There are options to adjust the brightness, type of LED, and rate at which the colors cycle. This is useful to test to see if you wired the colors correctly or want to show a color. This code will cycle through 12 colors and white. Just make sure to check the datasheet to verify that there are channels for each color and include the appropriate parts if you are connecting them to a microcontroller. SMD Common Cathode RGB LED on a Sewable PCB Note: While the example code included in the tutorial was written for analog LED strips, this can also work for individual common anode LEDs, common cathode LEDs, and high power RGB LEDs as well! You'll eventually want to solder the LED strip to header pins, a prototyping board, or splice a 4-pin pigtail connector for a secure connection when using it in an installation.īasic Arduino Hookup w/ N Channel MOSFETSīuttons and Potentiometers Added for Additional Functionality For testing purposes, we'll use a breadboard, jumper wires, and alligator clips to connect. For additional functionality, you could add buttons and a potentiometer to control the LEDs. The hookup diagram for a basic connection is shown on the left. Each color channel requires a transistor to switch. Therefore, we'll be adding the load on the high side. N-channel mosfets usually can handle more power and they are more power efficient. Typically for common anode RGB LED strips, you could use NPN BJTs or N-channel MOSFETs as a switch. You could also try to use software PWM on a Pi. If you are using a single board computer, you would probably need a dedicated PWM chip or DAC to control all three channels of the RGB LED strip. Heads up! Single board computers like the Raspberry Pi are limited in the number of PWM pins.
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