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I want to connect an ESP32 MCU near my garden gate, but I cannot run new wires. There is an existing 2-wire 24V DC Vimar 40945 entryphone unit, which carries both power and audio/video signals over ...
Luigi's user avatar
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1 answer
16 views

I don't know whether or not I connected the ground correctly. They are "separate" from the circuit, and the pins are not connected to any component.
dubeecsz's user avatar
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0 answers
16 views

I'm searching for a while for this smd.. any suggestions..? I would love to find it..
Thomas Klemet's user avatar
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1 answer
29 views

I am designing a Rail-to-Rail input operational amplifier for a specific project. I have encountered a bottleneck regarding the 3dB bandwidth and need advice on how to optimize the circuit given my ...
LACKHOLE's user avatar
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0 answers
30 views

This circuit I just copied, let me explain what I want in the circuit. IRE = Emitter and IRD= Photodiode /Phototransistor can be, now the problem is pin 6, output 2.30 volt continuous coming when no ...
Rashid Minhaj's user avatar
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2 answers
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I am reading about the resonant peaks in the RLC circuits. Stumbled upon this link. Below is the frequency response of a series RLC circuit, voltage measured across the capacitor. I just want to ...
Potionless's user avatar
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0 answers
44 views

I made a circuit in which there are 2 coils one connected to a push button and then the a dc power supply on the other coil there was a LED and a resistor. When I powered the circuit and pressed the ...
Harsh Kumar's user avatar
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1 answer
35 views

I am using an LM311 to compare a triangular waveform to an audio signal from an ESP32, and there is chatter at the output. I have tried adding hysteresis via a 330k Ohm resistor from the output to the ...
Kyle Owen's user avatar
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1 vote
3 answers
91 views

so last year my EE class had a lab where we built a treble booster. This was our schematic: (There’s circles around the capacitors but just ignore that) We modeled this on a breadboard. I have a ...
guiitar's user avatar
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0 answers
23 views

Can you help me to identify this diode ? Thank you
Maxime BOISDRON's user avatar
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34 views

How to draw the equivalent circuit model of wire wound resistor and inductor at high frequency It is a small one liner quiz question asked by the professor but i couldn't do it only thing know is RLG,...
Navjot Kaur's user avatar
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1 vote
1 answer
82 views

i found this schematic for op amp open loop how this is an open loop can anyone explain it to me? Most of the textbooks have the open loop without feedback then i am confused how this schematic is ...
Ashish Rimal's user avatar
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2 votes
3 answers
128 views

I am trying to simulate a 5th-order passive RC low-pass filter in LTspice. My requirements: Cutoff frequency: 500 kHz Input frequency range: 30 kHz – 500 kHz Signal amplitude: 1.5 V p-p Only R and C ...
Harshit Kumar Shakya's user avatar
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1 answer
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In the Fundamentals of Power Electronics book by Dragan Maksimović and Erickson, series and parallel resonant DC–DC converters are drawn as follows, respectively: The book states that in the series ...
MICHAEL MURITHI's user avatar
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1 vote
1 answer
60 views

I am designing a 3-phase BLDC ESC for a quadcopter drone powered by a 4S LiPo battery (VDD = 16.8V). My design uses an STM32F103C8T6 MCU, UCC27712QDRQ1 gate drivers, and AGM403AP N-channel MOSFETs. In ...
Robert's user avatar
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1 answer
51 views

I want to calculate how many joules 3 pulses per second lasting 0.5 seconds of 3000 watts in an electric motor would consume compared to a 3000 watt electric motor running continuously for 1 second, ...
Fulano's user avatar
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1 answer
59 views

Hello, I already asked a question about this circuit. Unfortunately, I still haven't been able to get AM modulation working with it. Although other circuits I've been shown work. I still want to find ...
Foma Loktionov's user avatar
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3 answers
255 views

I have a few questions about MIL-STD-1275 ("Characteristics of 28 Volt DC Input Power to Utilization Equipment in Military Vehicles"). Wouldn’t the combination of a TVS diode at the input ...
Bahattin's user avatar
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2 answers
452 views

I have recently started studying BJTs with an hands-on approach. I am trying to make a simple switch by working in the cut-off and saturation regions and, while the equations seem quite clear to me ...
Wandering's user avatar
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2 votes
1 answer
163 views

I’m working on a project where I need to prioritize 5 power sources, all providing 28 V DC. The switching between sources must be fast (<50 ms), and I was thinking of using the LTC4418 since it ...
Dykho's user avatar
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61 views

There is this movie trope where someone spills their coffee over their pc keyboard and the whole machine shuts down with permanent damage. On a laptop that isn't optimized for it this might seem ...
5-to-9's user avatar
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3 votes
5 answers
226 views

I’m trying to clearly understand the difference between cut-off frequency and resonant frequency in the context of LC circuits. When I look up the formulas, both frequencies seem to use the same ...
Potionless's user avatar
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0 votes
2 answers
76 views

I tried building an op-amp inverting amplifier in Multisim, but the signal in the output node is not inverted. Can anyone help me figure out what is the issue?
Franc Kaja's user avatar
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3 votes
2 answers
226 views

I'm building a resistive probe using four 10 megaohms resistors to measure the output of a high impedance (> 2Meg)/high voltage bias supply without loading it too much. The idea is that the jury-...
Joe's user avatar
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2 answers
84 views

I am making a forward converter and on the high side the voltage is 320 V. However I need to bias a gate driver that needs 17 V and needs to provide 1 amp to the MOSFETs. I am stuck in a situation ...
screws nat's user avatar
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-1 votes
1 answer
103 views

I have this fairy light which I want to understand better and redesign. The original strip accepted "12V-240V 50/60 HZ" input (as per its cover using the white 2-pin plug. I opened the box, ...
puio's user avatar
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-1 votes
0 answers
82 views

How could I describe an audio processing circuit fault to a circuit designer where the following symptoms occur: After a period of silence in the recording, the first segment of audio is missing/...
Dale's user avatar
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1 vote
2 answers
179 views

I want to learn how foldback current limiting works. I found this website : https://www.eeeguide.com/foldback-current-limiting-circuit/ Which has the following picture : And I tried to replicate it ...
cosmin's user avatar
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0 answers
48 views

For a university project, I am trying to design a system capable of locating uplink signals emitted by mobile phones. The Constraints: I need to scan different frequency bands corresponding to various ...
Jean-Baptiste's user avatar
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0 answers
67 views

So I'm working on making a variant of the 3 Phase Open Energy Monitor and a data logger based on the same. I aim to use something based on these to watch 3 phase spindles and servos on CNC machines to ...
Marc's user avatar
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0 votes
0 answers
94 views

I have a project where I need to qualitatively calculate the effect of renewable energy sources in a grid. Since the renewable sources are added in medium voltage (20kV) excess power provided is ...
Whiter Fox's user avatar
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1 vote
0 answers
112 views

I have this 2-pin crystal oscillator with possible marking "H1 3937", connected to two load capacitors. Can anyone help me find the frequency value of the oscillator? The adjacent U10 is an ...
Farah's user avatar
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-1 votes
1 answer
53 views

I’m having an issue with a server whose management port has burned out. This RJ45 port is a 12-pin MagJack (1G) I absolutely need it to access the management interface. I’ve desoldered the RJ45 ...
Desmo's user avatar
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0 votes
4 answers
121 views

What exactly is the definition of a high speed signal? Would you consider a signal of 1 MHz a high frequency signal? Or does it depend on the rise and fall time (the edges are what create harmonics)? ...
Gokul Karthik's user avatar
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3 votes
1 answer
322 views

I was asked to repair a Phywe laboratory voltage source that exhibited small, periodic oscillations of its output voltage. This unit is a very simple passive supply: an autotransformer feeding a heavy-...
Torquemada Magna's user avatar
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0 answers
26 views

I have mounted 4 mobile charger modules, which are switching power supplies, onto a single PCB. In my circuit, I’m also using an STM32 microcontroller, and I have enabled 4 ADC channels to read ...
Alireza ganjeh's user avatar
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1 vote
2 answers
88 views

Here is a circuit I made in LTspice based on an example in the Sedra/Smith book. I want to measure Rout and Rof (as shown in the Example's figure) if possible. How should I do this?
funnymonkey's user avatar
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0 votes
2 answers
101 views

This is a Tone audio generator. The 4046 generates a tone and TL074 controls its threshold audio. Please consider the LM393 schematic, its output is 0 or -5V. I want to connect the LM393 to this audio ...
HFAR's user avatar
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-1 votes
2 answers
74 views

I try to design SMPS converter with flyback converter topology. I can find right value of flyback transformer. For CCM, what is the equation for calculating primary and secondary number of turns & ...
B.MY's user avatar
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-1 votes
2 answers
122 views

From the MIDI Spec 1.0: I looked around briefly and cannot find this discussed at all. I remember when MIDI was first introduces in the 1980s. I understand the electrical specifications, the opto-...
robert bristow-johnson's user avatar
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3 votes
3 answers
478 views

newbie here trying to learn and create an electronics project for my uni (Comp E) My goal here is to create a DIY infrared sensor using photodiode and IR transmitter, and read the signal through a MCU ...
Pascalis Alvin Futari Ardi's user avatar
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0 votes
0 answers
59 views

I have a custom PCB with CP2102 but it seems like windows doesn't detect the CP2102. Here is the schematic and the PCB. I also measured the voltage of the pins: REGIN: 5 V VDD: 3.3 V VBUS: 5 V D+: 2....
spacesynth's user avatar
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0 votes
2 answers
79 views

I'm trying to make a 3.3V breadboard computer, and didn't find good DIP ROM/flash chips, so I decided to buy 2 Microchip SST39VF010-70-4C-NHEs, which are PLCC-32 chips, and a Chip Quik / Prototype ...
zale's user avatar
  • 103
6 votes
2 answers
529 views

I understand that in the near field of a loop antenna the magnetic field dominates, before it has formed a radiative propagating EM wave. Based on this, and the fact that magnetic fields can penetrate ...
Christian's user avatar
  • 325
2 votes
2 answers
135 views

What are the sources of noise for electricity in a power grid? Is noise picked picked up in transmission lines, transformer stations, or elsewhere, or is noise primarily do how the power is generated? ...
Geremia's user avatar
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0 votes
2 answers
101 views

Is the AC from a DC→AC inverter less noisy than the AC from the power grid? I'm wondering if residential solar energy is "cleaner" in the sense of less noisy than that from the power grid. ...
Geremia's user avatar
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1 vote
0 answers
65 views

When extracting the loop gain frequency of a nonlinear system: • What is a good way to ensure the disturbance injection sinusoid amplitude is small enough such that the response remains in a ...
ardarn's user avatar
  • 93
4 votes
3 answers
250 views

I have followed design guides online on how to create a low-side current sense circuit, for use with FOC to control a 3-phase BLDC. There is a differential input low-pass filter, common-mode filter, ...
Sung Hyun Eun's user avatar
  • 51
1 vote
2 answers
89 views

I'm planning to use a DPST rocker switch as follows: To be more explicit I want to use the switch as follows: Both wires to the DPST SW above will be line wires not neutral. The switch is from here ...
cm64's user avatar
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-1 votes
0 answers
50 views

My background is in optical engineering, and I have limited knowledge of electronics. I have a microscope that has an interlock for the eyepiece. There's a button on the microscope to toggle between ...
Omnistic's user avatar
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