Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Posts tagged component

Synonyms: components electrical-component electrical-components electronic-component electronic-components

10 child tags

Anything related to electrical or electronic components, i.e. the basic building blocks of electrical systems and electronic circuits.

This tag is for questions about components in general. Please, don't use this tag for questions about specific components if a more specific tag is available. Use this latter instead.

This tag doesn't have a detailed wiki yet.

60%
+1 −0
Q&A MOSFET drain current ringing in saturation region

I benchtested below 0.7A constant current source circuit and observed few cycles of oscillation on drain current. With the help of bode plot analysis , I have managed to reduce the oscillations on ...

2 answers  ·  posted 9d ago by kadamrohan16‭  ·  last activity 8d ago by Olin Lathrop‭

66%
+2 −0
Q&A Matched transistors

There are circuits that require matched transistors. Whether BJTs or FETs. Like current mirrors, logarithmic amplifiers, etc.. There are some examples: https://www.youtube.com/watch?v=DUlugLSroN8...

1 answer  ·  posted 13d ago by Chupacabras‭  ·  last activity 13d ago by Andy aka‭

Question transistor
75%
+4 −0
Q&A High voltage transformer design

Suppose I have a planar PCB transformer. The primary and secondary coils are printed on different PCBs. The core is inserted through these PCBs to link the two coils. The primary is at a low voltag...

2 answers  ·  posted 2mo ago by jonathan_the_seagull‭  ·  last activity 2mo ago by Andy aka‭

Question transformer IPC
71%
+3 −0
Q&A Transformer design for a Series Resonant Converter

I am determining the Area-Product of the core required for a transformer to be used within a series resonant converter. The specifications are as follows: Switching frequency = 400 kHz Primary ...

1 answer  ·  posted 3mo ago by jonathan_the_seagull‭  ·  last activity 3mo ago by Andy aka‭

Question transformer
57%
+2 −1
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 5mo ago by Fabio Barone‭  ·  last activity 3mo ago by TonyStewart‭

77%
+5 −0
Q&A Ceramic capacitor "memory" effect?

I have run into an interesting phenomenon related to ceramic capacitors. This question is part of the effort to understand the issue, and eventually work around it. But first, some background of ...

2 answers  ·  posted 4mo ago by Olin Lathrop‭  ·  last activity 4mo ago by TonyStewart‭

Question capacitor
71%
+3 −0
Q&A What fabrication process is being used for jellybean parts

I want to know why the top-of-the-line CPUs and GPUs from Intel, NVIDIA, and AMD are all bragging about the fabrication process (7nm and 5nm) and trying to be consistently smaller. At the same tim...

3 answers  ·  posted 4mo ago by dekker‭  ·  last activity 4mo ago by TonyStewart‭

60%
+1 −0
Q&A derating MLCC ripple current for transient current spikes

This graph - MLCC temperature rise vs ripple current RMS & frequency If I had a 10 us current spike every 100 000 us (akin to a half-sine wave and then the rest of 9999 sine waves missing), ...

2 answers  ·  posted 6mo ago by kellogs‭  ·  last activity 5mo ago by TonyStewart‭

71%
+3 −0
Q&A Burned Source Driver - Noise Spikes from Relay Coil

I am trying to figure out what is causing an Allegro A2982 source driver to burn up. The source driver (A2982) is connected to the coil of a Panasonic TXS2-9V relay. The source driver and coil ar...

1 answer  ·  posted 6mo ago by mrbean‭  ·  last activity 6mo ago by Olin Lathrop‭

Question relay source-driver
77%
+5 −0
Q&A Soft-start circuit behaviour

Let's take a soft-start circuit that looks like this: To my understanding, the function can be described as follows: C1 charges to open the gate. Value of C1 will dictate the soft-start delay...

1 answer  ·  posted 7mo ago by Mu3‭  ·  last activity 6mo ago by Olin Lathrop‭

Question MOSFET DC
75%
+4 −0
Q&A Power switches and automotive load dump, unclamped

Power switches used in automotive are usually rated to withstand clamped load dump events, of the 35 - 40 V peak variety. AFAICT there are two main clamping mechanisms - first one for the logic par...

2 answers  ·  posted 7mo ago by kellogs‭  ·  last activity 7mo ago by TonyStewart‭

28%
+0 −3
Q&A 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 7mo ago by Lorenzo Donati‭

33%
+0 −2
Q&A How to calculate the voltage of a coil?

Hi guys, I need to calculate the voltage that will center the magnetic field of a coil. The coil gonna be used in an induction heater thank you. Edit: I edited the paragraph because it was misu...

3 answers  ·  posted 1y ago by deleted user  ·  edited 7mo ago by Lorenzo Donati‭

71%
+3 −0
Q&A Case temperature of MOSFET

Homework problem A MOSFET has a power dissipation of $P_{d} = 10\text{W}$. The MOSFET is mounted on a heatsink. There is an isolation pad between the MOSFET case and the heatsink. We are given t...

1 answer  ·  posted 2y ago by Carl‭  ·  edited 7mo ago by Lorenzo Donati‭

62%
+3 −1
Q&A Power amplifier for remote controller

I'm designing remote controller based on NRF24L01 and STM32. I want to use SMA antenna. My question is regarding power amplifier (PA). When is it necessary to use one? The range I'm aiming for is 2...

3 answers  ·  posted 1y ago by Stefan‭  ·  edited 7mo ago by Lorenzo Donati‭

60%
+1 −0
Q&A Current Flow in the OFF Time of a Switching Power Supply

I am having a difficult time picturing the flow of current and the role of the capacitor during the OFF time of a buck converter. Here is my understanding so far. During the ON time the magnetic fi...

1 answer  ·  posted 3y ago by jm567‭  ·  edited 7mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A Contactor control - Higher voltage PWM

I have a battery pack that consists of 18650 battery cells(14 cells in series max.). Hence, the voltage of the battery pack will be between 35V and 60V(to be on the safe side) I am designing a BMS...

2 answers  ·  posted 3y ago by 2kind‭  ·  edited 7mo ago by Lorenzo Donati‭

71%
+3 −0
Q&A Flyback transformer for Vout > Vin

This question is asked in an addition to https://electrical.codidact.com/posts/276436 Here is a Flyback converter mentioned there: Design parameters are: Input voltage 125 volts Output volt...

2 answers  ·  posted 2y ago by 2kind‭  ·  edited 7mo ago by Lorenzo Donati‭

42%
+1 −2
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 2y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭

42%
+1 −2
Q&A Series RLC circuit

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

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭

44%
+2 −3
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 2y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭

80%
+6 −0
Q&A What is this fourth connection in NMOS device?

I know that in transistors there is base, collector and emitter, and in FETs there is gate, drain and source, but what is the fourth grounded connection opposite the gate in this NMOS circuit?

1 answer  ·  posted 2y ago by NMOS lover‭  ·  edited 7mo ago by Lorenzo Donati‭

Question MOSFET
75%
+4 −0
Q&A Battery protection circuit

I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to imple...

2 answers  ·  posted 1y ago by Stefan‭  ·  edited 7mo ago by Lorenzo Donati‭

50%
+2 −2
57%
+2 −1
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 3y ago by 2kind‭  ·  edited 7mo ago by Lorenzo Donati‭

70%
+5 −1
Q&A How Relay inrush current limiter works?

In this circuit below the relay circuit part is acting as an inrush current limiter, but I can't understand how it works since the current is flowing in both conditions where the relay is open or c...

1 answer  ·  posted 1y ago by deleted user  ·  edited 7mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A How to change the polarity of an input using a single switch?

I have an mcu pin and I want to sense a voltage up to 24V to 36V. I want to connect some outputs on the board I'm designing and I don't know whether those outputs will provide a voltage or will be...

1 answer  ·  posted 9mo ago by DeadMouse‭  ·  edited 7mo ago by Lorenzo Donati‭

Question microcontroller BJT
66%
+2 −0
Q&A Diode like a frequency mixer

Based on this paper on Wiki a diode can be described as a frequency mixer due to the exponential relationship between current and voltage.What I don't get from which point to which point do we meas...

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A Diodes used in mixers

Suppose we have this circuit which is supposed to be an unbalanced frequency mixer. But how does the diode generate a signal with new frequencies at the output?

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭

50%
+0 −0
Q&A How do "O-ring circuit" differ from an "ORing circuit" or "OR-ing circuit", or are they synonyms? [closed]

I've seen a few different circuits (a) (b) (c) (d) described as "an O-ring circuit" or "an optimal O-ring circuit". What does the "O" and the "ring" refer to in such circuits? How do "O-ring circ...

0 answers  ·  posted 2y ago by DavidCary‭  ·  edited 7mo ago by Lorenzo Donati‭

25%
+1 −7
Q&A 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 7mo ago by Lorenzo Donati‭

60%
+1 −0
Q&A Adding resistance to varactor circuit

If we a varactor and we want to control let's say the resonant frequency of the circuit ,in my schematic we must add R1 correct?Else we create a low resistance path for current to flow not through ...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭

77%
+5 −0
Q&A What should be considered when picking a flyback diode?

Which are the parameters I should looking for when picking a flyback diode to be placed across a generic coil, such as a relay? That is: a coil with plain on/off functionality, for example a 24VDC ...

2 answers  ·  posted 3y ago by Lundin‭  ·  edited 7mo ago by Lorenzo Donati‭

77%
+5 −0
Q&A Is it possible to use two zener diodes in series back to back to replace a diac?

I've accidentally burnt my dimmer with a short. It is a common dimmer with a triac/diac/pot of the simplest configuration (the triac is a BTA16). After replacing the triac, this still does not work...

2 answers  ·  posted 3y ago by coquelicot‭  ·  edited 7mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A How do I calculate and manipulate the inductance and capacitance of outputs to a connector on a PCB?

I am designing a PCB that has to have class 1 div 1 associated apparatus (only the outputs to the sensor) certification. Essentially, I am using a boost converter to convert the voltage from a lith...

2 answers  ·  posted 3y ago by Hawk2020‭  ·  edited 7mo ago by Lorenzo Donati‭

75%
+4 −0
Q&A Chokes, Beads and Inductors in Pi-filters

I have seen pi-filters using chokes, ferrite-beads, and plain inductors as the L-element What are the main differences between them? when use one or other?

1 answer  ·  posted 3y ago by zeke‭  ·  edited 7mo ago by Lorenzo Donati‭

75%
+4 −0
Q&A Is a BJT 3-transistor Wilson mirror faster than a simple mirror?

My question is trying to understand if there is an effect on the switching time, on both turn-on and turn-off, between the following configurations. A mirror set up to switch a current, and there ...

1 answer  ·  posted 3y ago by Pete W‭  ·  edited 7mo ago by Lorenzo Donati‭

57%
+2 −1
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 3y ago by coquelicot‭  ·  edited 7mo ago by Lorenzo Donati‭

71%
+3 −0
Q&A Thévenins Theorem for Transistor Circuit

I am calculating the base current of transistor Q1. To simplify the circuit equations, I applied the Thévenin's theorem twice and converted V1, R1 and R2 into Vth and Rth, as shown in the image. ...

2 answers  ·  posted 2y ago by kadamrohan16‭  ·  edited 7mo ago by Lorenzo Donati‭

83%
+8 −0
Q&A Technique to reset pulse transformer core quickly

I am analysing a pulse transformer which is required to transfer below communication protocol pulse from primary to the secondary side. The pulse duration is 32 μs and off time available to reset t...

2 answers  ·  posted 1y ago by kadamrohan16‭  ·  edited 7mo ago by Lorenzo Donati‭

77%
+5 −0
Q&A PNP Darlington pair as a current limiter

I am trying to analyse what is controlling the load current in the below Darlington configuration. Is it the base current of transistor Q3 which is controlling current through R14 / emitter curr...

1 answer  ·  posted 2y ago by kadamrohan16‭  ·  edited 7mo ago by Lorenzo Donati‭

71%
+3 −0
71%
+3 −0
Q&A Purpose of emitter resistor in a common collector amplifier

I see a lot of common collector amplifiers with the output taken across an emitter resistor. What is the purpose of doing it this way instead of connecting your load directly to the emitter? I sh...

4 answers  ·  posted 3y ago by jm567‭  ·  edited 7mo ago by Lorenzo Donati‭

33%
+1 −4
Q&A Floating circuitry and diodes

In both cases, is the "X" point floating when there is no 12V applied ?

1 answer  ·  posted 9mo ago by kellogs‭  ·  edited 7mo ago by Lorenzo Donati‭

50%
+0 −0
Q&A Modelling tunnel diode relaxation oscillator

I have been trying to model this oscillator I was wondering if we can somehow predict the frequency of the oscillations.For small currents inside a diode from the Shockley diode equation $$ e^{x...

1 answer  ·  posted 1y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭

50%
+0 −0
Q&A Tunnel current equation

The current through the tunnel diode is: where $I_{f}$ is the current from the Shockley diode equation and $I_{tunnel}$ is the tunnel current. Is there an expression for the tunnel current or i...

0 answers  ·  posted 2y ago by MissMulan‭  ·  edited 7mo ago by Lorenzo Donati‭