Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [electrical]

The tag has no usage guidance.

0
votes
0answers
29 views

Synchronous Generators: The Actual Complex Power

When making calculation involving Synchronous Generators how would I calculate the actual complex power consumed by the load in MVA. I have tried to approach this using phasor diagram which is fine ...
0
votes
0answers
12 views

What insulation can be used between electrical cabin and heater? [on hold]

Good day, I work in a paper factory and we have a heater directly behind an electrical cabin. The positions of the two must remain the same. The heater heats plastic packaging to 160 degrees celcius ...
0
votes
0answers
19 views

Single line electrical wiring diagram to be in arc or perpendicular line shapes

For the single line electircal wiring layout of a residential building or any, which is the best standard used to represent. Like from a switch to a light, do we represent them with arcs or straight ...
0
votes
1answer
49 views

Embedded System power requirement calculation

How can I measure total power requirement of an embedded system which consists of a lpc2138 interfaced with various other components such as lcd, humidity sensors and temperature sensors. Also the ...
0
votes
1answer
57 views

How to design RF PCB to ensure the 50 ohm impedance

I do not have any experience designing RF circuits and I am finding many challenges for my project. One of them is to match the 50 ohm impedance that some components demand. In the input of my PCB I ...
-1
votes
1answer
26 views

Can a BPSK transmitter be used as an ON OFF keying transmitter? [closed]

If the data bits ( 0s and 1s) are not converted to symbols (1s and -1s) can that BPSK transmitter be used as an OOK transmitter and is this going to lead to energy saving?
0
votes
1answer
60 views

Power issue on connecting controller to FTDI programmer

Hi, I have connected my controller (ATMEGA2560) input to 5V power supply. At the VCC terminal 5V is shown. The VCC, TX,RX, RESET and GND pins are connected to a FTDI programmer port as shown in figure....
0
votes
0answers
26 views

Flicker noise in a CMOS Zero IF Receiver

I am intending to use direct down conversion receiver architecture with CMOS technology for a relatively narrow band signal, does a good receiver design with large front end gain overcome the effect ...
4
votes
1answer
717 views

What is wrong with this soldering iron?

It's body is blackened, just after 5 minutes of heating and it's body is also bent. How can I solder when the iron itself works so poorly? P.S: I am using it for the first time.
4
votes
1answer
68 views

MOSFET: How can I find conduction parameter and transconductance based on graphs?

So I have my graphs (below) with various MOSFET characteristics. I don't know device dimensions or geometry, therefore I can't solve for the 2 directly with an equation. Otherwise I would just do that....
1
vote
2answers
83 views

Does this look like a correct Bandpass filter?

A project task assigned me to make a simple series RLC bandpass filter with values B = 73kHz & freq center = 4.8MHz known. I use equations B=R/L and fc=1/(2pisqrt(LC)) to get the RLC values. ...
0
votes
2answers
58 views

\$pV/\sqrt {Hz}\$ in Power Spectral Density

I am trying to plot a Noise Spectral Density from 10 kHz to 1 MHz. The Graph shows a cure which at 1 MHz the noise is 76 pV/rootHz. I am unable to understand that unit definition here. Becuase the ...
0
votes
0answers
51 views

Designing Bandpass filter with bandwidth and center frequency given?

I'm having trouble determining RLC values for a bandpass filter with these given values: Bandwidth: 73 kHz Center freq: 4.8 MHz I use equations \$B = \frac{R}{L}\$ & \$f_{center} = \frac{1}{\...
0
votes
0answers
42 views

Need help to develop two timers that takes input from keypad and timer can change on the fly in my project Traffic light Controller in VHDL

Here Pmodout is Output that is coming from keypad decoder. I am trying to figure it how to apply two inputs from keypad for different timers TS and TL while running my traffic light controller project....
0
votes
0answers
30 views

2-Bit Comparator

Can someone explain to me this simplification from the equations to the circuits? how from(A1(x-nor)B1) we can take the simplification(A0B'1B’0 + A1A0B'0)?
0
votes
1answer
48 views

what is the German/Austrian nomenclature(Voltage and current direction) in electronic circuit?

AS I came from a country where we use the french system in defining the voltage current arrows in electronic circuit, I am confused about the German/Austrian system where I see the voltage arrow is ...
1
vote
1answer
83 views

How can 400V & 690V on e-motors result in the same power

Forgive my ignorance, but how can two 3-phase ratings on the same motor result in the same output power? The one I have is rated for 0.7kW in triangle for both 400V and 690V.
0
votes
0answers
50 views

DTR and RTS pins interface for ESP32 auto reset circuit

I'm trying to program ESP32 using FT232rl by following the standardized transistor circuit. 1. DTR and RST using a series capacitor as shown, program uploads successfully by pressing the IO0 button to ...
0
votes
2answers
140 views

Ohms law and LED driver efficiency? How can this possible be true?

I am having a meltdown with a Chinese supplier at the moment and hope dearly that someone can help. I have an LED driver that is in my mind 28.8W. The output of the driver is 48 V @ 600 mA (48 V x 0....
-5
votes
1answer
88 views

Need electrical schematic of this component

For my graduation project I need this converter but I would like to have the electrical schematic. This is the link to the store where I bought the part. That's all I know. I have looked up the chip ...
2
votes
4answers
91 views

Generator to home wiring

I live in South Florida an as such need to have generators for hurricanes. I have 2 Generators, a small 3300 Watt Inverter and a big loud 9000 Watt generators. Edit: My plan is to use only 1 ...
0
votes
0answers
28 views

Power transformer impedance

I was wondering if there are any refernces pertaining to the impedance and resistance of generator step up transformers. I have different transformers ranging from 500 to 115 kV on the HV side and 9 ...
0
votes
1answer
28 views

Synchronous Motor Power and Frequency Relationships

I'm having a difficult time trying to understand what effect the frequency of a power supply has on the power of a synchronous motor. For example, if the supply frequency were to increase from 50Hz ...
0
votes
1answer
65 views

Can you convert two wire 220 (no neutral) to normal 110?

We have a water pump way out in the field (500+ long wire run) that is wired for 220 with two wires - no neutral. It would be very, very convenient to have a power outlet at this site for tools, etc. ...
0
votes
0answers
26 views

How to solve this problem with thevenin's equivalent?

How do I get thevenin's equivalent to compute the time constant in the given circuit? The translation is that the switch is moved to position 1. Image of the circuit:
1
vote
1answer
26 views

How to know if a motorcycle battery and power generator is enough to keep an device turned on without discharging the battery?

I have an arduino project in mind but I have some questions before I can start to make it. I need to plug an arduino Uno on my motorcycle, but I dont know if it will consume too much energy and lower ...
1
vote
1answer
68 views

Power Switching using MOSFET and opamp

I'm trying to understand the Arduino design. LM358 and FDN306P is connected in between USB input and primary source input. In presence of USB and primary supply the Arduino mega board is drawing ...
-2
votes
1answer
69 views

DC signal output 0-5V with constant 10mA

I am designing a Digital Logic Board and need to add a DC signal output from 0 to 5V (with potentiometer) with a constant 10mA. I have checked designs with LM317 and LM334 for adjustable current upto ...
1
vote
2answers
102 views

Laptop fried from spark while connected via USB to a battery system

EDIT 10/11 9:40am Central: I learned from my partner on this project I got the order of events wrong. I have edited the post accordingly. I am working on some custom electrical hardware for ...
2
votes
1answer
72 views

What are different battery capacity algorithms used? [closed]

I need to implement an algorithm to know the capacity of a battery. I don't want to use any external gauges which are available on the market. Can you suggest which algorithm(s) is/are popular? Can ...
1
vote
0answers
100 views

Please help identify this vintage component

I got this item in a bidding lot and have been trying to figure out what it is ever since. The nearest I can tell it is either an electro shock therapy device or perhaps a remote detonator. It has ...
0
votes
1answer
21 views

How to get the Forward voltage of a tachometer?

I am currently in the process of building a circuit board for components that I am going to use on a lathe. I want to use this tachometer. https://www.amazon.com/dp/B00VKAT8A2/ref=...
1
vote
1answer
60 views

what is exactly 'gain and loss' is and how is it used?

I'm kinda confused by its definition. I know that gain is a measurement and gain and loss is the calculation (??). I'm still in 12th grade. Please guide me.
2
votes
0answers
101 views

Identify this circuit symbol with two overlapping circles [duplicate]

I came across some images of schematics and have never seen this component before - what is it?
0
votes
0answers
49 views

Power calculation for given load

Peak Load Normal/Actual load Currently available 300kW 180kW 200 Amperes The system is currently running on 200A connection ...
0
votes
1answer
13 views

Need to find a compatible ac adapter

I have a Syemour Duncan guitar effects pedal that I bought several years back. I seem to have lost the power adapter for it and they don't make them anymore. I looked at the power input on the pedal ...
1
vote
0answers
75 views

What is the definition of hull voltage?

I'm studying the subject Electrical Safety in Engineering and a special term really drew my attention. When I tried to google it, no any option was suggested but hull protection. In the presentation ...
3
votes
1answer
72 views

Create my own battery for my electric bike [closed]

I was wondering if it's possible to avoid buying a $400 48V 15Ah battery with an output of 54.6V and 2A, and instead make one by joining multiple 3.7V 5Ah batteries in series and or in parallel? Is a ...
0
votes
1answer
45 views

How could the Gate-Source potential difference be neglected?

I’ve been reading the book Electronic Principles by Malvino In the Voltage-Divider bias section of JFET, if gate current is negligible then how did Gate Voltage attain a negative value, given Vdd ...
2
votes
2answers
46 views

Connector type suggestions required for 12V supply

I made a power supply enclosure with a mains switch and now I need external DC connectors to be mounted in the slot shown. I want to mount two female connectors onto a 3D printed panel, that will sit ...
5
votes
1answer
173 views

I purchased a few of these units and have no idea what they are. Is there anyone that might have some suggestions?

The item measures 1" wide and 1-1/4" high nad about 1/2" front to back
0
votes
1answer
92 views

How much capacitance/joule/watt is needed on average household' energy storage system with supercapacitor?

I am on the process of making assumption how much capacitance/joule/watt is required on average supercapacitor as household' energy storage system. I plan the design for energy hub to be charged by ...
3
votes
1answer
112 views

Giant pogo pin or spring probe pin for registration during electrical test

Solved: if you search for "GP-2 PCB Board Umbrella Shape 5.3mm Tip Testing Probe Pins Receptacles" you will find these probes! Thanks for the help! I am designing an electrical test fixture, and I ...
11
votes
1answer
1k views

Symbols: Double-arrow circle enclosed “10” on electronic appliances

What does the symbol that says 10 inside the double arrowed circle mean? I have seen a similar symbol on another appliance that had the number 25
0
votes
2answers
77 views

OpAmp Comparator Circuit Design for High/Low voltage measurement

I am new to this. I want to make a circuit to measure the voltage from (0 ~12 V), which can have 2 op-amps as comparator to give the output positive, when the voltage goes from 8 V to 12 V and give ...
1
vote
1answer
51 views

UPS for 1.1kW system [closed]

We have 3 motors each 0.37kW, they are now running on mains power, sometimes mains power cutoffs/fails, in that case we want the motors keep running. The motors are controlled by a PLC which do not ...
4
votes
2answers
480 views

Capacitor and inductor working principle

I want to know that there is opposition mechanism of current in inductor say back emf than what is opposition mechanism of voltage in capacitor ??? And also want to know that when inductor suddenly ...
0
votes
0answers
62 views

How does the wind farm decides to give priority to reactive current during faults or voltage dips? [duplicate]

The grid code for lvrt system says that during low voltage faults wind farm must give priority to reactive current and supply it to grid and decrease the active current. How does it provide reactive ...
0
votes
1answer
52 views

Can the TFT in LCD displays be made in the nanometer range?

Can the TFT elements and hence the pixels in an LCD display be made in the nanometer range? Say 10nm x 10nm?
0
votes
1answer
124 views

Capacitors in parallel with Voltage Source

Why can't capacitors be connected in parallel with ideal voltage source. In various questions involving it we were asked to ignore the capacitors, by our teachers without valid explanations.