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This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

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Rule 4: "PM Sent!" messages (or, how to use the Private Message system)

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Why do we have this policy? Sending a "PM Sent!" type message basically wastes everybody else's time by making them having to scroll past a post in a thread that looks to be updated, when the update is not meaningful. And the person you are sending the PM to will be notified by the forum software that they have a message waiting for them. Look up at the top near the right edge where it says 'Notifications' ... if you have a PM waiting, it will tell you there.

Rule 5: Copyright and other legal issues

We are here to discuss vintage computing, so discussing software, books, and other intellectual property that is on-topic is fine. We don't want people using these forums to discuss or enable copyright violations or other things that are against the law; whether you agree with the law or not is irrelevant. Do not use our resources for something that is legally or morally questionable.

Our discussions here generally fall under "fair use." Telling people how to pirate a software title is an example of something that is not allowable here.


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If you are unsure you may consider sending a private message to a moderator instead.


New user moderation

New users are directly moderated so that we can weed spammers out early. This means that for your first 10 posts you will have some delay before they are seen. We understand this can be disruptive to the flow of conversation and we try to keep up with our new user moderation duties to avoid undue inconvenience. Please do not make duplicate posts, extra posts to bump your post count, or ask the moderators to expedite this process; 10 moderated posts will go by quickly.

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Plug and Play RS-232 Connection for Teletype Model 33

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    Plug and Play RS-232 Connection for Teletype Model 33

    I've developed a small board that provides a plug and play connection between a Teletype Model 33 and an RS-232 serial port. Here's a link to a video that demonstrates the new board. (If you don't want to watch the whole video, start watching at the 4:20 mark in the video.)

    https://youtu.be/PNbo46Yw92M

    The new board plugs directly onto the P2 connector in the rear of the Model 33 Teletype where it picks up the transmit and receive data loops and also picks up power from the 48vac supply provided on the connector. The RS-232 connection is via an RJ-14 modular jack. Modular DB-25 and DB-9 connectors for the other end of the cable are still readily available.

    The board uses SMT components and the 16 pin switching regulator has 0.5mm lead spacing. In addition, the back of the regulator (inaccessible with a soldering iron) is a large ground pad and must be soldered to the board for proper thermal conduction. For these reasons, the board will have to be pre-assembled by an SMT assembly house.

    Pricing will be $40-$70 depending on how many boards I run. If you are seriously interested in buying one of these boards, please contact me at deramp5113 followed by ASCII 0x40 followed by the yahoo domain name so I can get a count started and run the first batch as soon as possible.

    Mike

    #2
    Originally posted by deramp5113 View Post
    I've developed a small board that provides a plug and play connection between a Teletype Model 33 and an RS-232 serial port. Here's a link to a video that demonstrates the new board. (If you don't want to watch the whole video, start watching at the 4:20 mark in the video.)

    https://youtu.be/PNbo46Yw92M

    The new board plugs directly onto the P2 connector in the rear of the Model 33 Teletype where it picks up the transmit and receive data loops and also picks up power from the 48vac supply provided on the connector. The RS-232 connection is via an RJ-14 modular jack. Modular DB-25 and DB-9 connectors for the other end of the cable are still readily available.

    The board uses SMT components and the 16 pin switching regulator has 0.5mm lead spacing. In addition, the back of the regulator (inaccessible with a soldering iron) is a large ground pad and must be soldered to the board for proper thermal conduction. For these reasons, the board will have to be pre-assembled by an SMT assembly house.

    Pricing will be $40-$70 depending on how many boards I run. If you are seriously interested in buying one of these boards, please contact me at deramp5113 followed by ASCII 0x40 followed by the yahoo domain name so I can get a count started and run the first batch as soon as possible.

    Mike
    Hi Mike
    Will it take 5V TTL serial levels?
    Dwight

    Comment


      #3
      Originally posted by Dwight Elvey View Post
      Hi Mike
      Will it take 5V TTL serial levels?
      Dwight
      If you provide TTL levels with 1=low and 0=high it will work.

      Mike

      Comment


        #4
        Hi Mike
        The reason I ask is that now days most had a USB to ftdi converter. There are times when I'd like to connect to my, otherwise, useless laptop. I believe the ftdi uses the same polarity swing for mark and space as RS232.
        The price your asking comes with the molex connector and such?
        Dwight

        Comment


          #5
          Dwight,

          The board will be shipped fully assembled including the Molex connector on the back side of the board and the modular jack on the component side of the board.

          The unit will work fine with a serial to USB adapter connected to a laptop if your adapter's chipset and the Windows driver for it are happy at 110 baud.

          Mike

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