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Serial Programmer — Parallax Forums

Serial Programmer

KorkenKorken Posts: 4
edited 2006-11-28 07:56 in Propeller 1
Hi all!

I found this drawing for a programmer http://forums.parallax.com/forums/default.aspx?f=25&m=123910 and I wonder if someone has tried it?
And does the Propeller have built in saftey diodes if the capacitor goes negative voltage?

//Emil
Sweden

Comments

  • Beau SchwabeBeau Schwabe Posts: 6,568
    edited 2006-11-27 19:09
    What we have found, is that the two transistor version works on some computers and not others. The three transistor version was derived from what
    is currently on-board the BS2 modules and has withstood the test of time on many different computers.

    http://www.parallax.com/propeller/media.asp

    "...And does the Propeller have built in saftey diodes if the capacitor goes negative voltage?..."

    That's a strange question to deal with, why would that circumstance ever happen?
    ·
    There is a reverse biased diode formed through the natural process of silicon design, but certainly not
    adequate to support what your question suggests.· Doing so would destroy the "diode" in a short amount
    of time.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Beau Schwabe

    IC Layout Engineer
    Parallax, Inc.

    Post Edited (Beau Schwabe (Parallax)) : 11/27/2006 7:16:37 PM GMT
  • KorkenKorken Posts: 4
    edited 2006-11-27 19:54
    Okey, so the one on http://www.parallax.com/propeller/media.asp is better?
    Does it work on all computers?

    //Emil
    Sweden
  • Beau SchwabeBeau Schwabe Posts: 6,568
    edited 2006-11-27 21:48
    Korken

    The http://www.parallax.com/propeller/media.asp is more reliable, but I can't make a blanket statement and say that it will work on all computers.
    I can say, that since the "core" communication components are the same as ones that we have used on our BS2 modules, that any known issues
    with the BS2 should also be observed with this serial adapter.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Beau Schwabe

    IC Layout Engineer
    Parallax, Inc.
  • KorkenKorken Posts: 4
    edited 2006-11-27 21:53
    Okey! Thanks!

    //Emil
    Sweden
  • parskoparsko Posts: 501
    edited 2006-11-28 07:56
    Korken,

    As I said in the other post, I have it set up on my homebrew board, and I have been using it for months. One thing I cannot confirm is data transmission back to a terminal program, like Hyperteminal (aka I only send to the Prop, for now). Otherwise, it works great! If you are more interested, I can identify exactly the components I use, for your reference...

    -Parsko
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