Reed Switch - Circuit

Discussion in 'The Projects Forum' started by greg_yia, Apr 8, 2009.

  1. greg_yia

    Thread Starter New Member

    Apr 8, 2009
    Hi All,
    I want to connect a reed switch (Model: ct05) to a Zigbee SoC cc2430 chip.
    Can anyone tell me how i should wire this up ?
    Thank you
  2. greg_yia

    Thread Starter New Member

    Apr 8, 2009
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    No, that is a pushbutton switch, and it will not work as an input to the IC.

    Do you want the switch to be active high or low?

    A reed switch is a pair of metal reeds inside a glass envelope. An applied magnetic field will cause the reeds to come together and conduct. A magnet or a coil carrying a current will work to produce the necessary field. Which method do you wish to use?
  4. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    beenthere, I think the OP was using the pushbutton symbol to simulate the reed switch in the schematic. The switch and resistors will certainly work as an input for an IC. (Or did the OP go back and edit the schematic form their original post??? :confused: )

    I'm assuming that the 1Meg resistor is there to protect the I/O pin, in case it were inadvertently programmed to an Output configuration and driven low while the switched was closed. I would opt for a value more like 10K. But that's just me. ;)