This article outlines traditional half-duplex RS-485 configurations and then presents new alternatives for simplifying the control interface by eliminating the required control lines and software control code.
May 29, 2018 by Bonnie Baker, Maxim Integrated
In this project, you'll learn how to wire an LED and flash it using the Raspberry Pi. Also, to isolate the Raspberry Pi's + 3.3VDC compliant output pins from supply voltages greater than this power source, an opto-isolator will be introduced as well.
December 11, 2015 by Don Wilcher