We want to control the intensity or each of the three colors up and down as well as all colors in tandem. That means we need eight control channels.
The IR transmitter was built from a kit (Velleman Kits, Belgium). Four rocker switches are used for the eight channels. The remote control actually can control up to 15 channels, using the green button as a “shift” key. This feature is not used and pressing the shift key accidentally does not cause any malfunction.
The four rocker switches are labeled ‘1’ through 8. Their functions are shown below.