how to use Hall Effect

Discussion in 'General Electronics Chat' started by mikelynch, Jan 9, 2011.

  1. mikelynch

    Thread Starter Member

    Jun 30, 2007
    23
    0
    hi,
    I want to use hall effect on bike wheel but not sure how to use it. Is a 10k resistor between 5+ and output all that is needed ? (pins 1 and 3)

    will it toggle to ground/zero while connected to 5+ ?

    this blurb was on the site which has the sensor:
    Posted by Marcwolf on 15th Jun 2010

    Bit of an application note for the unwary

    Looking from the front where the writing is
    Pins run from left to right 1,2,3

    Pin 1 is +5v (or +3.3v)
    Pin 2 is Gnd
    Pin 3 is Output

    Put a 10K resistor between pins 1 & 3. The output will then toggle between High and Low with the magnet. Upi can feed that directly onto a digital pin of a PicAxe or Arduino }}


    http://www.sparkfun.com/datasheets/Components/General/Hall-US1881EUA.pdf[​IMG]
     
    Last edited: Jan 9, 2011
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
    That would be the one I'd use first.
     
    Last edited: Jan 9, 2011
  3. mikelynch

    Thread Starter Member

    Jun 30, 2007
    23
    0
    do you mean a resistor between Vdd and Grnd ? what value for a 5 volt circuit and a 10k bnetween vdd and output.

    thanks.
     
  4. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
    I see two resistors. What are you looking at that has just one resistor?
     
  5. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
    According to the data sheet for 5 volts it was 3.6 mA min.? I think. <snip> now that I've closed the pdf and blinked a few times, I can't remember.

    :)

    Use the value in data sheet, a calculator and the formula.
     
    Last edited by a moderator: Jan 9, 2011
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