Difference between revisions of "20ma current loop to RS-232 conversion"
(Add my terminal strip colors) |
(Added detail of tty - RS232 board and terminal strips.) |
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==My ASR hookup== | ==My ASR hookup== | ||
| + | I built the circuit described above from the altairclone site. I found the Teletype 101 article helpful for identifying the proper terminal strip locations. The interface works. I set baud to 110, with 7 bits and 'mark' parity in TeraTerm on a windows 8 notebook with a Gigaware USB<> serial convereter. | ||
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<source lang="text"> | <source lang="text"> | ||
Signal screw terminal my wire color | Signal screw terminal my wire color | ||
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Received data return (-) 3 black | Received data return (-) 3 black | ||
</source> | </source> | ||
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| + | [[File:My Altairclone TTY-RS232 Interface.png|600px]] | ||
| + | [[File:Teletype Model 33 ASR terminal block.png|600px]] | ||
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[[Category:Various]] | [[Category:Various]] | ||
[[Category:Teletype]] | [[Category:Teletype]] | ||
Revision as of 00:09, 21 August 2015
Contents
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.
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
My ASR hookup
I built the circuit described above from the altairclone site. I found the Teletype 101 article helpful for identifying the proper terminal strip locations. The interface works. I set baud to 110, with 7 bits and 'mark' parity in TeraTerm on a windows 8 notebook with a Gigaware USB<> serial convereter.
Signal screw terminal my wire color
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Transmitted data send (+) 7 orange
Transmitted data return (-) 6 brown
Received data send (+) 4 red
Received data return (-) 3 black
