For the challenge, I wanted to send data from my computer's real serial port (RS232 9-pin connector). For that, I created an adaptor circuit because the voltages on a computer serial port are ...
One of the pins enables serial output when pulsed low. Touching it to V- even turns on an RS232 icon on the display, as seen above. To make this accessible without opening the case a momentary ...
What is a null modem? Using the RS232 protocol, null modems let you connect two computers that do not have modems. The RS232 protocol was developed to connect teletype machines and the modems they ...
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