116 Threads found on edaboard.com: 741 Project
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Analog IC Design and Layout :: 22.07.2004 17:47 :: hill :: Replies: 5 :: Views: 1494
There is nothing special about this opamp, you can use virtually any opam, if you have 358, 324, 741 .. any will work ..
The first opamp is just an amplifier (pin2=input, pin1=output), the second opamp works as comparator (pin5=input, 1/2supplyvoltage=pin6, output=pin7) ..
As for RF transistors, if you can't buy them you can find them in any ol
Analog Circuit Design :: 28.02.2006 02:24 :: IanP :: Replies: 13 :: Views: 1520
I also plan to add at least one each of the following:
IC's
7490
7448
556
7555
4013
4066
4017
4011
74LS90
74LS48
7404
7400
Diodes
1N914
1N4001
Transistors
2N2222
2N3904
2N2907
2N3819
2N4841
2N3906
Volt. Reg's
7805
7812
7815
Also a 741, 317, 339 and 386
Hobby Circuits and Small Projects Problems :: 01.08.2007 05:24 :: gbowne1 :: Replies: 9 :: Views: 1577
Hi everyone~
Recently I need to create a circuit with microcontroller based to test IC.
The IC to test at first is 741 op-amp.
Can I know,
What is the basic things that I need to test for 741 op-amp?
What is the tests to be carried on from basic > advance?
How do I test them?
Electronic Elementary Questions :: 06.11.2009 05:12 :: conanhaha :: Replies: 5 :: Views: 2517
LM741 is an old workhorse and it may still be used in the run-of-the-mill applications but nowadays there are so many really good opamps on the market, so don’t look back and try for example the AD620 ..
Rgds,
IanP
:D
Electronic Elementary Questions :: 31.03.2010 16:05 :: IanP :: Replies: 7 :: Views: 1910
Check if the Output is in the range of 89c52?
If it is bellow the limit or above the limit it will not be detected.
So can you please measure the OFF state voltage and ON state voltage at the output of 741?
and also check the oscilator frequency.
Make a pulse generator using 555 and check if you are able to count the pulses. If you do then adjust
Analog Circuit Design :: 27.04.2011 10:37 :: bluehole :: Replies: 5 :: Views: 1294
Well you need to be a little more specific about that, but as far as i can make of it, its going to be pretty difficult doing what you asked.
Instead you could replace both the leg motors with just one simple DC motor. But you'll have to feed the DC motor with inputs from both the leg motors along with using simple diodes.
A more detailed way of p
Hobby Circuits and Small Projects Problems :: 01.06.2011 05:51 :: Nitish Reddy :: Replies: 10 :: Views: 921
can you suggest me nice project with the help of 741 op-amp....currently i m making a radio using 741 op-amp.....still can u help me for another...with circuit should not be very complex.....simple & easily implemented....
if you can...
thank you very much....sir....u can also suggest topic on LM380 audio amplifier....or 555 ic tim
RF, Microwave, Antennas and Optics :: 30.08.2011 14:54 :: pateldivyesh68@gmail.com :: Replies: 2 :: Views: 1233
Your 741 V- terminal is connectecd to Vin - input terminal pin 2 ...And the 1Kohm is between the Gnd and such , V+ to gnd is 1Kohm but V- to gnd is only 500 Ohm. thus supply across OPA is biased at 7.5VDC on + side and 2.5V to minus .The negative sided swing of the data has onesided clippings and bounds with a distorted signal.
Analog Circuit Design :: 17.03.2012 20:28 :: vimalkhanna :: Replies: 18 :: Views: 766
hi guys,
i'm trying to build a circuit that will take the inverting dc voltage output from the pc speaker out and level shift it then using it as input to pic and send it back serially to pc program,
the idea is to read the voltage signal (audio) and input the reading to pc
i searched and found a lot of articles that talks about using 741 op
Digital Signal Processing :: 15.05.2012 15:53 :: kobre98 :: Replies: 17 :: Views: 798
For my senior design project I will be designing an operational amplifier testing device.
The goal is that a student can plug in an Op Amp (741) and a screen will display the measured parameters of the op amp. The testing device should be able to display all of the parameters that can be found on the 741 data sheet. Then the display will (...)
Microcontrollers :: 18.02.2013 19:50 :: MJaske :: Replies: 3 :: Views: 111
The + input of IC1 is held at +12V
The - input of IC1 will not go higher than +12V, so there is a good change that IC1 output will be permanently high.
I would have put a potentiometer (maybe 100k Ohms) on the + input of IC1 to provide a variable reference voltage.
I am assuming that IC1 is a 741 op-amp or similar?
Microcontrollers :: 05.04.2013 18:37 :: hexreader :: Replies: 3 :: Views: 104
I just found this on the web. Again it probably is not exactly what you are looking for but hopefully will get you R4 and P1 set the level (Vref) that the comparator (U1) is going to switch on. Pin 2 of U1 is the input voltage that you are trying to measure. When the input voltage i
Professional Hardware and Electronics Design :: 23.07.2002 20:00 :: aglet1000 :: Replies: 10 :: Views: 787
Fitter output from "minimal_32" sample from Nios 3.01:
+---------------------------------------------------------------+
; Flow Summary ;
+-----------------------+---------------------------------------+
; Flow Status ; Successful - Fri Mar 19 10:24:10 2004 ;
; Revision Name
PLD, SPLD, GAL, CPLD, FPGA Design :: 19.03.2004 09:41 :: davorin :: Replies: 24 :: Views: 4298
i like to take old analog ic and take it apart, finding all the clever things that the designer did. maybe the equations help, but knowing when to cascode and when not to - much more important.
grey and meyer (an excellent text i think) does this for 741, 506 PLL, and several other sub circuits in later chapters. it's the text used by most gr
Analog Circuit Design :: 19.12.2003 07:49 :: electronrancher :: Replies: 38 :: Views: 5452
Anything op-amp has been designed and tested to death i think! I'll do a short test list for the LM148, National's version of the 741.
Datasheet is here:
A quick look thru the EC table will tell you the test list - TYP is most likely not tested, or just a quick functional test. MIN/MAX are al
Analog IC Design and Layout :: 19.12.2003 03:25 :: electronrancher :: Replies: 10 :: Views: 3256
Even a 741 can do the job. Do you mean you're taking the power from the telephone line? The line voltage at idle is about 60V. Do take note on that.
Analog Circuit Design :: 02.01.2005 04:15 :: yeechyan :: Replies: 5 :: Views: 2093
well this is my icd...
no nice.... but is working!!
whit max232 16f876/a edn lm 358 or 741 or tranzistors.
lotar's project
big bgi BIG BIG THANK YOU
Microcontrollers :: 03.10.2007 23:41 :: zoro1 :: Replies: 271 :: Views: 144273
A lot depends on the anticipated time from peak to peak, and the format you want it in. If the time domain is fairly predictable, and you want a digital output, then I would suggest using a fixed clock, an op amp, a pair of flipflops, a couple of 8 bit counters, and a schmitt triggered nands. With this logic you can detect the first "voltage" pea
Hobby Circuits and Small Projects Problems :: 06.09.2004 22:00 :: Fish4Fun :: Replies: 5 :: Views: 837
Objectives
? To carry out the design of an analogue chip from customer specifications and produce a prototype.
? Analyze, design, simulate and test analogue circuits at different frequencies.
? To operate in a design team based environment.
? To develop best performance chips through design economics and creativity and innovation.
Educ
EDA Jobs :: 17.09.2004 10:10 :: zahrein :: Replies: 15 :: Views: 4812
Hi all:
How to begin with development of eda tools like simualtion and synthesing tools, what elementary knowedge should be known, and where I can find the resourse and tutorials to start!
thanks
Tutorials? What tutorials? To learn how a 741 op-amp works?
It is easy for a CAD program, maybe for PCB somewhat to do
Electronic Elementary Questions :: 03.12.2004 07:23 :: djalli :: Replies: 3 :: Views: 977
after some tests I did not arrive the conclusions
i use ampop inverting way but I want to invert
the out signal of the sensor (0 to 5 for 5 to 0 (not -5V))
if it will not be very work you can post or send a small project for help.
the power for 741(?) it must be 5v/0v not 5,0,-5
many
Robotics and Automatics Forum :: 09.01.2005 22:22 :: mostrengo :: Replies: 5 :: Views: 966
hi all
this is a very nice collection of tutorial circuits hope it'll be helpful for all of u
cheers
Contenents
7_2 Volt NiCad Cycler
555 Timer Go-No-Go tester
555 Timer IC Tester
555 Timer-Oscillator Tutorial
741 Op-Amp Tutorial
A Super-Simple NiCd-Battery Rejuvenator
ASSP ODD Product Lineup2
ASSP ODD Product Lineup3
Service Manuals, Requests, Repair Tips :: 08.02.2005 14:52 :: sawwa7 :: Replies: 7 :: Views: 9160
as the other freinds told you
first: define each component and how it works
2nd: try to read about the famous ic's eg:LM555 & LM358, 741
and their applications.>>(application notes)
3rd: try to read some data sheets in order to be familer with how to get your need from such a file which contains many informations.
4th: try to read and
Electronic Elementary Questions :: 28.05.2005 14:37 :: mmohsen :: Replies: 23 :: Views: 2666
Hi all,
Thanks a lot for helping me...
I built the sensor part and it is working well... Here are the things what I did.
I used an IR LED and sticked a piece of reflective tape on the motor shaft (please note that motor shaft is black).
Then I used an IR sensor from an old mouse and put some electronics(741 OPAMP and 311 comparater).
Hobby Circuits and Small Projects Problems :: 10.06.2005 11:11 :: randika :: Replies: 11 :: Views: 9045
I have a oscilloscope but how do i measure these different scales
1.) dB
2.) dBm
3.) dBV
dB uses for compress scale to describe fractions in (very) wide range
dB = 10 * log10 ((power out) / (power in)) for power fraction
and
dB = 20 * log10 ((voltage out) / (voltage in)) for Voltage (or Ampere) f
Electronic Elementary Questions :: 06.06.2005 01:34 :: xxargs :: Replies: 15 :: Views: 872
Attached you will find a circuit that incorporates L200+741. Tis circuit will show you connections to transformer+bridge. As the smoothing capacitor use at least 2200?F electrolytic capacitor, rated for 40V (or more), and add these 2 capacitors to the output: 10?V/35V tantalum and 100nF ceramic.
These thick lines can be connected together and trea
Electronic Elementary Questions :: 12.07.2005 05:04 :: IanP :: Replies: 18 :: Views: 14947
Yes, but you don`t should works the 741 in this topology. If you need know more about comparator, you can read the book, Microelectronics by Rashid, or Microelectronics by Sedra.
Electronic Elementary Questions :: 09.12.2005 20:47 :: JoseLeonardo :: Replies: 15 :: Views: 3081
Wao! i got it!
I follow your suggestion to set up. But the invertion of motion detector output, i didnt use the transistor driver. Instead, i use a 741 Op-Amp and set it as a inverter circuit.
Then for the 555 monostable timer, i did follow your diagram. But i take out the 10kΩ resistor between 2 and +5V. This is because i cant figure out w
Microcontrollers :: 29.12.2005 16:08 :: Twins_sasa :: Replies: 9 :: Views: 1133
Thanks Ianp for such a good help. while searching on this site i found this discussion, in which u have given a peak detector and zero-crossing detector circuit. Can you please tell me four things:
1. is it compulsory to use transformers, cant i use directly a 10M ohm resi
Analog Circuit Design :: 07.01.2006 04:10 :: lats :: Replies: 34 :: Views: 12009
u can try out in robotics....
like fire extinguisher robot..which can be easily developed from the scrap material like
a car,fan motor....and some circuitary using 741 op amps,power amplifiers,so on...
Electronic Elementary Questions :: 17.01.2007 19:05 :: anusha21 :: Replies: 8 :: Views: 629
title:
Two decade BJT-OP AMP cascade inverting voltage amplifier
SPECIFICATION:
only one BJT,One OP AMP UA 741 and a single power supply of 12v must be used.
a 10K ohm load and an input signal will be connected via capacitors to the amplifier.The maximum voltage gain is about -500. Input impedance is about 600 ohm.output impedance is abou
Analog Circuit Design :: 03.03.2007 12:25 :: wanelec :: Replies: 5 :: Views: 3003
please show me the circuit of "Two decade BJT-OP AMP cascade inverting voltage amplifier".
SPECIFICATION:
only one BJT,One OP AMP UA 741 and a single power supply of 12v must be used.
a 10K ohm load and an input signal will be connected via capacitors to the amplifier.The maximum voltage gain is about -500. Input impedance is about 600 oh
Analog Circuit Design :: 06.03.2007 05:29 :: wanelec :: Replies: 1 :: Views: 542
what is the output that you got using an 741 because as far as i know 40kHz with a gain of 4 is easy enough for 741 to amplify....
if you state the source of input and the output to be driven it would be even better...
Analog Circuit Design :: 02.10.2007 12:36 :: A.Anand Srinivasan :: Replies: 10 :: Views: 2289
you may use opAMP 741 ic
or a simple oscilltor consisting of a bjt and some resister/capcitors can work for you.
Analog Circuit Design :: 12.11.2007 12:16 :: abaidullah :: Replies: 2 :: Views: 587
Looking at the shcematic Q1 is your mosfet which is fed by the op-amp, in my thinking and understanding it could be be either the mossfet is not supplying the variable voltage eihter the drive current is not enough or it could be driven to hard casuing the mosfet to be fully switched on and not making the voltage variable or you could of chosen the
Microcontrollers :: 04.02.2009 06:46 :: wizpic :: Replies: 318 :: Views: 60007
Hello , I'm in computer engineering department . i design some project with my own idea . i use LM741 op-amp to output amplified voltage that i needed but output current is less than < 20 MA and i want to reach 1 A at least. so anyone knows how to reach this current value without changing this voltage value , like current amplifier or operational a
Analog Circuit Design :: 10.03.2008 21:33 :: bekerpico :: Replies: 1 :: Views: 539
I am sorry but I doubt I can help you to design such linearization circuit. I did it about 30 or 35 years ago with very first ICs like 709 and 741. Frankly speaking I do not remember all the details and definitely schematic technology changes much since that. Moreover, I did not work with OP amps for at least 15 years, so my experience in this area
RF, Microwave, Antennas and Optics :: 13.06.2008 06:15 :: RF-OM :: Replies: 30 :: Views: 1300
Medical electronic products are supposed to have perfect isolation from an AC powered power supply to avoid electrocuting a patient if something shorts.
Pin 5 of the instrumentation amplifier is supposed to be grounded. Yours doen't work probably because the inputs do not have a path to 0V. Usually the patient is connected to 0V.
Your instrum
Hobby Circuits and Small Projects Problems :: 29.06.2008 15:47 :: Audioguru :: Replies: 119 :: Views: 20020
You forgot to say the frequency of the signal you want to amplify. AM radio is at 540kHz to 1.6MHz.
A lousy old 741 opamp has trouble with frequencies that are higher than only 9kHz.
If you make your own RF amplifier then it will probably be overloaded by local AM radio stations.
EDIT:
I did not see page 2 of this thread.
Analog Circuit Design :: 07.05.2009 15:48 :: Audioguru :: Replies: 31 :: Views: 2721
I've coded it in C but I think is very very easy translate the routine inside the lcd-lib.c file in assembly. Let me know if you need help, at now I've no more time but into the next days I can try to make the translate to asm.
To help you in a fast way I've attached the asm listing, this is the compilation result then you can make the chan
Microcontrollers :: 29.09.2008 09:38 :: TekUT :: Replies: 11 :: Views: 10646
Hi to all,
I have made a LM35 temp sensor circuit for sensing temp. I've placed my sensor in the voltage divider circuit as a resistor. So the output variation amplified using an 741 ref is 2.6v. Then ouput is connected with ADC0808 sensor input. So this is the connection. ADC0808 digitl output connected with 8 LEDS. Then i've applied
Microcontrollers :: 12.12.2008 08:49 :: dhanraj_kmr :: Replies: 3 :: Views: 945
Hi,
Do you already have a bulk 48V power supply that you intend to use, or do you want to design that part as well? A flyback design will cope easily with the 60 to 70W that you require for your regulator input, these are isolated and a number of reference designs exist for offline PSUs, the efficiency is usually about 70%. This bulk supply PSU
Analog Circuit Design :: 14.11.2008 14:22 :: DrBob13 :: Replies: 5 :: Views: 4705
i found the solution. i'll use an op amp 741 and i'll set the gain between 0 and 1 whatever my application requires. that will solve my problem with the least effort. the resistive divider wont work for AC. its for DC
Analog Circuit Design :: 03.12.2008 11:42 :: kahafeez :: Replies: 4 :: Views: 518
i need 741 OPAMP based level shifter for my project
Added after 13 minutes:
friends help me....
in my college lab 741 only available by using that only i have to design
Digital Signal Processing :: 07.01.2009 11:28 :: tamil_yes :: Replies: 11 :: Views: 16123
it is not a project for beginners. OPamp 741 is not superb component, after adc obvious must follow DSP for various kind of filtering (50Hz, 60Hz, ...) and the latest is MCU. This can be quite slower. It is for dipslay, kbd,... handling. But the mosti important part of ECG is input module and DSP.
good luck
Microcontrollers :: 15.01.2009 09:11 :: bohumilfulin :: Replies: 7 :: Views: 6605
Could you pls tell me your idea? You want to generate a DC voltage (with noise) at node 4? Then use the LM741 to amplify the noise signal?
I think you have to block the DC voltage and add input resistor to the amplifier, otherwise the output of the amplifier will only be the negative supply voltage.
Analog Circuit Design :: 26.02.2009 14:22 :: rockycheng :: Replies: 14 :: Views: 1081
sorry about being vague ..... the thing is .... as i described earlier .... i wil have to build a circuit which wil extract very weak signal from noise which is atleast 10 times larger than the original signal
only using a low pass filter here wont give me the perfect result .... so firstly .... i send my original signal which i added wit the n
Analog Circuit Design :: 01.03.2009 21:53 :: niloy2k :: Replies: 15 :: Views: 2276
The input pin 3 of your 741 opamp is 0V so it will not work. Since you have a single supply voltage then the opamp input must be at half the supply voltage.
The lousy old 741 opamp was designed to use a 30V supply and will not work from a supply as low as 5V.
The bandpass filter must be fed from a very low impedance like the output of an opam
Analog Circuit Design :: 15.04.2009 16:18 :: Audioguru :: Replies: 9 :: Views: 4095
Hi all,
I have bought a GCSE component pack. It is an assortment of electronic components housed in a quality storage box intended for students following the GCSE courses in Electronics. The pack includes a wide selection of capacitors, resistors, transistors, diodes, ICs, LEDs and a stripboard for assembling projects.
Its contents are followin
Electronic Elementary Questions :: 23.05.2009 21:49 :: blerman13 :: Replies: 5 :: Views: 907
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