P2:49 = Vcc = +5V
P2:50 = GND
This is the circuit you see above:
RS232 <-> MIDI Conv.
This switch enables you to quickly and easily switch between MIDI and RS232 connections! Very handy for developers!
MIDI/RS-232 Switch external view
This is a special version of the MAX232 which doesn't require many external capacitors, but it's expensive.
What it looks like mounted inside a nice metal case:
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