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Proper DC supply vs batteries

For the current limiter circuit(using voltage regulator), proper DC supply matches the simulation results. However, when a battery of equal supply voltage is connected, the circuit goes haywire i.e. ...
Soham Ghaisas's user avatar
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0 answers
13 views

Clarification on Diode Recovery Times and Conduction State

I have a diode in my circuit with reverse voltage of 100V and forward voltage of 2V. It experiences a reverse voltage of 100V and immediately the voltage changes to 10V in forward direction so it ...
MohammadAli Zeraatkar's user avatar
0 votes
1 answer
18 views

Multimeter Range and Resolution

I'm confused as to how my multimeter takes reading, especially since its not autorange multimeter, i have to switch to the desired range to carry out measurements. Unfortunately, the resolution part ...
imran muhd's user avatar
0 votes
1 answer
16 views

AM-Receiver circuit, problems with saturation?

I have a questions about this specific circuit. I marked the potential-point I have "problems" with. I think there will be saturation in this point at some time. This point doesn't look to ...
javagreenhorn's user avatar
0 votes
2 answers
34 views

converting a 100V 900W AC electric kettle into 230V 1000W AC kettle

I bought this 100V 900W 50-60Hz AC kettle I really like in Japan, unaware that the power supply was different there than in my country (France, 230V 50Hz). I tried it once with an adaptor on my ...
MiKiDe's user avatar
  • 101
1 vote
0 answers
41 views

Is my basic coil gun schematic correctly wired?

Recently, I came up with the idea of integrating a coil gun into a marble machine to accelerate an iron marble. I've done a fair bit of research into other people's projects, and ended up mixing what ...
poxyping's user avatar
1 vote
0 answers
17 views

STM32IDE & DC Motor - Tracking Motor rotation

Is there a way for a microcontroller (STM32) to track DC motor rotation? Currently in class supposed to connect a DC motor of our choosing to a microcontroller, rotate it by 5 degrees and track the ...
ZombieSpale's user avatar
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0 answers
31 views

Trying to get an identification of an smd component marked only with an "A", on a receiver board

I need help identifying the component marked only with an "A" in the picture. I think it may be a fuse?
rusty's user avatar
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-2 votes
0 answers
22 views

What happens if two wires intersect [closed]

I'm pretty sure electric currents don't interact like this but if I were to make a NOT gate, with a wire, where one point is where current comes from and the other point be an output and the wire is ...
Nato's user avatar
  • 1
-2 votes
0 answers
16 views

Help needed Creating a truth table and a logic circuit using a statement given

i have gotten this question in my assignment, i'm quite confused about this and don't know where and how to start doing it, any help is appreciated
ACUA INTEGRA's user avatar
0 votes
0 answers
28 views

Help identifying the fuse used inside a Parkside 20V lithium-ion power tool battery

I blew the fuse inside my Parkside power tool 20 V 4 Ah battery and was wanting to fix it. There is a guy just soldering the broken circular fuse https://youtu.be/A6LYNa3-n90?t=171 but I want to do it ...
user357116's user avatar
0 votes
2 answers
27 views

AC and DC inputs to a Power Supply

I am studying about power supplies and I need some help with the following. I have a power supply with a 12 V DC output to power the lower power controller electronics. This power supply has two ...
power_electronics_engineer's user avatar
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0 answers
26 views

Closed Loop Control of BLDC Motor using STM32

I am working on 6-step commutation control of BLDC Motor. For this, I am using the values of Hall Sensors embedded inside the motor as feedback to determine the sector and find a switching sequence ...
Arslan's user avatar
  • 1
0 votes
1 answer
25 views

Using block diagram reduction rules, convert the block diagram to a simple loop and determine the transfer function

I don't know how how to reduce after the branch point next to H1 from which it is connected to 2 summation points.
Justice's user avatar
0 votes
0 answers
12 views

Android magnetometer calibration algorithm

I am trying to find the Android magnetometer calibration algorithm but everything is hidden. Is there any code is available for Android? Magnetometer calibration research paper. Android Document ...
Prithivi Raj's user avatar
1 vote
1 answer
40 views

Circuit analysis of a halfwave rectifier

I want to verify whether my calculations are correct. Additionally, there are two questions related to this circuit: 'What is the purpose of R1 and R2 in the given circuit?' and 'What is the intended ...
spinachpizza_'s user avatar
1 vote
2 answers
51 views

Practical example of controlled voltage and current sources

In text books some controlled or dependent voltage and current sources are shown. What are they really? Can someone explain them with real examples?
Alex's user avatar
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0 votes
0 answers
18 views

Ideal diode used with 2 batteries experiencing low voltage cutout

I have a mobility scooter that I upgraded the controller on. It is a 1800 watt controller. I am using two 48V 10ah Lithium batteries in parallel with 50 amp ideal diodes ( https://www.amazon.ca/Anti-...
KCK's user avatar
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0 votes
0 answers
25 views

How to connect cable shield when receiver side powers signal source?

I have element 'A', the receiver, connected to earth, which powers modules 'B' and 'C', the signal sources, unconnected to earth. 'B' sends a differential line signal, and 'C' sends an analog signal. ...
Tommy95's user avatar
0 votes
0 answers
37 views

Need an alarm circuit patent NZ 739314 using Parasitic oscillation

I am the owner/inventor patent of NZ738314 which produces a parasitic oscillation. This oscillation is controlled by the resonance of an object. The resonance can be related to composition,liquid ...
Warddavi's user avatar
1 vote
1 answer
18 views

For DDR4 and DDR5, is tCCD_l timing to be obeyed for accesses in a single row as well?

So I have been trying to learn about DDR4 and DDR5 memories, and it seems that the Column-to-Column delay values (in clock cycles) are different depending on whether consecutive accesses are inter-...
Kraken's user avatar
  • 325
0 votes
2 answers
29 views

Replace One Centre-Tapped Resistor with Two Resistors

I have just started research and design on a small guitar tube amp and have hit the first of what is probably many uncertainties. The idea is to reuse the transformers, 7C5 power tube and 7Y4 ...
slubtle's user avatar
0 votes
4 answers
60 views

Single stage MOSFET Amplifier with terrible gain

I'm designing a single stage MOSFET amp for use with a 10k ohm load (R3) and I'm getting abysmal gain. How should I change the values of my biasing resistors?
Jack's user avatar
  • 21
1 vote
2 answers
33 views

How to Drive a 50uA Panel Meter with a PLC Running 24v Inverted PWM Signal

Full disclosure, I am not an engineer of any kind. Just an electronics enthusiast. I have a Barth 850 micro PLC that needs to operate at 24v, and has one PWM output. I also have a 50uA panel meter ...
Joe Schmo's user avatar
1 vote
0 answers
15 views

How to place decoupling capacitor in esp32 developer kit v1?

I am using esp32 fill the bottle based on user input quantity. I have to on/off pump 12v 4amp and I have to control flow sensor. I facing issues in flow sensor reading while pump on. The electric ...
Hari .S's user avatar
  • 11
0 votes
0 answers
25 views

How to make a recent laptop touchpad work on PC with an external PS/2 USB adapter

I want to make a laptop touchpad work individually with an USB adapter, but failed on a recent Thinkpad T470 touchpad part. Some articles on the internet said they succeeded connecting the touchpad ...
sdrkyj's user avatar
  • 1
-3 votes
0 answers
14 views

From the image below Provide the nodal equations for the circuit. Solve for the nodal voltage V1. The node connected to R1What is the nodal voltage V2 [closed]

From the image below Provide the nodal equations for the circuit. Solve for the nodal voltage V1. The node connected to R1.What is the nodal voltage V2. This is the node between R2, R3, R4, and the ...
Olamirewaju Ibisola's user avatar
0 votes
1 answer
27 views

How to Get Started with Triacs

I'm interested in building a solid state relay module at home using a triac. I know the safety risks associated with this project. I'm also aware of the cheap SSR modules capable of the same things. ...
supermitchell2's user avatar
4 votes
0 answers
32 views

Attempting to patch the "G75 Bug" on a Gerber Level

Context I am currently looking for alternative PCB manufacturers for my company and have sent Gerber files to some (Chinese) companies. These Gerber files have already been used in the past by various ...
Sim Son's user avatar
  • 2,713
0 votes
1 answer
28 views

What is a solution to handle multiple same capacity lipo cells in parallel?

It seems that BMS's are for batteries in series... If I have 3 x 1200mAh lipo cells to get pretty much a large 3600mAh 1S pack... I believe I know that I can't just parallel wire single-cell BMS's ...
Jacob David C. Cunningham's user avatar
0 votes
2 answers
45 views

Calculation of equivalent resistance

I need to calculate the equivalent resistor between knots A and B to then use it in Thevenin Generator; it says the result should be (R // Zl) + (R // R) however I don't quite get why that's the case.
khaled baccour's user avatar
0 votes
2 answers
39 views

Improving MOSFET switching timings (push-pull)

Based on my previous question here, as suggested I'm using a push-pull driver circuit to control a MOSFET gate. this is the circuit: And this is a simulation result: Vertical Divisions are 1 V, ...
Bikay's user avatar
  • 37
0 votes
0 answers
30 views

How do you find the RTH of this?

I suddenly got confused while practice solving using Thevenin method.
New student's user avatar
1 vote
0 answers
17 views

Impact of laser current source noise on RIN (relative intensity noise)

I am trying to specify the noise requirements for a constant-current source that would drive a diode laser with a certain relative intensity noise PSD. Lasers typically behave as forward-biased ...
chrisp's user avatar
  • 11
0 votes
1 answer
43 views

Increasing basic charge pump's output current

I am trying to increase the output current of this charge pump circuit but I am out of ideas Once C1 (10mF) is charged up to roughly 3V the mosfet will open up at random intervals for 400ms thus ...
crispus's user avatar
  • 35
0 votes
1 answer
40 views

What might cause a sudden voltage drop in an airborne drone's battery? [closed]

DJI Mavic 2 Zoom Enterprise Drone We lost connectivity between our handheld controller and drone while flying a drone photogrammetry mission. Photogrammetry missions allow you to pre-program a flight ...
Neil Wakeman's user avatar
0 votes
1 answer
73 views

Arduino's impedance in breadboard circuit

(Warning, as this is a long question, asked by students that don't know what they're doing. Perhaps our questions are too general and can't be answered but at this point we'll take all the help we can ...
Emmannuelle Mercier's user avatar
1 vote
1 answer
46 views

MOSFET ring oscillator LT SPICE

I am designing a ring oscillator using MOSFETS to create the inverters however, I am encountering problems with the output. I feel like the ring oscillator project should be very simple and yet I can'...
spiderman19's user avatar
0 votes
1 answer
49 views

CR2477 battery peak pulse [closed]

Do you think CR2477 battery can handle 12mA pulse current for 3-4 seconds hourly. How long do you think the battery will last?
DanielZhao's user avatar
0 votes
2 answers
31 views

Do we need CC1 resistors on USB C, embedded MCU circuit?

Do I need cc1 and cc2 resistors just for charging the battery? My embedded board doesn't need standard data transfer. I have on the board a USB type C connector for PC USB to TTL converter, a baud ...
Haim Rodrik's user avatar
0 votes
0 answers
31 views

Total Consumption Calculation for Multiple electric ovens

Regarding NEC Table 220.55, if I have 4 ovens at 9 kW each, since they do not exceed 12 kW, I should refer to column C. However, my question is: Is it correct to consider 17 kW as the total ...
Julián Oviedo's user avatar
1 vote
1 answer
33 views

Connecting bi-directional single-phase motors in parallel

I have an application that uses a 220 V AC 50 Hz motor. The motor has two live connections and a neutral. Connecting the different live connections will reverse the direction and you can have the ...
Clinton Brits's user avatar
2 votes
2 answers
171 views

How can prevent the source voltage from dropping when using a 555 timer

I am trying to use a 555 timer in my circuit to produce a signal (rather generally) above 100kHz. I have been successful with this goal, but have had an issue where the voltage measured on my positive ...
Alex Heinle's user avatar
1 vote
1 answer
33 views

Is my PFET Orientation Correct for Reverse Voltage Protection?

Do I have the P MOSFET orientation in the attached circuit correct?
Barry Jensen's user avatar
0 votes
0 answers
29 views

Using both safety PLC and safety relay

I am in the process of designing a robotic cell. This contains a safety door and several e-stops. I want to use the safety PLC from siemens S7-1200F. I need to have two roller tracks with 8 24V motors ...
user357063's user avatar
0 votes
0 answers
25 views

Wi-Fi Router Charger: is 100-240V input an acceptable replacement for a 220-240V charger? [duplicate]

My wi-fi router charger is broken and I'm looking to buy a replacement. The old one says - input 220-240V 50/60Hz 0.5A, output 12V 2.5A, efficiency level V Online, the closest I found has input 100-...
Alex Cătălin's user avatar
0 votes
0 answers
31 views

Ping not work on STM32H745 ETH

I'm trying to get the ethernet interface to work on an STM32H745. After fixing various hardware problems, now I don't just have software problems. I created a simple project with CubeMX, basically I ...
Federico Massimi's user avatar
0 votes
0 answers
12 views

Error when mixing mixed functions in vitis HLS

I have the below code in vitis hls, the STREAM is powered by the AXI interface ports that are supplied to the function. ...
Juan Antonio Rodríguez Gracia's user avatar
3 votes
3 answers
239 views

What do these 2 NOR gates do in this wind turbine charge controller?

I have the schematic for a wind turbine charge controller from here. What is the purpose of the two interconnected NOR gates in the middle of the schematic?
user357057's user avatar
-2 votes
1 answer
43 views

Breville 800ESXL [closed]

This coffee machine is specified as using 110 or 220 volts but always at 60Hz. Will it work at 50Hz? I cannot see any issue except for the pressure pump not reaching its maximum speed.
Jorge's user avatar
  • 1

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