Hi all,
I have made a voltage comparator out of a 5 V powered LM358N opamp and it is working just fine. But when I connect the output to digital in on a micro controller (PIC 18F4550) the voltage drops to around 0.6 V and the the low voltage is not enough to trigger the input. I have tried to remedy the problem by using the other half of the opamp as a voltage follower but with no luck.
Do you have any idea to what the problem might be?
Regards
Drohm
I have made a voltage comparator out of a 5 V powered LM358N opamp and it is working just fine. But when I connect the output to digital in on a micro controller (PIC 18F4550) the voltage drops to around 0.6 V and the the low voltage is not enough to trigger the input. I have tried to remedy the problem by using the other half of the opamp as a voltage follower but with no luck.
Do you have any idea to what the problem might be?
Regards
Drohm