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Q&A What is the difference between differential amplifier and differentiator?

I need to know what is the difference between differential amplifier and differentiator A differential amplifier amplifies the difference voltage between two signal voltages. A differentiator ...

posted 4y ago by Andy aka‭

Answer
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+1 −1
Q&A Humming noise from a boost converter's inductor

First, draw schematics properly when you ask others to look at them. Your right to left flow is rather annoying. There are two main possibilities for this circuit to cause noise, the inductor and ...

posted 4y ago by Olin Lathrop‭  ·  edited 4y ago by Olin Lathrop‭

Answer
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+1 −1
Q&A Driving LED with NPN transistor from I/O pin

No need to power the led with 5V. 3.3 V should suffice! Before I come to problem of regulating the current with only 3.3V, I wish to state some general simple constructions. Technically speaking,...

posted 4y ago by coquelicot‭  ·  edited 1y ago by coquelicot‭

Answer
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Q&A Driving LED with NPN transistor from I/O pin

I have tried to drive a series of smd led with constant current. If it is rated for 3.3V, I run it at around 3V. It doesnt get hot even without a heatsink, ~60C. So thermal runaway is only a proble...

posted 4y ago by timelyfiasco‭

Answer
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+2 −3
Q&A Why isn't voltage of electric chair higher?

I recall vividly a story told by my grandfather who worked with high voltage power lines. A worker drove heavy machinery into 700kV line and then jumped out of the truck, instantly combusting upon ...

2 answers  ·  posted 4y ago by Kranulis‭  ·  last activity 4y ago by manassehkatz‭

Question high-voltage safety
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Q&A Parallel RLC circuit

How to find the equation of voltage of the top common node of R1,L1 and C1 after the switch is moved?

1 answer  ·  posted 3y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

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Meta How can we grow this community?

I think this site needs to get an aesthetic make-over in order to make users coming back. This may be because I'm accustomed to StackExchange's appearance but to be honest, this site is ugly and u...

posted 3y ago by Carl‭  ·  edited 3y ago by Carl‭

Answer
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Q&A Splitting of message inside the layers [closed]

Assume a app generates a message (stack on computer).Each layer of the sending entity will put then control information in the data depending on the protocol and transmit the data to the next lowe...

0 answers  ·  posted 3y ago by MissMulan‭  ·  closed 3y ago by Nick Alexeev‭

Question protocol network
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Q&A Series RLC circuit

How to find the equation of current of the RLC circuit after the switch is moved?

1 answer  ·  posted 3y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

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Q&A Find Q point in common base BJT configuration

Suppose we have this graph: How can we find the operating point (Q)?In common emitter collector we just draw a line from the vertical axis (Ic) at the point (0,VCC/RC) to the horizontal axis a...

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

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Meta Let's make all downvotes public

I've upvoted the post of Olin because I think this is obviously better than the current situation. Nevertheless, this does not completely solve the problem of trolls using multiple accounts. I thin...

posted 3y ago by coquelicot‭

Answer
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Q&A Critically damped oscillation issue

I have a question about this circuit:(critically damped oscillation) For a critically damped oscillation for a series RLC circuit the equation of current has this form I(t)=D1te^(-at)+D2e^(-at) ...

2 answers  ·  posted 3y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

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Meta What should rep gain/loss be on Papers?

I think they should have the same rep as ordinary posts. If they are high quality they will eventually accumulate a lot of up-votes over time. That's how the voting system is supposed to work, rewa...

posted 4y ago by Lundin‭

Answer
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Q&A Usage of modern active building blocks [closed]

In the past, a large number of new active building blocks have been proposed and published by many researchers all over the world. In most cases, these new building blocks were used for realizing n...

0 answers  ·  posted 4y ago by LvW‭  ·  edited 4y ago by LvW‭

Question amplifier
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Q&A Is there a mathematical process resembling the terms "digital"/"discrete" and "analog"/"continuous"?

Discrete sets, as ℕ ℤ and ℚ, are in bijection within themselves, and the number of elements in them is Aleph (א) sub zero. Continuum sets as ℝ or 𝕀 are not in bijection to the former ℕ ℤ ℚ, and th...

posted 4y ago by .                                                .‭  ·  edited 3y ago by deleted user

Answer
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Q&A Flash light frequency and rise time calculation

I was analyzing the design a hazard warning light.The spec of the light turn on off is given below. The flashing-light frequency shall be 90+/-30 times per minute. May I know in this case the...

1 answer  ·  posted 8mo ago by newbie‭  ·  last activity 8mo ago by Olin Lathrop‭

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Q&A How do we calculate signal rise time from frequency

May I know how to calculate a signals rise time from it's frequency. I found this article for the same. The formula given is Tr = 1/f*π. May I know is this applicable for PWM also.

1 answer  ·  posted 8mo ago by newbie‭  ·  last activity 8mo ago by Olin Lathrop‭

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Q&A discharge slope logic (fixed sloppinees question) [duplicate]

Hello, I want to understand the math of the phenomena of capacitor as temporarary means of increasing the current supply. First I have created a current limited voltage source which give me 45V a...

0 answers  ·  posted 7mo ago by yefj‭  ·  closed as duplicate 7mo ago by Olin Lathrop‭

Question slope
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Q&A capacitor to overcome voltage source limitation [closed]

Hello,i need to drive 5 mosfets as shown below. Each mosfet draws 15A when the pulse opens the mosfet. My power supply is gives the 48V but only 3.3A,If I understand correctly I need to put very...

0 answers  ·  posted 7mo ago by yefj‭  ·  closed 7mo ago by Olin Lathrop‭

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Q&A What are closest free or low-cost alternatives to software like Ansys PCB modelling? [closed]

What are closest free or low-cost alternatives to software like Ansys PCB modelling? https://www.ansys.com/blog/optimize-your-pcb It's too costly for study purposes. To clarify: I am looking fo...

0 answers  ·  posted 4mo ago by mavavilj‭  ·  closed 3mo ago by Nick Alexeev‭

Question software-tools
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Q&A Suggestions for projects in Embedded systems [closed]

Currently, I enrolled myself in a master's course this fall in the field of Computer Engineering. I am excited to create my microcontroller projects. I want to understand how much complexity is exp...

0 answers  ·  posted 1y ago by aditya98‭  ·  closed 1y ago by Nick Alexeev‭

Question microcontroller
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Q&A Will shorting a lithium ion battery cause an explosion?

Will shorting a lithium ion battery cause an explosion? Chain Reaction: The release of flammable gases can lead to a chain reaction, where the heat generated by the short circuit causes even m...

posted 1y ago by TonyStewart‭

Answer
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Meta What are the guidelines for porting one's answers from ElectricalEngineering.SE, if any?

Since my question didn't get an answer yet, I post this answer as a possible solution. What I'll describe is not meant to be the right way to port an answer from SE network, but just a possible ri...

posted 3y ago by Lorenzo Donati‭

Answer
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Q&A How long does it take for energy to propagate in a circuit?

So here's the thing. Energy doesn't "propagate" as the video suggests. Energy is used. A voltage potential may propagate, but a voltage potential is not energy. Considering the video With the dia...

posted 3y ago by Enginidiot‭  ·  edited 3y ago by Enginidiot‭

Answer