![]() Make sure shiftclock goes to pin 11, and output latch goes to pin 12. Change R, G and B values in analogWrite () function to 255 - R, 255 - G, and 255 - B, respectively. The following sketch code changes the color of the LED, running through a series of colors. If common anode, then you need +5 on the anode line, and let the shift registers take the cathodes low to light them up - your LEDs are upside down on the schematic. For RGB LED with common Anode, you need to: Connect the common pin to 3.3V of Arduino. Multiple DIY projects and circuit construction. Here is a photograph of the final breadboard arrangement with the Arduino Leo: Applications of Common Cathode RGB Led Breakout: It is used in robotics. ![]() We do the same thing here, except now, instead of a single wire connecting to a single resistor ahead of a single LED, we have three wires connecting to three resistors ahead of three legs of our single RGB LED. With our Hello World Arduino Micro project we already encountered resistors ahead of an LED. The following is a diagram of the breadboard layout for our simple Hello World program. ![]() I used 220 ohm dropping resistor for all the LED segments but of course you can fine tune this and use different values for the individual segments. This way you can see how to drive both of them. ![]() One is a common cathode device and the other is a common anode RGB LED. This is a simple circuit to turn on the LED and cycle through different colors. I’ve wired two RGB LEDs to the Arduino for this demo. For example, to make purple, you'd turn on the red and blue LEDs and turn off the green LED. Like a pixel on a computer screen, you can control the output of all three lights to create different colors. The RGB LED has three different colors of LED inside of it. 5mm Triple Output LED RGB - Common Cathode (5Pcs) Product Code: CL00052LD Availability: In Stock About Makerfabs. ![]()
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