2017-06-06
While waiting for the I/O board PCB to come back from fabrication I started designing the BBB cape that will house the serial drivers, power supply to the I/O board, more LEDs, and etc. This of course is necessary because the BBB’s serial ports operate at TTL level and are not tolerant of “proper” RS232 voltages and its I/O pins must not have voltage applied until the chip boots (the reset line goes high). First Read more…