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Calculators in the workshop

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Calculators in the workshop

Home › Forums › Model Engineers’ Workshop. › Calculators in the workshop

Viewing 6 posts - 1 through 6 (of 6 total)
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  • 1 July 2012 at 13:38 #38136
    Deric
    Participant
      @deric

      Using calculator to count up and down?

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      1 July 2012 at 13:38 #93481
      Deric
      Participant
        @deric

        Hi, all,

        Can anyone else remember an article either in ME or MEW about modifying a cheap calculator to count up and down the revolutions of a handwheel by connecting it to a reed switch?

        I've been through all the back copies and I can't find it but I know I've read it somewhere!

        Anybody help?

        Best regards

        Deric

        1 July 2012 at 14:58 #93487
        dcosta
        Participant
          @dcosta

          Hello Deric,

          Using MEW_Indexes **LINK** i found the following:

          Subject: Lathe
          Title: Cheap and simple turns counter
          Author: Fletcher
          Issue: 114
          Page: 46
          Year: 2006
          Montyh: April
          —————————————————–
          Subject: Quick tip
          Title: Counting handwheel turns
          Author: Rhodes
          Issue 83
          Page: 22
          Year: 2000
          Montyh: July

          Hope this helps.

          Best regards
          Dias Costa

          1 July 2012 at 15:00 #93488
          Ian S C
          Participant
            @iansc

            I'v got one some where that I used as a counter for coil winding, just a couple of wires, one attached to the winder, the other so it touches once per rev.Can't remember how I wired it up, and I think you have to push 1 then +. Ian S C

            1 July 2012 at 15:05 #93490
            John Shepherd
            Participant
              @johnshepherd38883

              Deric

              To use a calculator to count you can connect a reed swich across the '=' button. Press +1 and then each time the reed switch operates the calculator will count up by one. If you then enter -1 it will count down.

              John

              3 July 2012 at 11:28 #93601
              Deric
              Participant
                @deric

                Thank you all for your replies.

                I knew I could rely on you for an answer. I'm off to the £ shop now for a cheap calculator.

                Thanks again

                Deric

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