Using a Teletype Machine as a USB Printer with Arduino -- Episode 549

In a previous Episode Clem has mapped out the pinout for his 1960 Siemens S100 Teletype. Now it is time to decode its communication protocol and interface it with an Arduino to connect it over USB to a modern PC! 75Baud 5-Bit Baudot code is quite different to modern ASCII encoding. There are some bumps in the road like Baudrate calibration and recreating the Serial protocol in Arduino Code! What retro Tech would you like to revive?

Supplemental Content:

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Kit
"CP2102-GMR" USB to Uart converter	Silicon Labs	1	Buy Now
Atmega 328 P	Microship	1	Buy Now
"MAX3232CPE+"	Maxim	1	Buy Now
"RZ03-1C4-D005"	Schrack	1	Buy Now
"USB-B-S-RA"	Multicomp	1	Buy Now
"2301843-2" DB9	TE CONNECTIVITY	1	Buy Now

Additional Parts:

Siemens T100 S (S100) teletype from 1960

Ferrules

Aviation connector 4 Pin

Patience and determination

element14 presents | About Clem | Project Videos

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Top Comments

mayermakes over 2 years ago in reply to aspork42

doable, yes but I'm not good at realtime dataprocessing so I might not have gotten that to work in time.
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aspork42 over 2 years ago

Nice work! You could have also used a non-contact tachometer to measure the speed of the machine. Just put a piece of reflective tape on the shaft and let it spin.
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beacon_dave over 2 years ago in reply to javagoza
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beacon_dave over 2 years ago in reply to javagoza

Looks like the IF-60 adds a data terminal mode for direct use with a modem device.

https://archive.org/details/BrotherIF50/mode/2up
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mayermakes over 2 years ago in reply to DAB

thank you, its always worth overcoming obstacles!
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DAB over 2 years ago

Great job Clem.

Your persistence paid off.
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beacon_dave over 2 years ago in reply to javagoza

Toy ? Haven't you got a telex to get sent off to some guy called Clem with a 1960 Siemens S100 ?

There appears to be an earlier Brother IF-50 interface which looks like it had similar functionality. Not sure of it was just a cosmetic change / different connector, or if there was something radically different about it. Perhaps if you can get a pin-out or schematic for the IF-50 then it may give some clues as to the protocol used for the IF-60.
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javagoza over 2 years ago in reply to javagoza

archive.org/.../brother-if-60
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javagoza over 2 years ago in reply to beacon_dave

Thanks for the info! It will be a fun toy. I'll look up information on that IF-60 interface.
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javagoza over 2 years ago in reply to WilliamF

I disassembled it to take some photos. Luckily after reassembling it still works.
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