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Thread: Honeywell 200 resurrection

  1. Default

    A Teensy 3 might be fast enough and still provide the ease of the Arduino IDE.

    https://www.pjrc.com/teensy/techspecs.html

  2. #152
    Join Date
    Sep 2012
    Location
    Kent, England
    Posts
    126

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    Quote Originally Posted by ClausB View Post
    A Teensy 3 might be fast enough and still provide the ease of the Arduino IDE.

    https://www.pjrc.com/teensy/techspecs.html
    It looks like the Teensy 3 is intended to operate on 3.3 volt signals and my logic needs the full 5 volts where the Arduino is acting as a current source, not sink, so I'd need to provide some interface buffer amplifiers and also my tests currently need a lot of signal lines between the Arduino and H200. I'm using the Arduino Mega 2560 shown below mounted on an H200 patch panel so that it can be plugged into any spare backplane socket. That panel only has 33 pins available for signals, so if the interface gets any more complicated I may have to add a second panel on a cable to plug into another socket. Only the larger Teensy boards appear to have so many I/O pins as the Mega 2560.

    Arduino.JPG
    Last edited by RobS; March 18th, 2019 at 08:10 AM.
    Rob - http://www.honeypi.org.uk
    The Internet is a winch to get your project off the ground ... but always have a parachute handy.

  3. #153

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    Mmmmm, I can smell the phenolic resin now....

  4. #154
    Join Date
    Sep 2012
    Location
    Kent, England
    Posts
    126

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    Quote Originally Posted by durgadas311 View Post
    Mmmmm, I can smell the phenolic resin now....
    Actually after forty to fifty years the phenol has pretty much dried out, so it's not a problem, even with my crates containing over a thousand boards.
    Rob - http://www.honeypi.org.uk
    The Internet is a winch to get your project off the ground ... but always have a parachute handy.

  5. #155

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    Yeah, but I'm still going to imagine that comforting odor of "home cooking"

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