ericgibbs Well-Known Member Most Helpful Member May 28, 2009 #21 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. Click to expand... hi, As the voltage is 1.3V at both ends of the resistor, it suggests the LM324 is at fault.
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. Click to expand... hi, As the voltage is 1.3V at both ends of the resistor, it suggests the LM324 is at fault.
G gilardino New Member May 28, 2009 #22 LM324 is at fault, so did you mean LM324 is spoilt or just it does not match with the microcontroller?
LM324 is at fault, so did you mean LM324 is spoilt or just it does not match with the microcontroller?
ericgibbs Well-Known Member Most Helpful Member May 28, 2009 #23 gilardino said: LM324 is at fault, so did you mean LM324 is spoilt or just it does not match with the microcontroller? Click to expand... 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.
gilardino said: LM324 is at fault, so did you mean LM324 is spoilt or just it does not match with the microcontroller? Click to expand... 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.
ericgibbs Well-Known Member Most Helpful Member May 28, 2009 #25 gilardino said: I try all already. It is the same. Click to expand... hi, Whats your location.?