25 Threads found on edaboard.com: lm324 Comparator Circuit
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 :: 13.05.2012 00:17 :: paipai90 :: Replies: 1 :: Views: 1249
Professional Hardware and Electronics Design :: 04.11.2001 15:28 :: sigint :: Replies: 7 :: Views: 2912
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 :: 28.01.2005 16:33 :: sinatra :: Replies: 4 :: Views: 8457
I want to make an infrared sensing circuit. This is the idea:
A LED will emit light to a paper for example, this paper have black and white line next together. The light beam will reflext different (weak or stronger) when meeting black or white light. The reflext beam will fed into an infrared sensing diode next to the LED. By this method, the ou
Hobby Circuits and Small Projects Problems :: 04.06.2005 22:33 :: nobtiba :: Replies: 1 :: Views: 1860
I cannot see any component values, but I think the problem is that with lower supply voltages, the output cannot trigger the comparator. That could be because the lm324 output is about 1.5V below the supply rail. So if you power it at say, 3V, then the output can only go to 1.5V. If the comparator's threshold is higher than 1.5V, then the (...)
Analog Circuit Design :: 21.07.2005 19:45 :: VVV :: Replies: 12 :: Views: 7654
May I know what is the function of this circuit. I have used lm324 in my circuits before but never came across this circuit configuration.
Thanks you in advance.
Analog Circuit Design :: 17.12.2005 06:04 :: contagiouseddie :: Replies: 5 :: Views: 6842
To control logic for 4066 switch which is fed of symmetrical supply (+/-5V) must also operate between -5V (for 0) and +5V (for 1) ..
This, however, shouldn be difficult to realize ..
For example, if you take the lm324 opamp (it contains 4 opamps in one enclosur - one opam per one ? 4066 switch) and use it as comparators - means, you will connect
Hobby Circuits and Small Projects Problems :: 25.06.2006 08:50 :: IanP :: Replies: 6 :: Views: 2138
LM 741 or
these are commonly used and easily available comps which does your job.there are even more and better ones.
Electronic Elementary Questions :: 17.04.2007 04:25 :: cameo_2007 :: Replies: 4 :: Views: 785
hey i tried the circuit with saw toothed wave and ua 741. Then with lm324.. Find the document attached.
The +vsat is not acheived .. that i have to look into why.. do some study n share the analysis...
Analog Circuit Design :: 22.03.2010 09:06 :: abbeyromy :: Replies: 3 :: Views: 1560
Is there any way that I could introduce some delay around IC1 (lm324) with just some capacitance and resistance?
Not really, if, for example, you "experiment" a little bit with C10 by increasing its value you'll see that the circuit will stat missing claps ..
IC1-D is a comparator with hysteresis that switches when i
Analog Circuit Design :: 26.04.2010 21:44 :: IanP :: Replies: 3 :: Views: 2050
its better to use single power supply op amp like lm324,lm358,etc
or use comparatore like lm393,lm311,etc
if u want to cancel that 2volt just add zener diode around 3v with output
u have enough signal to drive base of bjt transistore then use circuit like
this may be help u
Analog Circuit Design :: 15.07.2010 15:01 :: nashwan :: Replies: 4 :: Views: 667
how to remove noise from the output of lm324 comparator?
what values of capacitors must be used to get dc output?
Microcontrollers :: 19.02.2012 10:26 :: nishahv :: Replies: 2 :: Views: 162
Only now I noticed the pin numbers... They are not for LM339... right?
Sorry I confused it with lm324 :sad:
Microcontrollers :: 26.02.2012 11:04 :: KerimF :: Replies: 13 :: Views: 642
Actually I have a 12v 14AH SLA battery and I was wondering :-? that if I can make a auto-cutoff charger for the same, I can easily make a simple charger for the same but I don't know how to get that cutoff section work for protecting the battery to get overcharged. I guess I'll require a voltage comparator (lm324 - I saw it in most of th
Hobby Circuits and Small Projects Problems :: 20.07.2012 01:00 :: cyberpks :: Replies: 22 :: Views: 3801
I have build a project using AT89S51 and comparator lm324. The input to uC is from comparator that the inverting input is connected to infrared sensor and the non-inverting input set as the voltage reference (Vr). For certain distance the output voltage from infrared sensor is higher than the Vr so that the output from (...)
Microcontrollers :: 29.11.2012 02:51 :: giordano :: Replies: 7 :: Views: 364
I am making a project using LDR sensors.
For converting the analog voltage of LDR to the digital one,I am using an LM 324 IC.
I am giving the LDR connection to the non-inverting input of lm324(pin 3) and a potentiometer to the inverting input of the IC(pin 2).
When the voltage at pin 3 > voltage at pin 2(the reference voltage),i should get
Robotics and Automatics Forum :: 01.01.2013 00:03 :: shubham_k :: Replies: 2 :: Views: 302
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 :: 21.06.2013 01:21 :: Santhoshksk :: Replies: 2 :: Views: 356
I want a op- amp(lm324) based one second time delay startup circuit
Analog Circuit Design :: 07.01.2006 21:37 :: satya_vijayawada :: Replies: 4 :: Views: 6157
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 :: 26.12.2008 20:34 :: Audioguru :: Replies: 7 :: Views: 13561
i completed the circuit for square wawe generator , variable frequency from o hz to 5 khz , i used lm324n ic for the same ,
now i m looking for the delayed output for some application (one circuit output is normal and other circuit output is delayed with same frequency and magnitude)
i attached the photograph of (...)
Electronic Elementary Questions :: 10.07.2009 14:59 :: nilsone230384 :: Replies: 5 :: Views: 1002
Unfortunately, the circuit doesn't work with TL082. You need an OP with common mode range down to negative supply voltage, e.g. lm324, TLC082 or a recent rail-to-rail OP.
Hobby Circuits and Small Projects Problems :: 02.01.2010 05:25 :: FvM :: Replies: 4 :: Views: 4797
Instead always swicthing on the heater when the inveter is off, you may consider to design it in a precise way, so that you switch a heater coil, through a relay, when the temperature in the Inverter cabinet decreases below a certain point. This can be easily done with a comparator IC like lm324 or LM358 or so.
Power Electronics :: 12.04.2010 03:56 :: pranam77 :: Replies: 2 :: Views: 424
For this you need to understand,i fyou have not done about two basic circuitrys.
Refer Data sheet
2. OPAMP as comparator
Refer this link
Now, you will know that the LM35 would give a DC voltage at the output with respect to the temperature.
And you have
Analog Circuit Design :: 17.05.2010 01:00 :: cameo_2007 :: Replies: 2 :: Views: 772
Generally speaking, no, there aren't good circuits to reduce the ambient interference. One of the primary sources of anguish for the students when I was in school, doing a similar project, were the fluorescent lights. Their flickering (too fast for human eyes to perceive) was significant, and generally made coding the contr
Microcontrollers :: 22.12.2010 03:06 :: faris88 :: Replies: 19 :: Views: 2399
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 :: 06.09.2012 04:33 :: Y.li :: Replies: 7 :: Views: 1181