Supported LED IC Protocol Families
The implementation of these chips can vary depending on the type of fixture. LED tapes and single pixel PCBs often utilise built in driver chips within the LED package, these are often 5V. Other types, usually higher powered 12V and 24V fixtures use outboard driver chips which control a cluster of conventional LEDs which form a pixel.
Pixel control outputs
The Duo has two independent LED pixel control outputs which can be connected to two separate fixtures or two separate chains of fixtures. Each LED pixel control output can control up to 3600 pixel control channels at 27.8FPS (frames per second), this equates to 1200 RGB pixels per output as each pixel requires 3 channels of control. It is possible to mix and match pixel types within a chain as long as the total control channel count does not exceed 3600.
The table below gives some examples of pixel types and their required control channels to calculate the total pixel control requirement for a set of Pixel fixtures.
|Type||Pixel Colours||Channels Required||Max Pixels per Output|
|RGB||Red, Green, Blue||3||1200|
|RGBW||Red, Green, Blue, White||4||900|
|RGBWW||Red, Green, Blue, White, White||6||720|
|RGBWWA||Red, Green, Blue, White, White, Amber||6||600|
The maximum framerate at which the pixels are refreshed is proportional to the number of pixel control channels being driven from the pixel control output.
For example if only 3 control channels are being used for a single RGB pixel connected to the output then the frame rate will be greater than 500FPS (frames per second).
If the control output has the maximum number of pixels assigned and all 2400 control channels are being used then the maximum frame rate achievable is 27.8FPS.
Please note that the Duo controller outputs are configured to control 600 3-channel pixels with a framerate of 50FPS by default. If your installation uses more pixels, do not forget adjusting the output settings in the Duo’s WebApp before testing.