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Questions tagged [current]

Flow of electric charge - typically movement of charge carriers, such as electrons. Measured in amperes (A).

9
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5answers
654 views

What are the limiting factors of these op-amps?

I designed a multiple feedback band pass filter ...
0
votes
3answers
38 views

Total curent through two parallel resistors

voltage source- 5V This simulator shows that the curent in the left wire will be 10A, like sum of curents through two parallel resistors. Is it wrong?
2
votes
1answer
55 views

Comparing Responses for Linear and Non-Linear System in Simulink

I am going through and reviewing this unprofessional (I highlight a potential mistake in Section3.4) paper: Nonlinear Model & Controller Design for Magnetic Levitation System Specifically, I am ...
0
votes
0answers
32 views

Small axial inductor for piezo disc buzzer?

I'm planning to operate a 15mm piezo disc as a buzzer at about 5 KHz. Can I use a 5mH 0.5W axial inductor for this? Peak current through the inductor is 70 mA, average current 22 mA, average ...
-3
votes
2answers
78 views

Question About Current Flow Direction [on hold]

I've got a question that has been perplexing me for a while. (Correct me anytime) (Please do not give me any textbook definitions.) Starting with the name of the question itself, I believe current ...
1
vote
1answer
21 views

Low current rs485 and wake up

I have the following question: I have to do a network of devices based on MCU. This network in a RS485 and the device is battery powered. For save the battery I put in sleep mode the MCU and I ...
0
votes
1answer
40 views

What is the current through this parallel circuit?

I'm trying to solve the attached circuit for I1 and I2. I think I1 is just 5A but I'm not so sure about I2, I think it might be just 10/5=2A but I'm not sure if the voltage in the top right part is ...
2
votes
0answers
153 views

Mistake in published paper about magnetic levitation?

As I was reading through this paper: Nonlinear Model & Controller Design for Magnetic Levitation System, I stumbled cross section 3.3 which I could not follow. Summarizing section 3.3 Non Linear ...
1
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2answers
59 views

How much current will this LED draw?

Sorry if this is a really basic question - software engineer here, so I'm a little out of my element. I'm working on an IoT project, and I'm planning on using this button with a red LED inside of it. ...
0
votes
2answers
30 views

Regulator output current

What is the meaning of output current of the regulator. For example, IC datasheet's written as "300-mA Output Current Capability", the maximum output current must be 300mA, isn't it. What'll happen ...
0
votes
0answers
12 views

Peak current that can be support by PM8916's L17 LDO output

I am using PM8916 IC as power IC in one of my devices and I need to use the L17 LDO output of the same IC to power a Converter that needs peak current, the highest point of the waveform is about 500 ...
-6
votes
1answer
94 views

Can anyone actually explain how electrons flow in a circuit?

Can anyone actually explain properly how the electrons flow in a circuit? None of this nonsense like, electrons flow like a chain.. in some cases Electrons flow like water in other cases Imagine this, ...
1
vote
2answers
43 views

Modifying a buck converter for lower current rating

I have been learning about buck converters and I think I understand the principle of their design. However, I am unsure of how a current rating would be calculated for a particular design. The ...
0
votes
0answers
10 views

Are neutral wires linked to the neutral bar in the fuse box safe to touch [migrated]

We have a tipical fuse box, fuses and neutral wires connected to a neutral bar. Let's say we have a closed circuit with a light bulb attached to it. The bulb is working. The neutral wire is ...
0
votes
2answers
36 views

How to get stall current from DC motor model

I'm studying the model of a dc motor from this link : http://ctms.engin.umich.edu/CTMS/index.php?example=MotorSpeed&section=SystemModeling The equations are: \$\ s(Js+b)\theta(s)=K I(s)\$ \$\ (...
3
votes
4answers
73 views

Basic nodal analysis question

I have a question about node analysis method. The part I could not solve is the Node c's equation. In equations, C is represented by 3.Here is my question what is G5(i=GV) in the circuit. The empty ...
0
votes
3answers
63 views

Deenergizing Inductor

I am reading through "Practical Electronics for Inventors" and I came upon a chapter about deenergizing inductor. I understand the concept that when you cut the current going into inductor, it will ...
0
votes
0answers
24 views

Ramp generation circuit for slope-compensation

I have recently stumbled upon a relatively simple design for ramp signal generation for slope compensation applications. I still find it difficult to analyze and understand how this circuit works. ...
-1
votes
4answers
133 views

Why 'sine' wave of alternating current?

Electrons flow straight in a wire; not back and forth like a mass connected to a spring. Then, why is it that we represent the alternating current in sine wave form? We know that adding a diode and a ...
1
vote
1answer
78 views

How can charging current be understood intuitively?

The charging current I’m talking about would be the one between un-shorted phases and ground when there is a short to ground in one of the phases in a distribution network or facility. I'm not talking ...
1
vote
2answers
36 views

How do the areas of the emitter, base and collector affect their respective currents?

I want to know what will be the effect on current if we change(increase or decrease) the area of the emitter, base, and collector. For example, if we double the emitter area what will be the effect on ...
0
votes
1answer
41 views

Reducing voltage for increased current through wire

I am wondering, if I reduce the voltage going through a specific sized wire, can I therefore increase the current? I am creating a series-parallel battery bank and it will output 7.4 volts at 75 amp ...
0
votes
2answers
60 views

How do electrons flow?

I have been told that the movement of electrons is like a chain on a bicycle, however on videos for batteries i see that there is a charge seperation and when a wire is connected, these electrons flow ...
0
votes
0answers
40 views

How to calculate overloaded temperature in wire/conductor under continuously electrical current flow (adiabatic condition)?

Is there any idea how to calculate overloaded temperature in wire/conductor under continuously electrical current flow with constant current input (adiabatic condition)? In this case there is no heat ...
0
votes
1answer
33 views

How to increase current output of capacitor bank with buck booster?

I'm pretty novice when it comes to electronics given that my background is in mechanical engineering. But I am trying to design a circuit that can take a 5V (almost 0A current) to charge a capacitor ...
1
vote
2answers
53 views

Trying to split the current output of an LED driver

I am currently using an 8 channel LED driver wher I have set the outputs to produce 20mA of constant current. Problem is I have 11 LEDs to drive. So I have decided to connect two LEDs in paralled to ...
3
votes
3answers
91 views

how to reduce current to power LEDs

I am replacing a microscope lamp with a motorcycle LED headlight. The light is 20W, 9-85V DC; the driver built in and a complete black box to me. I power it with a 65W power supply (18.5V/3.5A). For ...
0
votes
1answer
36 views

How do I find the inputs/outputs of an unlabeled transformer?

I’ve been trying to wire a transformer according to this schematic. but nothing is labeled on the actual transformer. There only only colored wires. On the primary side, the Blue and White wire show ...
0
votes
3answers
138 views

Can 10-100mA kill a person / be deadly? [duplicate]

According to various sources something as little as 0.01A = 10mA can be painful, at 0.1A = 100mA you can expierence * "ventricular fibrillation of the heart". "an uncoordinated twitching of the walls ...
1
vote
2answers
65 views

How to calculate secondary winding max current output?

I have removed a UPS transformer. It is a Class B Viking transformer. Its primary side has 4 wires coloured black, green, blue and yellow. I found resistance as follows- 1. Black to Green - 17 ohm 2. ...
1
vote
2answers
68 views

Automatic switch for shop vacuum

I have just finished build my table saw and now planning for integrated vacuum system for dust collection. I've designed the circuit to detect if saw motor is switched on and automatically switch ...
0
votes
2answers
83 views

What if the current draw is greater than the rated discharge of a battery?

I have a 48 volt, 20 kW motor that I need to supply with power. I am looking at a configuration of 16 LiFePo4 cells each in series, each 200 Ah rated at 1 C. At that rated capacity, it would seem ...
0
votes
2answers
47 views

Question regarding voltage and current

Please forgive me if this question sounds stupid but I am still an amateur. I was trying to power a DC motor a while ago and blew a transistor. Later I realized that it was rated for 200mA and I ...
1
vote
3answers
104 views

Making an efficient constant current source

I need help making an efficient constant current driver. I want to power my home with LED light strips for lighting and decorative purposes. I need to be able to turn each strip on and off ...
-2
votes
1answer
39 views

DC generating plant [closed]

What would happen if positive terminal of Dc get grounded in any DC generating plant? Will it impact negative terminal and burn it?
0
votes
1answer
48 views

Can an electrical wiring system carry enough current to create an EMP?

I'm writing a spy story of sorts and I demand realism in my writing. In one of the chapters an agent, working with remote hacking assistance, enters a datacenter to steal digital certificates. When ...
2
votes
2answers
53 views

Will a 300A HV connector fail before a 600A fuse does?

I know this is a silly question but I cannot find ant data indicated it will not. The HV connector rated at 300A @ 85C and it is a 600A fuse, I cannot find a connector with a higher current rating. ...
1
vote
1answer
87 views

MOSFETs in parallel for DC : two MOSFET altenatively ON/OFF to simulate DC?

In a previous question about using MOSFETs in parallel in DC operation to increase current, it was pointed out that MOSFETs do not like to be used in DC. It got me quite some headake to understand ...
0
votes
0answers
59 views

How would you explain electron pressure across this circuit?

A book I am reading about electronics provides a diagram that depicts regions of high and low electron pressure, and thus voltage, across different sections of conductors in a circuit. Here is the ...
0
votes
1answer
43 views

Flow of electrons

I feel like this is an extremely stupid question, but I am not from electronics! In diagrams, they use conventional current. If I were to make this circuit in real life connecting battery + with diode ...
-2
votes
1answer
46 views

Conventional current flow [closed]

I have a small doubt. Where does the current prefer to go: in a external resistance region (v>0) or in a short circuit region (v=0)?
2
votes
2answers
1k views

Parallel MOSFETs to get more current (40A adjustable current source)

In my previous question about an adjustable constant current source, I was advised to use an Op-Amp and a MOSFET to generate a current source that I could adjust with a variable input voltage. The ...
0
votes
1answer
61 views

Diode OR circuit drive current

Why is there no drive current available from the circuit below when R is connected to 0V? The last sentance in this extract from wikipedia states that If R is connected to 0 volts it will have no ...
1
vote
1answer
37 views

Load current computation of complicated resistance network

I'm reading Electronic Principles 6th edition by Malvino. Problem 1.28 describes a network of resistors that I would like to know how to solve mathematically instead of experimentally (as described in ...
1
vote
0answers
59 views

Power consumption measurement on the bench

I've been using the Atmel Power Debugger to sort out power consumption issues on some µController based circuits... and have been pretty pleased. Unfortunately, it's limited to a maximum of 5.5 volts ...
0
votes
2answers
51 views

Increasing Amp Output of a battery

So I have battery cells with a rated capacity of 3.5Ah and a nominal voltage of 3.5v Now, say I have a system that requires 12A for a period of 10 seconds. For this battery it is advised not to ...
0
votes
1answer
34 views

Why we need to have a current output on power supply to drive some devices (such as curve tracer)?

Last week, I just had an experiment on lab, in which I need to use a transistor curve tracer board and thus was asked to connect it to a digital supply. I connected them and sat voltage output of ...
0
votes
0answers
20 views

Positive current source into negative supply

I am trying to use an LM334 as a constant current source on a power supply output. Because I want to have true zero output, and the LM334 operates at Vmin of ~1V, I want to put a TC7660 charge pump ...
1
vote
2answers
123 views

Do i need a resistor in this led circuit?

I have made a circuit with two (3v) LEDs in series. Connected to a 5v supply from an adapter with usb. (1.5Amp) I belive in series circuit each led gets around 2.5v which was enough to light them. ...
0
votes
1answer
47 views

Choice of wire diameter for doll's house?

I'm constructing a 1:12 scale doll's house and I'd like to use enamelled wire run within the walls for lighting. Each room would have its own circuit controlled through a switch and then to a common ...