Quality Electronics Hardware
Optocape is a simple Machine Interface cape for BeagleBone Black.
Originally it was designed for a miniature CNC Mill project based on many 3D Printer projects. While the 3D printer capes provided enough signals, the larger motors required isolated power supplies. Optocape was designed for a four axis machine, and also provides hardware for a touchscreen display.
Nothing about the cape is CNC specific. It can be used in many applications requiring isolated I/O and a big touchscreen.
The signal outputs are divided into five sections. Each section is powered through seperate V and GND nets, allowing the BeagleBone and each section to opperate from seperate power supplies.
In addition to the signal outputs there are four on-board opto relays, rated up to 500mA.
Pin 9.25 is connected to an on-board indicator LED.
Pins 9.11 and 9.13 are connectord to dedicated Tx/Rx optos for serial communication (BBB UART4).
The inputs are also isolated, and resistors are on-board. Attach 3-6 volt input signals directly to Optocape, or add a resistor for higher voltages.
The cape includes a LVDS serializer compatible with many flatscreen LCD panels. The cable is not included, and varies depending on your LCD. The mating connector is a 2MM header (14 pin, 2 rows).
Four-wire touchscreen is supported through pins A0-A3 of the BeagleBone Black.
The LVDS & analog pins are at CMOS level, powered by BBB VSYS, and are therefore ESD sensitive. Use caution if the LCD backlight uses a high voltage flourescent. LED backlights are preferred, and can be switch on/off by the on-board relays.
High quality components are selected for Optocape. Each unit is handmade in USA.
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