Light and water sensors

Discussion in 'General Electronics Chat' started by mik3, Jun 8, 2010.

  1. mik3

    Thread Starter Senior Member

    Feb 4, 2008
    4,846
    63
    Hi guys,

    Do you know of any of the shelf light sensors and water sensors. I will use them to track the sun and detect rain respectively.

    What is the best method for sun tracking?

    Thanks.
     
  2. Bychon

    Member

    Mar 12, 2010
    469
    41
    Cadmium Sulphide light dependent resistors exist, as do solar cells. Many people have designed solar trackers for use with solar cells. Some are probably available at the retail level (off the shelf).

    As for rain, detecting water seems so simple that I'm afraid of insulting you by telling you to use electricity.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    We did rain detection on an orchard with a pair of hair clips spaced a cm apart on a leaf. The clips were a series circuit with a resistor. Conduction (lower voltage across the clips) meant rain.
     
Loading...