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Q&A How to estimate time of completion while developing an electronic product?

I'm actually an algorithmic engineer, not an electronic engineer. But your question is extremely general, and valid for every field of engineering. Also, it obviously depends upon the human and tec...

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

Answer
57%
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Q&A ESD Protection - Differential Amplifier

More about the circuit The circuit is sensing (low side sensing for many reasons) current used to power up the lights with 28V(part of the schematics not shown here -> relay with LC filter ...

3 answers  ·  posted 4y ago by 2kind‭  ·  edited 2y ago by Lorenzo Donati‭

Question ESD-protection TVS opamp circuit-design
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Meta Homework questions / "ask an engineer".

I think the bullet list in the current on-topic page is clearer and easier to understand. Admittedly, there are some "confrontal" bullets, but that's OK in my point of view. Sure, there are always...

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

Answer
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Meta How about a new section for code reviews?

Personally I wouldn't want another category (what you seem to mean by "section"). I also don't think this should be a code review site. However, asking for validation and advice on small and spec...

posted 4y ago by Olin Lathrop‭

Answer
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Q&A Why isn't voltage of electric chair higher?

I think your grandfathers story is, shall we say, apocryphal. You should know that electrocution kills by stopping the heart (or causing fibrillation), and the heart must be kept from beating long...

posted 4y ago by Elliot Alderson‭

Answer
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Q&A How building a follower satisfying rather extreme requirements.

What is your best suggestion for building a follower that would ideally satisfy the following spec: frequency: from 100 Hz (or lower) to 1 GHz input signal impedance: 1 Mohm input signal ampli...

1 answer  ·  posted 4y ago by coquelicot‭  ·  edited 2y ago by Lorenzo Donati‭

Question transistor opamp voltage-follower circuit-design
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Q&A What is causing this massive discharge traveling down a power line?

What is causing this [ABC-news video via Twitter] spectacular power-line phenomenon? [image: still from ABC News]

1 answer  ·  posted 4y ago by Pete W‭  ·  edited 2y ago by Lorenzo Donati‭

Question power-grid electromagnetism
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Q&A How can I debug, (and eventually fix) this Roomba PCB? [closed]

I've got a broken roomba, I've tried new batteries and a working charger. The charger is supposed to output 20V-24W when the roomba is plugged in. the picture just shows how I'm measuring the pow...

1 answer  ·  posted 4y ago by dustytrash‭  ·  edited 4y ago by dustytrash‭

Question errors battery
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Q&A What to check for when buying an electronic component or module?

Any electronic component or module you buy for a project or design should have a data sheet. By data sheet I mean a portable document format (PDF or equivalent) like this: - Do not assume that...

posted 5y ago by Andy aka‭  ·  edited 5y ago by ArtOfCode‭

Answer
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Q&A pH Electrode Buffer - Offset when solution grounded

Problem pH electrode buffer offset appears when solution is grounded. Detail I have a pH electrode in some conductive solution (~1000uS). The output (measurement electrode) is buffered by an el...

2 answers  ·  posted 2y ago by rherma‭  ·  last activity 2y ago by TonyStewart‭

Question high-impedance pH
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Q&A Choosing Y value in photoresistor graph

I have designed a graph of the current in a photoresistor related to the brightness of light which hits the photoresistor. Our professor told us that it is more correct to draw the Current/Brigh...

1 answer  ·  posted 3y ago by MissMulan‭  ·  last activity 3y ago by Olin Lathrop‭

Question current resistance dynamic-resistance photoresistor
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Q&A During a Li-ion cell charge or discharge at 1C rate, are the electrode interfaces at thermodynamic equilibrium?

Please, have a look at this thesis, from P. 12 to the end. The bottom line is that the Buttler-Volmer equation, which is in fact equation (13) derived in P. 12 to 16 (called by the author the elec...

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

Answer
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Q&A 2 bit subtractor using full subtractor

Can we make a n-bit subtractor using full subtractors or if we want do subtract one binary from another we must use full adders and use the complement of the 2nd number to do the subtraction? I ha...

1 answer  ·  posted 4y ago by MissMulan‭  ·  edited 2y ago by Lorenzo Donati‭

Question digital-logic arithmetic-circuit
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Q&A Can I make an AC inductor (reactor) rated 75mH 40A from a 3-phase induction motor?

For my test bench I need an inductor (aka "reactor") that meets the requirements below. I have tried to purchase it outright as a made-up item, or the parts to make it (core and windings), but have...

2 answers  ·  posted 1y ago by Fabio Barone‭  ·  last activity 1y ago by TonyStewart‭

Question inductor 3-phase reactance Induction-motor
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Meta How to request a mass-change in capitalization for tags?

In my effort to clean-up and organize tags on EE.CD I arrived at a point where there are a lot of old tags with wrong capitalization. How should I request the staff to change them? Should I post ...

3 answers  ·  posted 2y ago by Lorenzo Donati‭  ·  last activity 2y ago by Monica Cellio‭

Question support tags
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Q&A OP-AMP PT100 signal conditioner

How does this circuit work, especially considering that it's intended to be used as a PT100 conditioner?

1 answer  ·  posted 7mo ago by erisla‭  ·  last activity 7mo ago by Olin Lathrop‭

Question opamp RTD PT100
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Q&A Why did the battery blow out?

I have a bed for which the headrest can be adjusted. There are 2 separate power inputs for each side like in the picture: In addition, there is a set of 9V batteries on each side, presumably for...

2 answers  ·  posted 9mo ago by Elleanor Lopez‭  ·  last activity 9mo ago by absurdus‭

Question battery
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Q&A Signals and plane on the same layer

Hi, I’m working on a PCB layout, which is only about the second board I’ve ever designed. I’d appreciate some help with the following issue: This board has two layers: The top layer is used f...

3 answers  ·  posted 5mo ago by Eyal78‭  ·  last activity 4mo ago by TonyStewart‭

Question pcb-layout ground-plane
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Q&A Thick trace or a Polygon?

Suppose I use a wide trace as a power rail in my circuit (wide enough for the rated current, at a certain copper weight), and it doesn’t have an adjacent ground plane. If I have enough space on the...

1 answer  ·  posted 4mo ago by Eyal78‭  ·  edited 4mo ago by Eyal78‭

Question PCB pcb-layout
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Q&A Differential current signal to single-ended voltage conversion

I’m looking for circuits which convert differential current signal into single ended voltage. If found two topologies in application notes, and though of one more [obvious] topology myself. How d...

1 answer  ·  posted 5mo ago by misk94555‭  ·  last activity 5mo ago by Olin Lathrop‭

Question opamp
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Q&A Opto-coupler, slow turn off

I have an opto-coupler circuit where is very slow turn off. I can't figure out what is the cause of this problem. It's for UART isolation, with speed 9600 baud. Datasheet: EL357NC Do I have som...

2 answers  ·  posted 8mo ago by Juraj Lonc‭  ·  last activity 8mo ago by Juraj Lonc‭

Question opto-coupler uart
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Q&A Understanding induction motors

I have been watching this video and at 3:28 it says that a induction is inherently self-starting.Does this happen because of the energy stored and released in the windings of the statorFrom 3:41 u...

0 answers  ·  posted 2y ago by Volpina‭

Question 3-phase Induction-motor
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+3 −2
Q&A TIA Frequency Response

I am designing a TAI using this tool from Analog devices. The circuit diagram and it's frequency response obtained from the design tool is given below. Circuit Diagram: Frequency Response I ...

2 answers  ·  posted 22d ago by newbie‭  ·  edited 18d ago by Nick Alexeev‭

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

I always had trouble understanding the terms "digital" and "analog"; Wikipedia and various Q&A sessions didn't contain explanations I found clear. I understood that these terms aren't well defi...

3 answers  ·  posted 5y ago by deleted user  ·  last activity 4y ago by Nick Alexeev‭

Question terminology
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