8 Threads found on edaboard.com: 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.
Elementary Electronic Questions :: 09-25-2013 06:27 :: FvM :: Replies: 4 :: Views: 569
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
Microcontrollers :: 09-10-2013 14:00 :: 91divine :: Replies: 49 :: Views: 1871
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 (...)
Microcontrollers :: 06-21-2013 01:21 :: Santhoshksk :: Replies: 2 :: Views: 984
Can Op amp in open loop be used to generate a square wave from sine wave. I am giving a sine wave (10 mV p-p) to an op amp (lm324) in open loop and trying to get a square/rectangular wave. But no luck. In concept, the open loop op amp should saturate/ unsaturate and there should be a dc pulse of nearly the same period as of sine wave (5
Hobby Circuits and Small Projects Problems :: 09-06-2012 04:33 :: Y.li :: Replies: 7 :: Views: 1956
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? (...)
Analog Circuit Design :: 05-13-2012 00:17 :: paipai90 :: Replies: 1 :: Views: 1895
These same questions are on so many websites that I lost count.
Get rid of the lousy old very slow lm324 quad opamp.
Analog Circuit Design :: 12-26-2008 20:34 :: Audioguru :: Replies: 7 :: Views: 15772
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....).
Analog Circuit Design :: 01-28-2005 16:33 :: sinatra :: Replies: 4 :: Views: 12175
Professional Hardware and Electronics Design :: 11-04-2001 15:28 :: sigint :: Replies: 7 :: Views: 3130