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SHEET 3 – Connectors
This sheet shows the connection to other boards in the system and also the fader start inputs.
The CPU board plugs into 2 50 way headers J11-12.
The Control board connects to J16 via a 26 way ribbon cable.
The LCD display connects to J15 (data and power), and J14 (backlight).
It can be seen that the I/O board is used to route signals between the CPU board and the control
board and LCD module.
J6-7 are the fader start inputs, designed to connect to mixers for automation. Each fader start
connector carries 2 control signals. There is no ground connection so the system relies on the audio
also being connected in order to provide a ground.
The 4 fader start signals are sent to the control board microcontroller.
D4-7 and R13-16 provide voltage limiting to protect the micro.
J1-2 are the USB connectors on the rear panel (USB2 and USB3). These are connected to the CPU
board via J9-10.
J13 is a debug connector. It can be connected to a PC to test and debug the system. A level
transceiver is required to convert the 3.3V levels to RS232 levels for the PC.
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