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Connect a photoresistor to 3.5mm mono (TS) jack plug

Discussion in 'General Electronics Discussion' started by billie123, Apr 10, 2012.

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  1. billie123

    billie123

    2
    0
    Apr 10, 2012
    Hi,

    I'm a complete rookie at electronics and am in need of some help/direction for a project.

    I need to somehow connect a photocell to a 3.5mm mono headphone jack, so that fluctuations in light can be transferred to Hz frequency.

    Im not sure of what components I will need in between,or how to connect them. Can you help?
    Thanks.:D
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,298
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    Jan 21, 2010
    Yes, but tell us what you want to do.

    And what type of "photocell" you have. (LDR, photovoltaic, photodiode, phototransistor, etc). Some would need external power, others have a lower output, etc...
     
  3. billie123

    billie123

    2
    0
    Apr 10, 2012
    I'm connecting the jack to a computer program so that the resistance, converted to Hz, will trigger reactions specified in a frequency range.

    I have phototransistors. Are these ideal for my needs?
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,298
    2,736
    Jan 21, 2010
    You will need an external voltage. The change in resistance of the phototransistor will not generate a signal.

    This might help.
     
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