[mythtv-users] Homebrew Serial Receiver Problems
gull at gull.us
Tue Feb 27 01:23:55 UTC 2007
Jeremy Gillick wrote:
> If the serial port does not provide power, then why do the circuit
> diagrams have a voltage regulator?
There's no officially-designated power pin on the serial port. It's not
uncommon for non-standard serial port devices to use some of the pins
for small amounts of power, though. The driver for the device simply
makes sure those pins are set high.
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