Photo Diode sensitivity

[Mallesh]

sir here i am using a photodiode of 5mm 

here i want to get 4.5 to 5 volts as output 

and i have designed a circuit of 

+5v to negative of photodiode and other end is given to a 1K resistor and another end to GND

and i want the voltage drop across resistor as ~5 v.

when i inserted a leaser beam on PhotoDiode but I am not geting the output 5V 

i think PhotoDiode has a sensitivity problem plz give me a idea of better Photodiode sensistivity

[AJISH ALFRED]

Hi Mallesh,

Normally you will get voltages around 3 to 4 volts only. Make sure that you are not using IR photodiodes. I’ve never tried with a laser beam but I think there can’t be any difference between sensing normal light and laser.

Please post your circuit diagram with the part number of the photodiode you are using.

[santhosh kumar]

output of the diode is amplified by the amplifier circuit using transister,and then you can get the required output from IRsensor

[Author]

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