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Re: Numerical output from a single LED

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From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.arch.embedded
Subject Re: Numerical output from a single LED
Date Thu, 26 Dec 2019 15:33:19 -0800
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John Speth <johnspeth@yahoo.com> writes:
> The device is a single purpose hand held grocery labeler and we want
> to count labels dispensed. The counter would not exceed 50,000 labels.

Building on Theo's suggestion, if the idea is just for the operator to
know how close the counter is to 50k:

1) steady green = 0 to 25k labels printed
2) blinking green = 25k to 40k
3) steady orange = 40k to 45k
4) blinking orange = 45k to 49k
5) blinking red = 49k to 50k
6) steady red = 50k, printer cannot operate

Use the receipt printer or a phone app to get the exact number out if
desired.  The printer can print human readable numbers and/or a QR code
that a phone app can scan, allowing easy tracking of the activity of the
different printers.

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Thread

Numerical output from a single LED John Speth <johnspeth@yahoo.com> - 2019-12-26 11:51 -0800
  Re: Numerical output from a single LED Paul Rubin <no.email@nospam.invalid> - 2019-12-26 12:21 -0800
  Re: Numerical output from a single LED Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2019-12-26 16:44 -0500
  Re: Numerical output from a single LED Theo <theom+news@chiark.greenend.org.uk> - 2019-12-26 22:59 +0000
    Re: Numerical output from a single LED upsidedown@downunder.com - 2019-12-27 06:53 +0200
  Re: Numerical output from a single LED Paul Rubin <no.email@nospam.invalid> - 2019-12-26 15:33 -0800
  Re: Numerical output from a single LED Rick C <gnuarm.deletethisbit@gmail.com> - 2019-12-26 23:29 -0800
    Re: Numerical output from a single LED Richard Damon <Richard@Damon-Family.org> - 2019-12-27 10:42 -0500
  Re: Numerical output from a single LED Robert Roland <fake@ddress.no> - 2019-12-27 18:10 +0100
    Re: Numerical output from a single LED Paul Rubin <no.email@nospam.invalid> - 2019-12-27 11:13 -0800
  Re: Numerical output from a single LED Mike Perkins <spam@spam.com> - 2019-12-27 20:20 +0000
  Re: Numerical output from a single LED Paul Rubin <no.email@nospam.invalid> - 2019-12-27 13:55 -0800
    Re: Numerical output from a single LED Rick C <gnuarm.deletethisbit@gmail.com> - 2019-12-27 17:54 -0800
      Re: Numerical output from a single LED Paul Rubin <no.email@nospam.invalid> - 2019-12-28 01:07 -0800
        Re: Numerical output from a single LED Rick C <gnuarm.deletethisbit@gmail.com> - 2019-12-28 08:24 -0800
          Re: Numerical output from a single LED Phil Martel <pomartel@comcast.net> - 2019-12-30 10:16 -0500
  Re: Numerical output from a single LED Clifford Heath <no.spam@please.net> - 2019-12-29 12:32 +1100

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