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how to interface photo diode with microcontroller ?

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mishra12

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hi
i am doing laser light data and voice communication project .i have few but major difficulties in interfacing photo diode to 89c51 to rxd pin can any one provide me the working circuit diagram of it?
 

Use inverting amplifier ; replace input resistor with photo diode(reverese bias) and a feedback resistor of 10 M ohm for a binary (on -off output)
 
hi,

I have a same problem.in which i am using 10 photo diode each one is used for particular height.

I always want to get a output of this photo diode to give to my micro controller .and then i will give a output using some logic programming.

Now there is big confusion of basic circuit.In this thread its connected with op-amp.
bit is this also used for 670 nm red visible light photo diode ?

i am going to use this one for my photo diode.

Please guide me for this.

Thanks.
 

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