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Simple RGB LED Controller Circuit

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In this post we learn how to make a simple RGB (Red, Green, Blue) LED controller circuit which may be designated to flash a group of RGB LEDs with a particular sequencing pattern. The idea was requested by Mr. Navdeep.

Technical Specifications

i want to make a display board with red, green and blue leds. Approximately 350 each. and i want to use 12 volts rgb controller. please suggest how should i connect LEDs.

I want to light red, green and blue leds separately and then in combinations. And how to make circuit. please also suggest which rgb controller should be used and how it should be connected.

can u suggest a simple circuit for 12 volt 3 amp each, red green blue, rgb controller. with primary colours only.



This is the photo of circuit i got from internet. but am not able to understand how to make it help please. please suggest a simple circuit using easily available components. for RGB controller.

The sequence pattern will be: red first, then green, then blue, then red green together. or any order and any combination will do. i just need it for making a led display board. only wish is that leds should light in sequence and combinations.

The Design

AS per the suggested sequence format, a simple design using a 4017 IC and a 4060 IC can be used for implementing the proposed RGB LED controller circuit.

Referring to the shown diagram, the 4017 IC and the 4060 IC are wired in a standard LED chaser mode, which is also quite popular with the name "Knight Rider" due to its specific running and chasing light effects.

The IC 4060 supplies the clock pulses to the IC 4017 for executing the intended the sequencing of its output pins in response to every clock pulse at its pin14.

However here the output of the 4017 IC is configured a bit differently for implementing a unique RGB flashing pattern.

Here, the red, green blue strings are wired in a special way to achieve the mentioned desired sequencing pattern, that is when switched ON the R, G. B strings first light up in sequence (in a "chasing" like pattern), next all the three strings get illuminated together and shut off, following this next up the three strings light up one after the other without shutting off in the process, and finally the three LED light up together but flash rapidly to finish the sequence.

The cycle then resets and goes back to the initial phase as described in the above explanation.

THe 1M pot may be adjusted for getting the desired control and sequencing rate on the RGB LEDs.

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About the Author

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials. If you have any circuit related query, you may interact through comments, I'll be most happy to help!



39 thoughts on “Simple RGB LED Controller Circuit”

  1. Howdy, Friend! Interested to Learn Circuit Designing? Let's Start Discussing below!

    • 5 leds is an odd figure, use 6 instead, make strings of 3 in series, and connect two such strings in parallel with each transistor. replace 1K with 330 ohms and use this on each string:

  6. Hello Sir !!!
    i want to use above circuit with 9v battery .will i need 6 ohm 1 watt resistances then ?
    i will be using 1 watt leds,TIP122

  10. hellow swagatam

    is it 100% working as per rgb controller circuit request by navdeep

    because of when i start power supply that time only one led glow and after surtain interval i assume second led glow but its cant

    and circuit cross checked with circuit diagram

    any idea

    • hello samaj, is your IC4060 providing the required clock pulses to pin14 of the 4017 IC?

      confirm this by connecting an LED across pin14 of 4017 and ground, with a 1K resistor in series….this LED should flash at an approximately 1Hz rate….

      if this happens only then the RGB would respond as per the proposed specs.

    • Hello Sandeep, yes you can do it, use TIP 122 for the transistors, and connect 3 LEDs in series across the relevant collectors of the transistors…make sure the each LED string has a 6 ohm 1 watt resistor in series.

    • Hello Basit, the LED effect shown in your video clip won't be possible with a simple circuit, it will require a microcontroller based circuit…it looks very complicated so won't be possible at my level…still I'll try to figure it out…

    • I have no idea about the "data" input to be fed to a RGB pixel string, i'll investigate, if it's just ordinary clock sequence then probably I'll try to produce a suitable circuit for you.

  26. Hello sir I have pixel led of
    Model No:RGB 12mmToo-ICA
    Color – full color
    Size – 12mm
    Power – 0.3watt
    And it contain 50 leds string
    So can I use above circuit for this leds

    • Hi Basit, 50 LED series cannot be used in the above shown circuit transistors, because 50 LEDs in series would require 50 x 3.3 = 165volts…that's too high for any standard general purpose transistor

  34. Dear Swagatam,
    RGB controller shown above in photo also has all above functions. Components used in that controller are one zener to supply 5 volt contant supply to controller chip, one 10,000 ohm resistor, one 1A rectifier diode, onen socket for the chip, one SIL (Single In Line) resistor array. This component has eight pins and has four serparate 1000 ohm resistors in it, one decoupling capacitor, two control buttons, three MOSFET transistors, one chip PIC12F629 microcontroller.
    This information i could get from internet. but circuit diagram is not given and plate has to ordered from outside india.

  36. Dear swagatam,
    i wanted a circuit that could do following functions.
    Product Description:
    Supply voltage:12V
    Output:Three CMOS drain- open output
    Output current:<4A(each channel)
    Output power:<144W
    Connecting Mode:Common anode
    https://drive.google.com/file/d/0B1yh2zqFOUHZR0RjanpFZTJqT00/view?usp=sharing
    https://drive.google.com/file/d/0B1yh2zqFOUHZdG8xUV9LRmROV0E/view?usp=sharing
    https://drive.google.com/file/d/0B1yh2zqFOUHZYXd2OXlqVzZoa00/view?usp=sharing
    Dear Swagatam, i dont need a separate remote. buttons can be placed on same plate circuit. This circuit will be useful for making LED boards that u must have seen outside hotels and hospitals with red, green and blue leds. In this circuit we can choose which colours we want.
    thank u for your kind support.

  40. Dear Swagatam,
    thanks for your quick response. i have few queries. If i connect 12 volt 12 ampere supply to input, can i put a load of 3 – 4 ampere on each red, green and blue string.

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