow and flash. You may also control the way of blinking by pressing the control button on the circuit box.

Below are the different colors and shapes of LED’s and light with incandescent and LED’s tested with the circuit.

Click images to enlarge

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  1. NAGA YADAV says:

    where is the program for chip….?

    1. Electrical Technology says:

      It isn't a programmable IC….i.e. its already programmed

  2. Anonymous says:

    where did u get that IC from cant find it

    1. Electrical Technology says:

      you can find it easily In Electronics Components Store…

  3. Anonymous says:

    What is Y803A ? Working of Y803A?

    1. Electrical Technology says:

      It is already programed Chip.

  4. Anonymous says:

    I think Mr. Wasim dont want to answer my question regarding procurement of Y803A IC. Thank you .

    1. Electrical Technology says:

      Dear…I don't live in India… So i cant help you to find that IC/Chip in your city…Please contact any Electronics Store manager. he will guide you. Thanks

    2. Jēkabs Reinis Pērkons says:

      Which country do you live? I can't find this chip even at any internet store!!! :-(

      1. severino edson amancio says:

        é só você comprar um pisca pisca de arvore de natal , e retira o controle das lampadas .

    3. Electrical Technology says:

      Dear…One of my friend (Importer) import it from chine (4 me)… you can find them on Google or Submit your E-mail….I will send the list of all companies which provide any kind of information for dealing.

    4. emerging technologies says:

      please send details where i can buy it?

  5. bibershally says:

    The electricity usage is important and the development of LED helps humans to save electricity as the research found that more than 30% energy is saved by those houses who using the Low Voltage Led Lighting From such circuit diagram alone also make the damage led in proper way without spending or purchasing the new one, while reading I

  6. The circuit as published is dangerous as it is missing the load resistors (these are not in the control box but fitted to the first LED in the strings). These should be 5K, one in each string, to limit current to 20 ma. Also, the ones fitted at manufacture are 1/8 watt and are totally inadequate. You can get away with 1 watt, but ideally fit 5 watt resistors. You can replace the custom IC with a

  7. Jayanath Ranasinghe says:

    can increase another channels i mean up to 300 leds?

    1. Electrical Technology says:

      wait to update the circuit…

  8. Anonymous says:

    how can i convert it into 12v power supply??<br />thanx in advance…

  9. Anonymous says:

    drive it to 12v??is it possible?how?

  10. Wonderful post! We are linking to this great post on our site.
    Keep up the great writing.

  11. Thanks very nice bloɡ!

  12. pammu saini says:

    hey guys !!
    u can buy it anywhere.. it is available everywhere
    it is a chinease product
    in india i buy it for just 20 rupees
    u can find its price in between 20 – 50 indian rupees
    or in just $ 0.33 – 0.82 dollars

    1. Hi Pammu

      Where exactly I get this (Y803A)Chip.?…
      Pls provide me their contact details and location.

      1. Ajit Srivastava says:

        Please provide me their contact number 9839570652 and Kanpur

    2. I am from India. How can i get this IC. Plz help.

  13. Can’t find the chip and 2 mistakes on shematic

  14. This iss very fascinating, You’re an excessively professional blogger.
    I have joned your feed and look forwaed to looking for exgra of your magnificent post.

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  15. Pretty! Thhis was a really wonderful post. Thank you for supplying this information.

  16. Having read this I believed it was rather enlightening.

    I appreciate you spending some time and effort to put this short article
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    But so what, it was still worthwhile!

  17. L.D.Desai says:

    Good IC.but any importer for INDIA?

  18. PCR406 What else can be replaced

  19. Can i used similar componen? And what it is?

  20. Hy, i have next situation: from 4 SCRs i gues all its broken, i put a diode to close circuit and i check the 4th line of lights. I have about 195Vdc to terminals. After that just one lighting. Who knows what is the voltage to collector of PCR406J, in may case i have 198Vdc, but is alright that???
    And way if i try to connect a line to 220Vdc some bulbs from 2lines lighting to low….is possible to been short circuit with other line???

  21. Hi, I need modification of cheap Christmas garland lights for my diorama

    it is going to be battery operated (2x CR2032 6v in series or even 1 battery if possible 3v) an I will use only four 3mm led, i need ic yt803a for different programs (it has 8 modes)

    This schematic of circuit is originally 220v ac powered. Which modification of circuit do I need for it to be operational for my diorama (probably modification of resistors and diode); I need minimum number of parts because the circuit is battery operated.

    Enclosed images show versions with 2 and 3 transistors but circuit is the same.

    Thank you in advance!

  22. Mr. Milind Modak says:

    I’m interested in “led string/strip circuit, Using pcr-406 & y803a-ic”.Please inform me where do I get ic & scrs.
    Locally it is not available. So please inform me contact details of either company (may be from China or Taiwan) or dealer in Mumbai.
    Thank you & have a nice day.

    1. Hi
      Have you got y803a

  23. Halo, how to remove the light combination to make just steady on. coz i dont need blink-blink effects.

  24. I would like to buy y803 ic. If you know any importer in INDIA please let me know. My mail id is binurajmr1989@gmail.com
    . It’s urgent

  25. Hy, i have this board in my led string.

    Can you tell me how to modify it to just letting the String powered on all the time? Thanks!

  26. Hi, can this be powered by batteries(DC).? i bought this device, and i am planning to install this in a small box wiith battery power. is it possible ..?

  27. Rony youness says:

    Hello, i need a quick help, i have decoration but the light is weak.the curcuit is the as as this picture.can you help me where is the problem?

  28. Kishor Gatkal says:

    Are you making Christmas LED & Bulb Blinking Light String Circuit

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