Large Photo resistor

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  1. - 11th December 2010, 12:22 #1
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    koossa
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    Default Large Photo resistor

    Good day

    I need something like a large photo resistor (the size of a credit card)
    Is there something else that I can use that can detect light, or can I connect a couple of standard photo resistors together?
  2. - 11th December 2010, 14:30 #2
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    Hi,

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  3. - 11th December 2010, 19:06 #3
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    Koossa,

    Yes, you can connect a couple of photoresistors together. However, since most photoresistors decrease in resistance as the light intensity increases it would be better if you connect them in parallel so any changes will be easier to detect.

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    Last edited by rsocor01; - 11th December 2010 at 19:09.
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  4. - 11th December 2010, 23:29 #4
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    hi koossa,
    Just curious, why so large? Photo voltaic cells "detect" light and generate voltage and they are large. LEDs can detect light too . . . How much sensitivity do you need ?
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  5. - 12th December 2010, 06:30 #5
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    Thank you very much for all the replies!!

    It's for a long distance shooting game.
    On the gun is a laser and on the target is a photo resistor.

    Wouldn't it work if I use something like a fresnel lens on the target?
  6. - 12th December 2010, 07:43 #6
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