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Wind Vane

Discussion in 'Electronic Design' started by RKovach, Aug 29, 2004.

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  1. RKovach

    RKovach Guest

    I found an article in an old "Electronics Now" mag that shows how to build a
    wind vane. It uses a rotary encoder and a 74HC154 decoder to light the
    correct LED for display. My problem is that they say the sensor will work up
    to 30 feet away. I would need over twice that distance to use this in my
    home. Does anyone know if it is possible to boost the signal for this, or
    some other way to make an electronic display wind vane?
  2. Dave Garnett

    Dave Garnett Guest

    Units like the Davis windvane use a pot that can rotate 360 degrees. They
    give an output voltage proportional to angle, with a fairly small dead
    region (5 - 10 degrees). You could use a very long cable (three cores), and
    at the far end something like a micro with A/D to drive leds, or something
    like that.
  3. John Fields

    John Fields Guest

    I'm assuming that the article calls for a 4 bit rotary encoder, in
    which case the only issues are how to get power to the encoder, how
    much power it uses, and how data gets from the encoder to the HC154.

    Without further information it would be difficult to come up with
    something concrete for you.

    If you could scan the article (or just the schematic would be OK) and
    post it somewhere that would be a huge help.
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