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climbing indicator circuit

Discussion in 'General Electronics Discussion' started by FutureFuzz 26, Oct 14, 2015.

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  1. FutureFuzz 26

    FutureFuzz 26

    Nov 15, 2012
    I've been a member for a while, but haven't been around since highschool.

    I have an idea for my bike tachometer (2009 Kawasaki Zx10r)
    But I'm not really sure how I'll make it work.

    Essentially what I want to do is back light each number (1-15) of the thousand rpm. And when ever the needle points to a number, the LED to illuminate.
    Any ideas how I would go about this?
    I was going to use dual color LEDs so when the shift light triggers the lights will change to red. But most important is to make the numbers essentially climb the tach in sync with the needle
  2. Tha fios agaibh

    Tha fios agaibh

    Aug 11, 2014
    Perhaps a Lm3914 to drive the leds?

    Sounds like a big hurdle would be, back lighting each number with an led and getting the thing back together.

    You could also try paralleling a small light off the analog leds, but that sounds like microsurgery to me.
    Martaine2005 likes this.
  3. Martaine2005


    May 12, 2015
    Hello FutureFuzz 26,
    I had the original ZXR. Lovely machine..
    I have seen a lot of people 'modding' their tachos with a LM3915 chip. Usually used for a simple VU meter. Or volume sensor kind of circuit.
    Have a search on the net for that kind of thing.

  4. Martaine2005


    May 12, 2015
    Lmao John......
    Tha fios agaibh likes this.
  5. FutureFuzz 26

    FutureFuzz 26

    Nov 15, 2012
    I will look into it. I appreciate the advice
  6. GPG


    Sep 18, 2015
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