20ma current loop to RS-232 conversion

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Revision as of 20:29, 15 August 2015 by Jeffa (talk | contribs) (adding more resources. Schematic at circuitlab)
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20ma current loop <> RS-232 conversion

Vintage PCB

Dig this crazy circuit board man! Still in it's original packaging from Hobby World Electronics in Northridge California.

TTY RS-232 Front.png TTY RS-232 Back.png

other resources

  • Another circuit. From [Altairclone] Specifically designed to fit in a Teletype model 33 using only a 12vdc wall wart for power.
  • Another circuit I found referenced on the greenkeys email list
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