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Tutorial Arduino RevBurner driving a tachometer.

Discussion in 'DIY peripherals' started by jamesdio, Oct 11, 2014.

  1. cazsan

    cazsan Member

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    Hello there!

    I tried to replicate this and I'm facing weird issue I can't solve.
    If someone have any idea I'd really pleased.

    Here are the links to the parts I use:
    The tacho itself boots. I'm able to play with it using external buttons and such. That a good first step.
    I figured out that my power source voltage is correct (12V) but the others are wrong (7.4 instead of 2.5 to 3.0V)...

    I wired the Boost gauge too (based on youtube video from amstudio) and I'm getting also a weird buzzer sound, which makes it barely untestable.

    I uploaded a video on youtube showing what's happening for my rig : here.

    I also ordered a standard diode but It's slow shipping so I'm still testing with current zener diodes I have.
    If you might have some time to look at the following video. Thanks in advance.
  2. abs

    abs Active Member Gold Contributor

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    Hello, there is 2 type of tip120 Darlington (NPN and PNP). I am not sure what is the difference and you used . could you help?
    thanks