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: 1587
Professional Hardware and Electronics Design :: 04.11.2001 15:28 :: sigint :: Replies: 7 :: Views: 3001
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: 9895
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: 2040
Im using this ckt, its basically a sawtooth generator using a lm324. It works okay. my problem is that the ckt doesn't oscillate when i input 5,4,3,2,1 volts but its fine @ 6volts up to 15V. @ 5,4,3,2,1volts the ckt outs a DC voltage. Ive tried to use schottky diodes and reduced resistor values but still no progress/change.
Analog Circuit Design :: 21.07.2005 13:13 :: ichibindigi :: Replies: 12 :: Views: 8213
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: 7039
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: 2324
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: 855
I'm building a comparator with hysteresis using an opamp, and I follow whats in the datasheets (lm324). Below is the circuit diagram of my design, and the output signal wave. I need to build a comparator which output voltage is +2V and -2V, and the hysteresis value Vt=1V. From the datasheets, i found that this (...)
Analog Circuit Design :: 21.03.2010 21:01 :: mmnr00 :: Replies: 3 :: Views: 1664
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: 2248
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: 750
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: 229
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: 765
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
Hobby Circuits and Small Projects Problems :: 20.07.2012 02:06 :: tpetar :: Replies: 22 :: Views: 4611
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: 490
The 3V Voh is specified in the datasheet of the lm324 with Vcc=5V and RL=2kohm. Normally the input level requied is >2.4V for a HIGH level. If you connect 5V to the PC input port and the program does not start - you have problem with the program.
Enjoy your design work!
Robotics and Automatics Forum :: 04.01.2013 09:31 :: HTA :: Replies: 2 :: Views: 366
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: 585
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: 6646
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: 14614
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: 1073
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: 5334
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: 483
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: 849
lm324 is amplifier.. use LM393 for comparator
Microcontrollers :: 22.12.2010 03:09 :: ckshivaram :: Replies: 19 :: Views: 2596
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.
Hobby Circuits and Small Projects Problems :: 06.09.2012 04:59 :: FvM :: Replies: 7 :: Views: 1461