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lm324 Comparator Circuit

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8 Threads found on lm324 Comparator Circuit
There's no problem with the part, the behaviour is according to lm324 specification. (You may want to review the datasheet). You can try a pull-up resistor.
This circuit is a substitute for lm324 comparator. This uses a BC547 npn transistor and is biased in such a way that it only gives either 5V or 0V. Values for resistors are R1=1kohm, R2=R3=R4=330ohm. You can feed this signal to your microcontroller and proceed as needed
Rahdirs i want to convert an dc current source input ie. say 0- 75A to voltage of 0-5V using lm324 and i also want the circuit for for using the lm324 as an voltage comparator.. i.e. keeping an reference voltage of 2.5v and comparing with the the voltage which i get it from the current to voltage converter (...)
lm324 is supposed to work as a comparator for 50 Hz, even with only 10 mVpp input. There's a apparently a problem in your circuit.
Hi All, I need help on the IR Sensor circuit using lm324 comparator~the distance between transmitter and receiver is 20cm. 1) How to combine both circuit together? Is the circuit design correct? 2) How to measure the output voltage when the IR sensor is in blocking condition and non-blocking condition? (...)
These same questions are on so many websites that I lost count. Get rid of the lousy old very slow lm324 quad opamp.
I want to use lm324 as an comparator . My bro told me should use LM339 but I don't know the difference among them . The 339 looks similar the 324 (but 339 is open colector ) . I should use 339 in which work and 324 in which work ??