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You are here: Home / Replies / LDR is a Light Dependent

LDR is a Light Dependent

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Microcontroller › PIC › how to interface ldr with pic18f › LDR is a Light Dependent

September 4, 2013 at 3:35 pm #10421
Luis Morquecho
Participant

LDR is a Light Dependent Resistor, so its value of Resistance change with the light that the LDR receive.

The more light the less resistance.

You must get a network of resistances for example in serial to convert the variation of resistance in a variation of voltage.

 

+VCC

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Resistance (1K)

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> Analogic input (PIC)

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 LDR

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GROUND

 

As AJISH ALFRED have said before connect it at an Analog Input of the PIC and read the analogic value

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