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battery voltage profile

Can you help me analyze my battery voltage profile? Analyzed data from a sample experimented with the same conditions. The graphs have completely different shapes, as shown on the left, how should I ...
lilya.Rey's user avatar
0 votes
1 answer
13 views

How to improve mosfet switching timing?

I am a hobbyist and I am not a native so bear with me please. I was looking for a fast mosfet and by looking at some datasheets I noticed that switching time is not a constant parameter like this one: ...
Tintin's user avatar
  • 45
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0 answers
18 views

How does CAN transceivers output CANH=3.5V and CANL=1.5V?

This is a questions that has been asked but did not find a clear answer. How it is the 3.5V achieved on CAN_H? Assuming there is 0.5V voltage drop on the internal diode, 0.1V on the internal MOSFET ...
Florin Adrian's user avatar
0 votes
2 answers
38 views

LM324n amplification during voltage follow

I've built simple Low-pass filter and voltage follower using LM324N amplifier. Upon my understanding, the voltage follower should not amplify the voltage, due to its gain=1. But it seriously shifts ...
GL Park's user avatar
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0 answers
11 views

Motor details - lead lugs and other items

I'm trying to evaluate a replacement motor using limited data from the existing motor. The vendor provided a motor datasheet, which includes some "special features", but the lines run ...
martij7's user avatar
  • 13
0 votes
2 answers
27 views

A tag on my Asea motor says 415V-Y 240V-🔺

What does the triangle represent?
Thomas Koorneef's user avatar
0 votes
1 answer
22 views

Power Supply for a wide range voltmeter

I'm trying to make a 3 digit AC voltmeter that could display the voltage it draws it's power from. It should be able de measure voltage from 50Vca to 500Vca or so and should mostly be used at around ...
Shynord's user avatar
0 votes
1 answer
32 views

How do phosphorescent panels compare to LEDs for whole of night low level lightinhg

Modern phosphorescent materials are used for applications like emergency exit signs and evacuation markers. I'm wondering if the best of these may be acceptable for low level all night low level ...
Russell McMahon's user avatar
  • 151k
-2 votes
0 answers
32 views

Can someone help me have a better idea of the wiring of the switches? [closed]

My wiring diagram, which I am having a hard time understanding how should I do the wiring for the switches that control the motor and the linear actuator I am using.
Kaua Rafacho's user avatar
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0 answers
11 views

Vivado: How to setup clocks according to constraint file?

I am beginning to experiment with an Arty A7 development board and I am fighting Vivado. According to the constraint files given for the board, I have the following ...
milck's user avatar
  • 101
-1 votes
1 answer
32 views

What would happen if I connect a AC input to a DC-DC flyback converter without any rectifier? [closed]

I have a DC-DC flyback which has a 47uF, 450V bypass capacitor at the input. What would happen if I connect a 220 V AC supply at the input instead of DC? Will the bypass capacitor blow off, or will I ...
moony's user avatar
  • 1
1 vote
2 answers
43 views

IR pulse sensor : signal stops after a few pulses

I'm trying to make a pulse sensor based on this tutorial: https://makezine.com/projects/ir-pulse-sensor/. I therefore reproduced this diagram by replacing the LM354s with MCP6002s and without ...
Sumnayono's user avatar
0 votes
2 answers
43 views

Where do I need give my inputs to this three stage master slave flip flop?

In his paper on TSPC logic, professor Razavi talks about use of the following topology as a master slave flip flop However, I don't know where to give input to this circuit while trying to simulate ...
Koustubh Jain's user avatar
0 votes
0 answers
12 views

Ripple Detector with Timer for Alarm Activation

I have designed a ripple detector circuit that monitors ripple voltages and detects when the peak-to-peak ripple voltage exceeds 30mV. The final stage of this circuit is a comparator, which outputs a ...
Farzaneh's user avatar
  • 159
1 vote
1 answer
66 views

The LED that is series with relay is destroyed after a couple of activations

I've tried to make a bidirectional relay circuit with a pair of relays that work with 24 volts. I tested the circuit and it works fine and both LEDs turn on when the relay is activated. After a ...
hrsk2002's user avatar
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0 answers
38 views

Why does photodiode junction capacitance affect operating bandwidth? (from a semiconductor physics model perspective)

Here is a typical equivalent circuit diagram of a photodiode. I feel like this circuit model broadly makes sense to me. You have a diode, in parallel with the junction capacitance. The photocurrent ...
genericpurpleturtle's user avatar
-2 votes
0 answers
22 views

ADP5304 - circuit schematics on the datasheet not working [closed]

I've implemented the ADP5304, marking "LT9 #IT" in one of my PCB designs however it is not working as intended. Can anyone assist me on this one? below is a snapshot of the circuit ...
Miguel Tomás's user avatar
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0 answers
19 views

Forward Voltage diode for a fixed current and different temperatures

I should measure forward voltages of a diode for different temperatures and a fixed current. I have a Keithley 2602A. Should I do a current source circuit?
SirU's user avatar
  • 23
-1 votes
0 answers
13 views

Can't find RX-28 TXM ZYT11FQ data sheets

Im adapting an RC car and remodeling it but I can't find the data sheets for this IC RX-28 TXM ZYT11FQ. Foto of IC in circuit:
Unix's user avatar
  • 1
0 votes
0 answers
14 views

I'm making a PCM modulator and demodulator that uses Amplitude Shift Keying, Phase Shift Keying, or Frequency Shift Keying

I used a PCM modulator ADC and then the 8 bit data that will be converted into a serial data using a 74HC166D 8 bit PI-SO shift register. and then connect the serial out to a ASK, PSK, or FSK ...
AJv's user avatar
  • 1
0 votes
2 answers
67 views

Why isn't distortion much of a concern in RF amplifiers?

Class C and class E power amplifiers both distort the waveform yet they are preferred in RF applications. Why?
Ritam Sarkar's user avatar
0 votes
0 answers
45 views

CAN bus accidentally swapped TX and RX is it possible to solve (in firmware) without board rework

I am interfacing an isolated can transceiver with my microcontroller.My schematic is given below. Accidently TXD is connected to RXD of microcontroller and RXD is connected to TXD of the ...
Confused's user avatar
  • 2,326
0 votes
0 answers
11 views

Low Power Wireless Communication ATTINY/Arduino

I am a very beginner and I am trying to do a little project using Arduino. Then switched to ATTINY85 (honestly no reason, just for understanding). The project is nothing. 2 modules. client and server. ...
Sandeep Thomas's user avatar
0 votes
0 answers
9 views

Why is there back current from DRV8833 when using PWM in slow decay (braking)?

I setup a circuit to drive a small DC motor and noticed a 0.3V signal on the power rail. The signal has the same 60Hz cycle as the PWM signal. VM is 5V and I am using a slow decay (braking) PWM signal ...
BB_Coder's user avatar
0 votes
0 answers
17 views

Is this LTSpice simulation of arduino's command for relay corrrect?

Here is a LTspice simulation for based on the video Design Relay module PCB using Altium designer To me, it seems ok, but i am lacking of experiences. What is your opinion on this LTSpice simulation ...
alvaro562003's user avatar
0 votes
0 answers
14 views

can a soft starter be used if the application requires high starting torque?

I want to use soft starter to protect the motor from high starting torque because the motor is set to start via DOL quite frequently. But wondering whether the application requires high starting ...
Udit Nambiar's user avatar
0 votes
0 answers
22 views

Electric grill gives heat until it is switched off; thereafter 30 or so minutes need to pass before it gives heat again

We have a Morphy Richards contact grill that has worked fine for years but for the past few months it does this: You turn it on, it gives heat fine. Once you switch it off (it doesn't matter how much ...
gtz's user avatar
  • 1
2 votes
2 answers
85 views

IGBTs fail after high current, high voltage switch, despite being lower than absolute maximums mentioned in datasheet

I'm using FGH60N60 IGBT as a switch. The circuit is basically a capacitor-discharging circuit. I have a 10 mF capacitor charged to 310 volts and connected to 2 Ω of load via this IGBT (I connect 4 ...
pouya nosratkhah's user avatar
0 votes
0 answers
12 views

Blank MCB triggers the RCD?

This is not a question about how to fix a problem (that part is simple enough and perhaps better left to a professional), but I'd like to understand what is going on. I have an MCB in my consumer unit,...
j4nd3r53n's user avatar
  • 103
0 votes
0 answers
18 views

Current sensing in DC-DC converter

I studied DC-DC converter in peak/valley/average mode control and I have a question about the methodology to sense the current in average current mode control. I saw lot of paper about DCR sensing but ...
AnalogMan's user avatar
  • 324
-2 votes
2 answers
69 views

How to build an oscillator that can generate 5 to 6 volts square wave at a frequency of 3.5 MHz? [closed]

Also how can I vary the frequency for such an oscillator ...?
Ritam Sarkar's user avatar
0 votes
0 answers
46 views

Beginner question regarding voltage divider for microcontroller

I am a beginner concerning electronics and would love to learn something new. I have an Arduino Nano and would like to calculate an encoder's speed. The encoder is built in into a system which ...
homecockpits's user avatar
3 votes
1 answer
66 views

Band Pass Filter Design Simulation

I'm trying to simulate a bandpass filter in ltspice. bandpass filter should be in the 2-5 Hz frequency range I calculated the capacitor and resistor value for this range. However, the simulation ...
AEY's user avatar
  • 31
0 votes
0 answers
20 views

How to make a code syntesis faster whenever there is nested for loop inside with system verilog?

i want the code below to be synthétisable in a reasonable among of time, i expect that it takes so much time because there is a lot of for loop inside, i want to know what i can work on to improve the ...
fabrice's user avatar
  • 25
0 votes
0 answers
16 views

How Impinj speedway r420 switch the antennas

I'd like to use Impinj Speedway r420 for localization of tags with multiple antenna. To realize this, I want to know how the reader switch their antennas, such as the duration of switching, and the ...
山口諒's user avatar
0 votes
0 answers
60 views

is it possible disable or bypass 50Hz frequency limiter on a coffee machine

I am sorry if it's not the wrong section. I'm not a tech or engineer by any mean I have been buying siemens coffee machines for the last few years despite being 220V/50hz just by using a step up ...
Anis's user avatar
  • 1
0 votes
0 answers
27 views

Using a direct signal to open/close a gate

I have a LiftMaster gate opener, to which I would like to add something like a Raspberry Pi so that I can control it from my phone over the internet. The manual for my gate opener (p. 51) shows a ...
shay's user avatar
  • 1
0 votes
0 answers
37 views

Getting PSSI to work via Rust on STM32

This will be more of a wider scoped question, as there is a lot that I am trying to understand here. Context: I am attempting to communicate with the 16bit-parallel data interface of a MAX11046 ADC ...
BlueOyster's user avatar
0 votes
0 answers
76 views

Triggering a small black powder charge with an STM32

I am trying to design a flight controller system that can trigger some small low-power explosive charges as described here. The description states that the charges will ignite with as little as 2V at ...
Jark's user avatar
  • 1
2 votes
2 answers
420 views

Resistance Vs Reactance Definition

I am trying to understand the practical distinction between resistance and reactance. As I understand from all what I read the resistance is responsible for the current flow and the reactance is ...
DarkKnight's user avatar
1 vote
0 answers
61 views

DC-DC(Buck) shuts down when LDO enabled (intermitent)

I've encountered a problem on SOME of the boards in pre-production batch, when the boards main 5V rail generated by a buck dc-dc converter shuts down at the moment when one of the loads generated by ...
MMG's user avatar
  • 11
0 votes
0 answers
24 views

Select correct NFC tags and reader for project

I have a project and I need some advice on the parts to buy. There are 78 tarot cards and they are placed in three locations on a table, and I need three NFC readers each to detect the card that was ...
spl's user avatar
  • 101
0 votes
0 answers
9 views

MSP430 programming JTAG

For programming MSP430 MCUs through JTAG, is this Schematic correct? I look for a reference design to make sure it will work:
Andromeda's user avatar
  • 323
0 votes
0 answers
32 views

Unknown output from the ADC module

The signal that I'm feeding into the ADC module does not carry over to the next module even though it is producing meaningful output. When I run a simulation, the module (kalmanf1ave) after the ADC ...
nisak's user avatar
  • 31
2 votes
1 answer
111 views

Unexplained mains supply affecting EV charger

I have observed some unusual behaviour between my domestic 240VAC supply and an EV charger which has over-voltage protection. I'm posting this question here in search of a possible explanation or for ...
CyclingDave's user avatar
0 votes
1 answer
46 views

what is the source of this noise when recording to raspberry pi using USB soundcard

I connect aux out from my laptop to USB soundcard mic in and use arecord to record audio. But I am getting noise even recording at CD quality. The nature of the noise is really strange as it seems to ...
Vrisk's user avatar
  • 376
4 votes
4 answers
249 views

LTspice third party model gives problem with transient analsys

I have tried to import a third party model from TI, to be precise the op-amp A551. And somehow my circuite, a power amplifier, gives me the following error. Analysis: Time step too small; time = 3....
sall's user avatar
  • 43
0 votes
0 answers
25 views

How to handle unused 32-bit data, dqs and dbi on DDR4 SODIMM module

In a design, I have used a DDR4 SODIMM module, which has 64-bit data, thus 8 groups of data (DQ), DQS and DBI. However, I will only use the lower 32 bit on the module, thus have to handle the ...
EquipDev's user avatar
  • 579
3 votes
2 answers
503 views

Stop electric motor when toy elevator reaches end of travel

I'm working on a simple toy elevator powered by some small DC electric motor. I know basic electricity. I figured out how to set up simple circuit with 3-position switch so I can turn on the motor in ...
Ari's user avatar
  • 131
2 votes
1 answer
37 views

Mode selection for Boost converter

I am currently working on a problem for designing a boost converter. Below are the parameters that are used for the calculations. Vin = 180V, Vout = 360V L = 25 μH, Operating current is 15A and the ...
Manish k's user avatar

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