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long range led emitter and phototransistor circuit

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rascal_141

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longrangeirbeamcutdetector_1292230715.pnglongrangeirbeamcutdetector_1292248033.png

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helo..

this are the two circuit i need to modify with two infrared led and the module need 2 replace with two phototransistor and the distraction of the signal beam will be display the output to the LCD (distraction from led 1 or vise versa)and need to use the PIC.how i can modify it so it can work properly for the long range up to 7 meters ?
any idea how i could do the modification?

thank you.
 

how you thought of using lenses rather than seeking an electronic solution?

Did I miss something? It says it works up to 10m, and your range is 7m. No change is needed.
 

i need to do the modification on the circuit with replace the ir led with two units and the modules to the phototransistors and it need 2 interface with the pic so that can display the result in LCD.i just inform the range of my project.any idea how can i do the modification?
 

sorry but it does not make much sense to me
 

you mean this project wont work ah?
 

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