Human eyes use 3 colour receptors (red, green, and blue).
We can thus fool our eyes into seeing any colour by combining various amounts of red, green, and blue light.
We call this RGB color.
The RainbowBlock is actually 3 LEDs in one.
By adjusting how bright each LED is, you can make:
256 x 256 x 256 = 16,777,216
Over 16 Million Colors!
You can control how bright the LED is using PWM (Pulse Width Modulation),
but PWM only works on Pins 3, 5, 6, 9, 10, or 11
(We have chosen 9, 10 & 11 by default)
PWM is a number out of 255. Here are a few common values:
| % | 0% | 6% | 13% | 20% | 25% | 39% | 50% | 59% | 75% | 100% | % |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PWM | 0 | 16 | 32 | 50 | 64 | 100 | 128 | 150 | 192 | 255 | PWM |
| HEX | |
|---|---|
| R | |
| G | |
| B |
You can use this color picker to pick any color (click the button),
then see if you can make your RainbowBlock the same color!
The sliders only work in full-screen mode.
