How to powe up a device using serial communication?
i am connecting a barcode reader to a pic so how i can power up the device?
the pinout of the rs232 port doesn't contain a Vcc pin so does the serial devices take the Vcc from the TX Pin?
Thank you
the pinout of the rs232 port doesn't contain a Vcc pin so does the serial devices take the Vcc from the TX Pin?
Thank you
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