Questions tagged [electrical]
The electrical tag has no usage guidance.
476
questions
2
votes
1answer
35 views
High voltage circuit powering Arduino/ESP32 - requesting feedback?
I have been struggling with this for days...This is the first time using switched power supply units to power an Arduino.
Can you tell me if this is wired correctly? If not, what needs to be fixed?
0
votes
3answers
237 views
Can I splice a standard AC power plug onto a 2-pin DIN table lamp cord?
I've acquired a table lamp with a 20W 12V bulb (possibly from IKEA?). The cord terminates with a female 2-pin DIN (41529) connector that I do not have an adapter for. Am I correct to assume that it ...
-9
votes
1answer
66 views
5 VOLTS 1 AMP TO 5 VOLTS 500 MILLIAMPS [duplicate]
I HERE'S MY ISSUE...
THE CAR STEREO HAS A USB PORT OF 5 VOLTS 1 AMP, AND MY PROBLEM IS WHEN I CONNECT A USB MEMORY STICK IT "BLOWS" THE CIRCUITS (MAKES THE USB UNREADABLE), ITS MY SECOND USB ...
1
vote
0answers
70 views
I am trying to find Vc(t) for t ≥ 0
I am trying to figure out how to find \$V_c(t)\$ for \$t \geq 0\$ in this.
4
votes
5answers
1k views
What is the best way to convert a 10V power supply into a 5V power supply?
If you were given a 10V power supply and wanted to power USB devices with it, how would you convert it to 5V? Would using a voltage divider splitting it into 2 5V lines be the best? What ohm resistors ...
1
vote
1answer
78 views
What device controls whether a signal is high or low
In circuitry, there is always inputs in circuits (for example: input A and B into an AND gate), but what exactly allows these inputs to switch states?
I think the best way to illustrate what I have in ...
2
votes
1answer
63 views
My RTL viewer replaces NAND gates with AND gates with the inversion bubbles
I want it to show this MUX only with 3 NAND gates and an Inverter.
so, I specified NAND gate in the verilog HDL code, but it keeps replacing it with AND gates with inversion bubbles without having a ...
2
votes
1answer
57 views
electronics simulation circuit
I am learning to draw electronics circuits and trying to identify the voltage and current behavior at different points of the circuit.
When learning from the internet I find simple to complex ...
0
votes
3answers
122 views
What did I do wrong - recharging sealed lead-acid battery with recycled computer PSU
Today I took an old computer power supply, stripped the yellow +12v and the black ground, and twisted half of them together each into 4 separate pairs. I then took a lead acid battery, which seemed to ...
0
votes
0answers
28 views
Why single phase motors uses double pole single throw switches instead of a single pole single throw switch?
I've seen many motor starters that have double poles to contact the motor leads to the AC source. I wonder if there is any reason for not using single pole single throw switches which are mostly used ...
0
votes
0answers
51 views
Restoration of time-shifted audio file using matlab
The two stereo channels of audio file are time shifted. Which is the easy model to restore the file to the original?
I have a partial solution something like:
Loading file like, ...
1
vote
1answer
29 views
Confusion on Voltage levels in Digital Waveforms
My question is why Io is in different direction when Vo=H and Vo=L respectively? I really can not understand the underlying mechanism!
1
vote
2answers
31 views
Normally Closed, 24V DC, 1/4 NPT Female, 1.4 Cv solenoid valve power supply
I have a solenoid valve of Normally Closed, 24V DC, 1/4 NPT Female, 1.4 Cv, 500mA max current drawn.
Can somebody verify the power supply requirement.
would this be an ideal power supply unit for the ...
0
votes
1answer
34 views
Sensitivity of a frequency meter
Can I know the sensitivity of a power frequency measurement unit?
I can not find it in the specifications sheet.
I do have, though, the accuracy of the unit (10 mHz)
Thanks in advance!!
Update : I am ...
0
votes
2answers
70 views
Three phase AC power measurement
I am trying to measure the output power for BLDC controller, in order to calculate the efficiency of the controller. I came to know that two watt-meter method is one of the method used to calculate ...
1
vote
0answers
32 views
How to make equivalent circuit diagram for 150 kV Lattice tower transmission?
How to make equivalent circuit diagram for 150 kV Lattice tower transmission.
I need to make a EMTP simulation for lightning strike and see the effect to backflash over.
0
votes
0answers
47 views
Current problem
I want to control 2 opamps to activate one circuit at a time so I designed an analog selector.
Each circuit works very well. But when I connected them the voltage on the base of T4 jump to 17V. I ...
0
votes
0answers
29 views
Circuit to select from 2 inputs 4-20mA and 0-10V
I want to select one from the 2 inputs.
if (BSP pressed) then
output=0-10V
else output=4-20mA.
I used an and gate based on PNP and NPN mosfet but it didn't work.
any suggestion plZ.
0
votes
0answers
17 views
Type A vs Type AC RCCB
I would like to install an RCCB at the electrical point that will power a few devices that are going to be in my fish pond. Documentation and general info online say that Type AC RCCB can work with ...
0
votes
2answers
65 views
How to find rated voltage of a machine?
I am trying to understand what a rated voltage/current/power mean for a machine. when I google it, I typically get information on how to find it from nameplate, but I am trying to understand it ...
1
vote
2answers
91 views
Ground Earth Resistance explained in electrical system
I have several questions about the electrical systems used in the field and the grounding mechanisms.
So, as far as I understand there are multiple systems that can be used to distribute electrical ...
0
votes
2answers
46 views
Avoiding battery charge interception with high-current devices
I could use some help to certify an assessment of an ongoing automotive issue. The vehicle is equipped with a high-performance electrical fan (40 amp draw/10 AWG), and I suspect that existing wiring ...
0
votes
1answer
84 views
Oscilloscope not visible in PROTEUS simulation
I tried simulating astable multivibrator using OPAMP. At one instant i got the oscilloscope but wasn't able view the waveform. I tried running again but this time there was no oscilloscope visible. ...
0
votes
0answers
40 views
Replacing Nimh battery to Li-ion in hybrid cars
is it a good idea to replace a Nimh battery in hybrid car (like prius model 2012) to Li-ion battery without any problems.
0
votes
1answer
67 views
The constant time value for an electronic device [closed]
i am working in a data science project that require certain information about electronic devices. So I know that for each electrical circuit there is a permanent regime and a transient regime and ...
0
votes
0answers
72 views
Basic MOSFET small signal model with no load and Rd
I've come across the most basic small signal model of the MOSFET. We have a NMOS whose drain is connected to Vdd= 5V and source is grounded. We also have biased gate with a DC 2V. Suppose the ...
2
votes
2answers
72 views
How to select a Relay that can handle a load of 42V, 3A DC?
I want a relay that can be controlled by a Raspberry Pi and can handle a load up to 42V and 3A DC. I was looking at this: relay which is rated at DC 30V/10A. Although, 30V is less than 42V but I was ...
-1
votes
1answer
44 views
Is it possible to use adapter as a charger? [closed]
I have a 8V battery and a 5v,600mA output adapter.
so i needed to charge the battery using this adapter,is it possible?
when i connect my battery to adapter, the adapter power led is glow.
is it safe? ...
-4
votes
2answers
176 views
What are the two sensors doing in the automatic bread production line? [closed]
I want to know what is the name of these 2 sensors and what function they perform
Some of you were complaining about the picture quality. It is the highest quality image I can get. Also these sensors ...
1
vote
2answers
125 views
Led ON on Spike Guard Even When Switch is OFF [closed]
I have this spike guard and it's middle led is ON even when the spike guard switch is off. I can see there are various combinations of the led and their meaning. But I see the middle led on when the ...
0
votes
2answers
86 views
Relay always damaged in switching circuit
I have a simple relay switching circuit which is used to turn off/on the power supply to a laptop.
SPDT Relay is 8A , 440AC part number--> G2RL-24DC.
The relay always gets get damaged - the ...
0
votes
1answer
44 views
Protecting equipment submerged in water against earth fault - RCCB vs MCB
I would appreciate help understanding the difference between an RCCB and MCB in the context of the situation I'm sharing below.
I have a mini fountain pump in my pond which doesn't have any earth pin (...
0
votes
1answer
21 views
How much high is the amplitude of stator-MMF of 3-phase 2-spp integral slot winding type machine as compared to 3-phase1-spp machine of same type?
Details:
No. of POLES=2; i.e 1-pole pair
SPP= slots per pole per phase
In my case,
amplitude of MMF of 3-phase 1-spp machine= 0.75;
Then what should be the amplitude of MMF for 2-spp machine ?
Is it ...
1
vote
1answer
50 views
How to design an amplifier to meet particular specifications
I need to specify the (W/L) ratio of transistors and the value of the current source in an amplifier as shown in this picture
so that these specifications are met:
*the height of the input step for ...
0
votes
2answers
39 views
Insulate active or neutral?
If you can only insulate active or neutral, which should you choose?
Does it matter?
Is it important?
Is one better than the other?
0
votes
3answers
83 views
3.7 V to 12 V boost converter - effect on cell
If I boost a 3.7 V 18650 battery to 12 V with a boost converter, would it affect the durability of the battery?
For example, if I have a 2100 mAh Li-ion boosted to 12 V, would it affect the 2100 mAh ...
0
votes
1answer
61 views
Ohms law, resistance calculation
I'm new to electronics and I don't understand why you subtract source voltage by the components recommended voltage, but you just divide by the recommended amps...
Why don't you subtract source amps ...
1
vote
1answer
48 views
How to calculate the lethal amount of current for given amount of output voltage?
I have some electrical parts that I was planning to reuse, things like laptop chargers and some parts from a printer. I searched google for what's the lethal amount of current and they mention 10ma is ...
0
votes
2answers
47 views
A generator would need to produce 'x' Volts in order to provide 'y' Amps? Am I understanding this correctly?
Let's say I have a device that requires 190A to work.
My generator has an internal resistance of 2 Ω. The device has a resistance of 0.3 Ω. This would mean that the load on the generator is now 2.3 ...
0
votes
1answer
29 views
What is the best way of connecting electricity fuse/cut-out
I am talking about home/industrial electrical fuse fitting or correct mointing . Should the fuse be mounted on L(live) wire or N(neutral) wire?.
0
votes
0answers
84 views
Consider lowering VDD to save power in a static CMOS gate. Also scale Vt proportionally to maintain performance
Will the dynamic power consumption go up or down? Will the static power consumption go up or down? Explain with proper analytics.
I came accross this question while solving a question booklet issued ...
1
vote
1answer
44 views
About signal conversion
Question is weird but it's about something that I really want to try.
AC power here in India has 50Hz frequency. What I really want to try is to make a series path with two continuous conversions. In ...
1
vote
1answer
27 views
Coaxial cable test with VNA to estimate Wave Velocity and Attenuation
I'm doing a lab course concerning microwave measurements, during which I'm supposed to test an open, short and 50 Ohms terminated coaxial cable. The cable is connected to a VNA at the S_11 port and ...
0
votes
3answers
60 views
Calculate the phase angle
I have a question about the sign of Δt :
Why is Δt in in this one positive
And negative for this one below ?
3
votes
1answer
76 views
Is it safe to bundle together 380V cable + 24V signal cable + network cable?
I have the following cables between two machines:
380V 3-phase power cable
24V signal cable
EtherCAT cable
I would like to create an interface using a modular connector such as the one in the ...
1
vote
1answer
38 views
I have been designing a micro strip patch antenna with inset feed and I have a few HFSS simulation questions
Substrate dielectric: 3.5
Substrate height : 1.5mm
Frequency: 2.5GHz
I followed a particular video on YouTube to guide me, and used an online calculator for the width and length of patch, inset feed ...
0
votes
2answers
76 views
Is there a widely used vocabulary for electronics and electrical systems, much like the UMLS for medicine? [closed]
I am searching for an inclusive view and typology of electronic and electrical systems, and the design and engineering concepts etc. that underpin them. Is there a widely used vocabulary for ...
0
votes
1answer
46 views
Garage door openers - BLDC x AC monophasic - Is that possible?
As far as I know, electronic control boards for garage doors, they basically control two main types of motors:
AC induction monophasic, one neutral and two phases, driven by TRIAC or relay. It takes ...
1
vote
2answers
81 views
How does equipment ground protects us from electrical shock?
What I have always learned is current leave the source and return back to the source, forming a closed circuit, here are the two thought experiments I had and got confused:
Scenario 1:
Here I have a ...
0
votes
2answers
101 views
Do two active high signals cancel each other?
A tp4056's temp pin is pulled HIGH, so it disables the chip. I accidentally fed a high signal into that same pin and it enabled the chip again!, which has to mean the signal went LOW. Are these two ...
