Reed Switch for Sensor

Discussion in 'The Projects Forum' started by cokeeffe, Mar 8, 2010.

  1. cokeeffe

    Thread Starter New Member

    Mar 8, 2010
    1
    0
    Hi,

    I'm looking at making a sensor that will sound a buzzer and turn on an LED for a second or 2. I'm going to use a Reed switch but my question is, because the magnet will only get close to the reed switch for a split second, will the LED and Buzzer only sound for that split second or will the reed take a second to retract allowing for the buzzer and light to stay on for that second?

    thanks
     
  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,172
    397
    Reed reaction time in milli sec. Use old faithfull 555 as one-shot.
     
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