An electrical load is an electrical component or portion of a circuit that consumes electric power. This is opposed to a power source, such as a battery or generator, which produces power.

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How to determine load to use in a battery discharge curve

I am making a discharge curve of a battery I am testing. So for the discharge curve, what load should I use? (This was kind of answered here, but it was kind of a guess in that the load is based on ...
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2answers
76 views

Calculating the discharge of Ultra Capacitors

Say I have two 500F ultra capacitors, connected in parallel, charged at 15V. These are the capacitors BMOD0500 P016 B01. Then say I connect the capacitors (via an inverter) to a 230V light bulb that ...
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1answer
41 views

What does “Exclusive of Load” mean?

Short Version: Does "30mA exclusive of load" mean the minimum draw while idling, or avg. draw? Long Version: While designing a circuit to interface with a radar sensor similar to this, I've noticed ...
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42 views

Draw relation of rotation speed and output power of PMAC generator with brake resistor

I would like to draw a graph showing the relationship between rotation speed and power of an ideal Sinus PMAC generator with a brake resistor R(load) to be defined controlled via a 4Q Controller ...
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1answer
44 views

Effect of load changes on buck converter

I know to some extent that the control block monitors the output and adjusts the duty cycle accordingly and the output changes with change in loading (that's why the control block is used in the first ...
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1answer
45 views

constant load on load sensor

I heard it is impossible to create scale which will have constant load on it. Is there any workaround, or what type of sensor should I buy? I need to build a scale which will handle up to 100kg. ...
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3answers
100 views

How can I properly tell if a wall wart is OK to use for old hardware?

I bought a Sega Genesis model 1 from a local thrift store recently for $10. It was sold as "broken, for parts only". It didn't come with any cables. I've ...
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1answer
45 views

Current monitor shows overload even for small load

I have a current-shunt monitor using INA202 between a 5V power supply and loads. The current monitor should turn off a MOSFET switch and disconnects the loads if the load current goes over 150mA. I ...
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1answer
36 views

Series inductor as discontinuity in transmission line

Dual to this question is the following circuit: simulate this circuit – Schematic created using CircuitLab An infinite transmission line (with characteristic impedance \$ Z_0 \$) ends ...
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1answer
60 views

Shunt capacitor as discontinuity in transmission line

As in the following circuit simulate this circuit – Schematic created using CircuitLab suppose that an infinite transmission line (with characteristic impedance \$ Z_0 \$) ends upon a ...
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0answers
35 views

How does buffer prevent loading effect?

Buffer is said to be used for impedance matching and preventing high flow of current.But how does it prevent Loading effect?How does usage of buffer overcome the dependance of the terminal voltage ...
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1answer
60 views

What is load impedance?

Like resistance for DC, Impedance is for AC. But what is load resistance. How does it used in a circuit. Had this doubt when reading a line from the book foundations of electronics by D ...
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2answers
36 views

Load switch correctly wiring

I need to use this load switch http://www.semicon.toshiba.co.jp/info/docget.jsp?type=datasheet&lang=en&pid=TCK106G . This load switch will be controlled by an MCU. Since at startup MCU have ...
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2answers
59 views

Load Resistor for high amp low voltage testing

I want to simulate a signal of 15V / 30A through a device. I will use it to ensure that a series of prototypes are capable of switching at this current. $$ P = 15 \times 30 = 450W $$ $$ R = ...
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24 views

Two different PMOS active load structure

The following is a extract from the book Model and design of bipolar and mos current-mode logic . Here we see one implementation of active load using PMOS. And this is how active load has been ...
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1answer
25 views

Avalanche diode circuit analysis of the current load

I have no idea how to work out this past exam question. I'm kinda sure is that the diode is an Avalanche diode, but I'm not even sure how Zener diodes or this work. All I think I know is that with a ...
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2answers
66 views

How to find the power delivered to the load?

I'm trying to solve a homework problem to find the power delivered to the 10Ω load. So far I found the total resistance, which is 12Ω. And I think I have the right formula to work out the power, ...
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2answers
52 views

How to use CR2032 button cells for excitation of load cell

I am using a load cell that required 9-12V excitation voltage. Can I use a few, say 4 CR2032 button cells to generate 4x3V=12V of excitation voltage for the load cell? I could also use a 9V batter. ...
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2answers
75 views

Micro-controller as a load

For my power-supply micro-controller is a load. How does this load behave like? is it resistive or capacitive or inductive load?
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2answers
48 views

Test Battery Volts applying load

Why we need to apply a load to a battery to test its voltage? I've been testing battery capacity so far using a multimeter and just hooking the probes in the positive and negative side of the ...
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1answer
92 views

Controlling dc motor in arduino with and without a load

I wonder if there is an alternative solution to this problem: I have a 3v water pump being controlled by an arduino, which pumps water out of a bucket. I would like the pump to turn off once the ...
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2answers
119 views

How can I supplement a portable generator during peak load.

I'm contemplating purchasing a 2000W generator, to power some of my tools. One potential issue i that I have a saw that pulls 2500 W at startup and then 1800 w to run. Seems to my that as the ...
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1answer
90 views

Oscillator and output load

For the Ethernet application in my design using RMII interface, I need to drive two CMOS loads (two reference clock pins, one of a Freescale Kinetis K60 Microcontroller and one of a TI's PHY chip) ...
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1answer
53 views

estimating battery discharge current approximately from ac load current

I would like to know that if we have a data logger installed at a site and the logger measured the constant load current of 10 A from the Grid(Single phase@ 230 v) during a certain time say 10 am. ...
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2answers
209 views

Java/Arduino Controlled 120VAC Power Outlet

I'm working on a project with an end goal of controlling a power outlet with a Java program. Currently, I have the relay wired to outlets, a 3 prong 120 VAC plug, and my Arduino. Everything works as ...
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1answer
50 views

AC voltage source - variable load

I'm looking for some kind of idea for controlled load for AC source testing. The output signal of source is a bipolar sine wave 5 Vpk (so it varies from -5V to 5V) and it has 1.5kOhm series ...
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0answers
32 views

3 way dimmer installation

I'm installing a three way dimmer on a 3 switches line for a light. In the dimmer notes the installation is done by replacing the three way switch on the load side. Can I replace the one at the line ...
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1answer
38 views

Electric load - Switching vs Continous

My realy says "Switching up to 16A (max. 3680 W / max. 2500 W continuous)". Does this really mean I should not have it connected to loads over 11A, in a 230V system? What would be an example of ...
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1answer
230 views

Load cell amplifier circuit

I'm designing a circuit to take two load cells as inputs, and make their sum. I'd like to know your opinion about the design. Each cell is connected to one instrumentation amplifier (INA122P). ...
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1answer
51 views

fast 5v High Side switch controlled bz 3.3v

For my led cube, I need to switch 5V (common anode layers) with 3.3v (pic32). This should happen at a high frequency. In recent builds I used pfets, but because I'm using 3.3v now, a pfet wouldn't ...
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1answer
1k views

Effect on loading a DC motor - load torque

Can someone please give a (detailed) explanation (perhaps with formula's) of how the load (torque) affects the armature current of a DC motor (seperately excited or shunt or series) ? As the load ...
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1answer
52 views

Power management at thermal power station

I have weird question, but I hope somebody can give at least hint what should I read to understand the concept. Imagine situation: There is thermal power station and a city that takes power from ...
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1answer
126 views

Determine the maximum load of a power supply

I am trying to upcycle an old bit of tech I had lying about. The main part I am looking to recycle is the power supply however I do not have specs of the power supply itself. I have measured an output ...
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50 views

Cycling peak load trips genset

I have an application where a cycling peak load from a 40hp motor is regularly tripping a 65Kw genset. Here are the details of the configuration: 65Kw Genset powered by a natural gas engine 40hp ...
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2answers
298 views

why does the parallel resistors with voltage source can be ignored as well as resistors in series with current source in term of equivalent circuit?

I have a problem dealing with equivalent circuit. I don't know why when the resistors that is parallel with the voltage source can be ignore as well as one in series with current source. Of course the ...
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1answer
137 views

Where does the current in a Dickson Charge Pump come from? Does the oscillator/PWM pin of a microcontroller also source current?

Well, I am making a small circuit which looks like this: When simulated, the load current gets up to about 200-280 mA no problem, so I want to implement this circuit in real life. My only problem ...
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2answers
298 views

Output voltage of unity-gain buffer varying with current?

I'm working on a VLC+IR transmitter that runs from batteries. I decided to use an LM317 so that the discharging battery wouldn't really affect the current through the LEDs. (Disclaimer: I've never ...
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2answers
285 views

What determines a load's current requirements?

Apologies if this question has been asked before. I'm sure it has but hard to find as wording of question may not bring up the duplicate question. Let us say we have a 10 ohm resistor as a load. ...
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4answers
997 views

Give a RL load, how do you calculate whether if it is capacitive or inductive?

This is a topic which has always confused me. For example, if the impedance at the load has the form of \$Z = R + jX\$, \$R\$, \$X\$ positive real numbers, then then network is called inductive. If ...
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3answers
191 views

Load sharing using asynchronous motors

I am involved in the design of a system composed of: multiple asynchronous motors, each equipped with separate drive, all acting in parallel on a load, via a common rack and pinion transmission. ...
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1answer
197 views

RF load (terminator) at the end of RF attenuator

Do I need to install RF terminator at the end of RF attenuator? Let's say that max power output for RM port is 50W and I'm using 100W 50dB attenuator. What if I was using 50W 40dB attenuator? Is there ...
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2answers
83 views

Do batteries have a delay when adjusting to a new load?

So I am creating a battery voltage measure, and it takes a reading both when the battery is in open circuit, and when it is loaded with a 100mA constant current. I have set it up and the reading is ...
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2answers
78 views

Comparator Output Swing Measurement

i wan't to measure the maximum and minimum output swing of a Comparator. I'm using the circuit which you can find attached. However, since the Output of the Comparator (TI LM2903) is open drain, I ...
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1answer
128 views

ADC Reading is much lower than expected

I am using a EFM32GG990 microprocessor and I am trying to get it to read a voltage using it's on-board ADC. I have made a circuit that I wish it to measure, both the loaded and open circuit voltage ...
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2answers
427 views

How to hook up a load cell to an Instrumentation amplifier correctly

I am trying to get load cells connected to an instrumentation amplifier. The load-cells I have are extremely similar to the ones here https://www.sparkfun.com/products/10245. They have 3 wires coming ...
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1answer
861 views

how to select capacitor for a crystal oscillator

Here is a 32 MHz crystal from one of TI's reference design The BOM list defines the crystal as ...
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0answers
86 views

Solar charger under rapidly varying conditions/impendance

My solar equipment consists of: Solar panel capable of: 20V Peak / 3.6A Peak Li-Ion Battery pack: 8.7V, 9Ah, (2S3P setup) My solar charger setup consists of: 5A DC-DC BUCK converter (XL4015) ...
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1answer
124 views

Differential amplifier with active load Sedra Smith

I'm studing differential amplifiers on Sedra Smith book, and I have come across the following circuit. My question is: how can NMOS transistor \$Q_2\$ have a current \$g_{m2}\cdot v_{id}/2\$ if the ...
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57 views

How do I determine what size generator I need?

What are the number of factors and considerations to be taken into account before sizing a prime rated generator? I am having a situation where I would be having 3 motors of 10 kW each and all these ...
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1answer
83 views

Capacitive load at the output for analysis of CMOS cells

This question is very rudimentary one. Please point me to the link if this question has been already asked. In general, when working with simulations and and analyzing the standard cells designed ...