Posted by dapj20 on Feb 05, 2017 in 8051-8052, uC-Timer-Clocks
I've seen on the net the schematics for RS232 with Opto-Isolation. The supply on the PC side is from the PC. The supply from the line side is external? I've seen the 3 connectors (RX, TX & GND) together with 2 connectors 5V. One of them is connected… more »