Linked Questions

4
votes
2answers
1k views

Saturation problem of comparator [duplicate]

I am trying to design a comparator using a 741 IC, with a single supply of 12V. I have set the reference to 2V and I require the output to toggle between 12V to 0V. but the problem I am facing is the ...
0
votes
3answers
459 views

Op amp output limited [duplicate]

I'm playing around with this op amp: https://www.st.com/resource/en/datasheet/ua741.pdf. My circuit looks like this: It is hooked up to an Arduino Uno. I used analog read on the Arduino to read ...
1
vote
2answers
744 views

Problems with a non-inverting op amp configuration when input voltage is too low [duplicate]

I currently have a very simple op amp circuit for a non-inverting amplifier, using a UA741 with the gain set as 2. I have a sensor that outputs 0-2.3V and I'm attempting to amplify it up to 0-4.6V. ...
0
votes
2answers
381 views

Unexpected output voltage in opamp (LM741, DC, single supply) circuit [duplicate]

As a beginner I tried to make a simple DC circuit with an opamp on a single supply. This is what I came up with: simulate this circuit – Schematic created using CircuitLab I use R3 and R4 as a ...
0
votes
1answer
699 views

Voltage Amplifier using Op Amp 741 [duplicate]

I am trying to build an amplifier using op amp 741. But I am failing to build it on breadboard. I am connecting the positive end of a 9 V battery to pin 7 and negative end to pin 4. As per my ...
0
votes
0answers
28 views

Question regarding an Op-Amp substitution [duplicate]

This schematic has a LM107 op-amp at its heart. It seems that it is now discontinued. Will a uA741 op-amp be a good substitute? If not, why not? What would be a good substitute? Thanks.
29
votes
5answers
4k views

What's the uA741's appeal?

OK, so the uA741 is 42 years old now. For its time it may have been a great opamp; the requirements weren't as high as today, and there was far less competition. But I was wondering what's the 741's ...
6
votes
5answers
3k views

Operational amplifier as a comparator at high frequency

I am trying to generate a sinusoidal PWM signal using analog circuits. I want to compare my sine wave and triangular wave using an operational amplifier (LM741) which has a rise time of 0.3 µs ...
4
votes
5answers
6k views

What is a good alternative for the UA741 opamp in hobby projects?

Related to What's the uA741's appeal?, a lot of schematics use this rather dated opamp. My follow-up question would be: What is a good alternative? Of course if you have specific requirements ...
4
votes
2answers
628 views

Why does the datasheet only has one input bias current value?

There should be two input bias currents, one flowing into or out of the inverting input and the other, the non-inverting input. Their difference is the input offset current. A typical datasheet only ...
-4
votes
3answers
1k views

Reasons for 741 op-amp latching up?

what does 741 operational amplifier latch up mean? what are the reasons IN GENERAL for that? i need a general answer only
3
votes
1answer
5k views

Control duty time and frequency with different potentiometers using one 555 timer

How can I regulate duty time and frequency of 555 timer output with 2 potentiometers?
3
votes
3answers
912 views

Amplifier auto shutdown design

I'm building a Hifi amplifier and I wanted to design a circuit which switches off the power of the amp boards if no music is played for like half a minute. I built it on a demo board but it looks like ...
2
votes
3answers
2k views

Opamp which works with 5 V input

Can an IC 741 op amp can be used with an input voltage of +5 and -5 V? If not so, what are the commonly used opamps that can be used 5 to 12 V?
1
vote
4answers
869 views

What is the use of two power supplies in an opamp?

I am learning about opamps. Now I want to experiment with them but the problem is with -Vee (that negative power supply). I felt like I couldn't design it so opted for ground instead of negative ...

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