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lm324 Comparator Circuit

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8 Threads found on lm324 Comparator Circuit
I am using lm324 as comparator. I wanted to make output voltage 5V when I receive signal greater than 4V but in fact I just got 3,7 V. My Vcc is 5 V. Whats the problem?
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.
Hello All. I would propose that you switch to TL074. It is probably cheaper than lm324 and offers many advantages. Lower offset, output short circuit protection, etc... I have also successfully used it as comparator and output driver for 50 ohms load (it doesn't give very high output voltage but it is still usefull....). Greetings S.