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Q&A

General Q&A about the design and function of electronic systems, electric power systems and infrastructure, their theory, and tools specific to those fields. Read these guidelines before posting.

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28%
+0 −3
Current and voltage of inductor

How do I find the current through the inductor and the voltage of the inductor after the switch is closed?

2 answers  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by MissMulan‭

28%
+0 −3
Capacitance gain using conductive core for inductors [closed]

I have learnt that if we have 2 parallel conductive plates and we seperate them the capacitance is increased if we put a good conductor between the plates. Now the resonant frequency of a inductor...

0 answers  ·  posted 2y ago by MissMulan‭  ·  edited 9mo ago by Lorenzo Donati‭

28%
+0 −3
Find feedback of circuit

I have this circuit: I think that R3 acts like a feedback path from the output to the input.However I am not sure what will happen if I change the value from 100Ohms to lets say 1kOhms. I have ...

2 answers  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by LvW‭

28%
+0 −3
Phase shift between phase and line quantities [closed]

In a 3 phase Star source-Star load circuit the phase voltage has different phase than line voltage and in a 3 phase Delta source-Delta load circuit the phase current has different phase than the li...

0 answers  ·  posted 2y ago by MissMulan‭  ·  closed 2y ago by Olin Lathrop‭

28%
+0 −3
Electromagnetic induction

If I connect a battery to an LC tank and then to an antenna and then on the other side at a distance x, I connect an antenna to another LC tank and this to a diode and this to an LED, Do a I have a...

1 answer  ·  posted 2y ago by Voyager ll universe probe‭  ·  edited 9mo ago by Lorenzo Donati‭

28%
+0 −3
Design high -pass filter with 2 points of the bode plot

Im designing a high-pass filter which has a gain of -8dB at half of the roll-off frequency and I am stuck ,I dont know how to continue the design. In the bode plot of that filter we have 2 points:...

3 answers  ·  posted 2y ago by MissMulan‭  ·  last activity 1y ago by LvW‭

28%
+0 −3
Thermal stability coefficient [closed]

The thermal stability coefficient is defined to be: $S = \frac{dI_{C}}{dI_{CBO}}$ where $I_{CBO}$ is the reverse current of the BJT when voltage isnt applied to the base of the BJT. In case of a ...

0 answers  ·  posted 1y ago by MissMulan‭  ·  closed 9mo ago by Nick Alexeev‭

25%
+0 −4
Fuse monitoring on multiple batteries [closed]

Looking for KalleMP who last commented on the link attached. https://electronics.stackexchange.com/questions/368517/remotely-monitor-condition-of-fuse#:~:text=R1 %26 the LED are the basic indicato...

0 answers  ·  posted 9mo ago by Natti‭  ·  closed 9mo ago by Olin Lathrop‭

25%
+0 −4
Electric circuit with antenna

Moderator's note: This is getting ridiculous. You keep posting these drawings that are barely legible. The scribbling is bad enough, but the uncropped images are unacceptable. The image you ori...

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

25%
+1 −7
Identification of semiconducting electrical components

We identify semiconducting electrical components this way: The first digit represents the number of pn junctions inside the semiconducting device The two or more digit number starting at position...

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 9mo ago by Lorenzo Donati‭

25%
+0 −4
DC-DC converter using Hartley oscillator and transformer [closed]

Instead of using a buck or a boost converter can we use for DC-DC conversion the circuit Im going to describe in the next lines? First we begin with a Hartley oscillator whose output is fed into ...

0 answers  ·  posted 2y ago by MissMulan‭  ·  edited 9mo ago by Lorenzo Donati‭

22%
+0 −5
Why won't this Globe Electric Dimmable LED securely fit my IKEA November Lamp? [closed]

On the LEFT is what I just bought today — Globe Electric 4W (40W Equivalent) Daylight (5000K) Dimmable LED Light Bulb, G9 Bi-Pin Base, 400 Lumens, 15,000 H. Here's Globe Electric's Dimmer Compatibi...

0 answers  ·  posted 2y ago by TextKit‭  ·  closed 2y ago by Olin Lathrop‭

22%
+0 −5
BJT common emitter amplifier equivalent circuit (π hybrid model) [closed]

Im studying the equivalent model of a BJT common emitter amplifier at high frequencies.At university we tought that the BJT at high frequencies looks something like this: However when designing ...

0 answers  ·  posted 1y ago by MissMulan‭  ·  closed 1y ago by Olin Lathrop‭

22%
+0 −5
Designing a circuit to verify thevenin theorem with induction motor as load [closed]

Design a suitable experiment and an AC circuit to verify Thevenin's theorem when the load is a single-phase induction motor with a capacitive start and two supplies feed the load. Ratings of load:...

0 answers  ·  posted 1y ago by dkumar94600‭  ·  edited 9mo ago by Lorenzo Donati‭

22%
+0 −5
edison and tesla [closed]

what diffrence between tesla and edison? can anyone help me who come first?

0 answers  ·  posted 12mo ago by kEKIVI‭  ·  closed 12mo ago by Mithical‭

20%
+0 −6
Need help design a digital circuit which divides two binary numbers [closed]

Before the circuit here are the digital blocks which have been already designed and exist as part of the division block 1 bit subtractor: 2 bit subtractor(in the digital block diagram of the di...

0 answers  ·  posted 1y ago by MissMulan‭  ·  edited 9mo ago by Lorenzo Donati‭

20%
+0 −6
Electrolytic vs ceramic capacitors about self-resonance frequency

Which capacitors have smaller self resonance frequency?I would bet my money on electrolytic capacitors because they are usually much bigger than the ceramic capacitors however I don't know if they...

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 9mo ago by Lorenzo Donati‭

20%
+0 −6
Band pass filter given cutoff frequency and bandwidth

I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz. $$ \frac{1}{\sqrt{LC}} = 10001 \rightarrow LC = 1/100020001 sec^{2}$$ $$ \frac{R}{L} = 2...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 9mo ago by Lorenzo Donati‭

16%
+0 −8
HOW TO OPTIMIZE POWER USAGE FOR HOME [closed]

I HAVE A METER LIKE THIS BEHIND MY HOUSE MY NEIGBOR SLOWED IT DOWN SOMEHOW HE SAID HE OPENED IT UP AND DID SOMETHING TO IT NOW HE PAYS LOWER ELECTRICAL BILLS THAN ME BUT HE HAS COLLEGE DEGREE IN ...

0 answers  ·  posted 3y ago by ElectroRat‭  ·  edited 3y ago by Olin Lathrop‭