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Simple RS-232 keypad?

Discussion in 'Electronic Components' started by plh, Sep 11, 2003.

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  1. plh

    plh Guest

    I have been looking for simple low cost Keypads w/RS-232 output. What are some
    good manufacturers? Looking on the Web I keep ending up at Amazon or Ebay, but I
    want to call up (someone who knows the product) before buying. I need to have at
    least 3 keys but more, say digits 0-9, would not hurt. Needs to have 9 pin
    serial output. (Or 24 but pref. 9. Or I could use an adapter it it came with a
    USB connector.)
    Use is for part of a Statistical Process Control system that is already set up
    w/RS-232. Presently this is set up for digital measuring instruments using the
    smart switch 232BBS4 from B&B Electronics (they don't have anything like I
    describe above, I asked.). In any case not all measurements are suited for
    micrometers or calipers, in some cases gage pins are used. The keypad would be a
    convenient way to capture the results. Machine operators would press one key for
    a good component, another for undersize, and another for oversize.
    I would greatly appreciate any leads.

    Thank You,
    Paul Hossfield
    Mahr/Federal Products Co.
    1144 Eddy St.
    Providence, RI 02940
    Phone: 401-784-3270
    Fax: 401-784-3461

    I keep hitting "Esc", but I'm still here!
  2. Guest

    I would just use a low end pic, an inline resistor pack of say 10k
    across a port, and say up to 16 switches arranged as a matrix across
    the port.
    With a little code thrown in for key scan and rs232 etc. I made one of
    these things for a friends' project a couple of years ago, if you get
    stuck, and when I get home again, I will send you a hex file and
    details on how to manufacture it.

  3. Actually we are working on a RS-232 conversion interface for a
    standard IBM compatible keyboard for use with the Fluke 9100A, and I
    think it might work for you too. 1200b 8n1. One of the fellows on
    techtools mail list actually....

    John :-#)#

    (Please post followups or tech enquires to the newsgroup)
    John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
    Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
    "Old pinballers never die, they just flip out."
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