These were medium power alphanumeric display boards that used RS485 (implementing the DMX frame structure) as well as wireless RF modules in order to control the large custom built displays. Each board was responsible for controlling a single "digit" and could be controlled through the chain. In order to bridge gaps too large for physical cables the modules had a header for low cost RF modules that allowed the chain to be bridged using two wirelessly linked boards.
A novel method of programming individual device addresses was devised where the removal of a configuration jumper allowed the user to scroll through each address value. Because each Fet channel had a small status led on the board these leds were used to display the binary value of the current address.
This novel approach meant that no dip switches needed to be added to the PCB.
