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bogantech
on Nov 5, 2022
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The RS-232 protocol [video]
I'd be surprised if any modern board didn't use something like a MAX232 or something similar though
tyingq
on Nov 5, 2022
[–]
The context being that a MAX232 only needs +5vcc, right?
Edit: Apparently called 'Integrated charge pumps'
bloggie
on Nov 5, 2022
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Yes, there are low current requirements, so typical uart to rs232 transceiver ICs include the electronics necessary to provide the higher voltage +- supplies.
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