PIC Microcontroller

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gilardino said:
on both ends, are the same 1.3V.

Finally, i can make it work adding a transistor. So i connect output of sensor to transistor (base), collector to 5V and emitter to PIC. The voltage at the PIC is 2.5V which give logic 1.
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hi,
As the voltage is 1.3V at both ends of the resistor, it suggests the LM324 is at fault.
 
gilardino said:
LM324 is at fault, so did you mean LM324 is spoilt or just it does not match with the microcontroller?
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hi,
Try swopping over output pin1 LM324 for another output on the LM324.

So try using one of the other three OPA's in the quad LM324.
This should prove if the pin 1 on the LM324 is faulty.
 
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