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Questions tagged [load]

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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Controlling On/off of WL-134 Module with ESP32

I want to control on/off of WL-134 RFID module from GPIO of ESP32. WL-134 requires 9V, 140mA on its input so Basically I want to control 9V input from GPIO of ESP32 when I dont want to use RFID module....
Zunuran Nasrullah's user avatar
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1 answer
78 views

Driving a power MOSFET successfully

I have recently purchased this power MOSFET for a project (dump load resistor): https://uk.rs-online.com/web/p/mosfets/6867852?gb=s Alongside this I have bought a MOSFET driver see link: https://uk.rs-...
Jasper's user avatar
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3 votes
1 answer
63 views

Voltage drop issues in LTspice simulation for buck converter using SW model

I have a LTspice design issue where I encounter the same problem, even when I use other available simulations. Whenever I increase the load, there is a significant drop in voltage, despite having ...
chami's user avatar
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1 answer
32 views

Diodes selection for High Side switch protection against inductive load

Hello I would like to design protection for HSD, BTS7200-2EPA against inductive load. Spec data for the inductive load is limited. But the PCB was designed for 2.5A peak, and approximate L and R_L ...
min_c's user avatar
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1 vote
1 answer
72 views

How much current can I pull out of a battery

So I know an average PP3 9-volt battery has about 500mAh of capacity. If I wanted to, for example, draw 3.5 amps, the battery would last about 8 or 9 minutes, though that would be assuming the battery ...
Ombrezz's user avatar
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3 answers
48 views

Where or How can I make AC adjustable load for 120? [duplicate]

The thing is that I want to test the efficiency of some DC-AC inverters but I have to use an adjustable load because the CEC or EU efficiency weighted calcs request to have the perfomance on 5%, 10%, ...
Angelo Lorenzoni's user avatar
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18 views

Calculation of Load Impedance of three phase Inverter

Could anyone here please assist me how the Equivalent impedance of Load of three phase inverter is calculated from the Inverter parameters shown in below screenshot? This screenshot is tutorial ...
Alison's user avatar
  • 347
1 vote
1 answer
128 views

Camera trigger driver circuit using Arduino to 2N7000 N-channel MOSFET - off behavior with 47 kΩ resistive load

I'm making a circuit to trigger several machine-vision cameras. Simply splitting the digital output pin of a microcontroller, e.g. an Arduino, works fine for a small number (<5) of the newer ...
Andrew Spence's user avatar
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1 answer
44 views

Estimating lithium-ion battery run time at different voltages

A polymer lithium battery in a powerbank (marketed as 30,000 mAh / 3.8 V, 114 Wh), has an actual electric capacity of 19,944 mAh, and an energy capacity of 104 Wh as measured with a constant load ...
user3026965's user avatar
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56 views

How can I sum the output of the two opamps and multiply the voltage swing to +2vcc and -vcc

I have a VtoI circuit that you can see in the figure below. According to this circuit, I can receive a maximum sin current of 4 mA with a maximum load of 5 kΩ. Considering that the supply voltage for ...
raha's user avatar
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Relay circuit for DC LED strips switch

Is this schematic OK for 24 V UVC light control via 5 VDC relay?
Zunuran Nasrullah's user avatar
1 vote
1 answer
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Connecting multiple loads in self-balancing parallel [closed]

I have three (or 'n', where n=3 at the moment) large LED panels that I want to run in parallel. As we know (or should have known before the 'royal we' actually tried it!), just wiring them together in ...
jackisquizzical's user avatar
0 votes
1 answer
85 views

High voltage pad buffer design with 2nF load and ringing on first stage output

I am trying to design a high voltage (12V) buffer that will drive a sine wave with rail-to-rail peak-to-peak amplitude and a big capacitive load, maybe 3nF. Browsing I came upon this Master's project: ...
San's user avatar
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-1 votes
2 answers
67 views

Can one boost converter power three 5 W loads in parallel?

I want to power three 12 V/5 W light bulbs in parallel. I have a 3.7 V Li-po battery which has a discharge rate of 20 A. I have an LTC1871 boost converter. Is it possible for me to power the circuit ...
Durrani Hakim's user avatar
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2 answers
57 views

Single-phase voltage inverter

I'm currently working on a single-phase voltage inverter with MOSFET transistors and RL load. I would like to realize width control of the inverter with independent frequency and program settings ...
Simplifier's user avatar
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1 answer
80 views

How can I make sure load draws the correct current?

I'm using the following boost converter topology to supply power to a vacuum fluorescent display. The PWM signal is 500kHz at a 80% duty cycle. I'm getting the 75V I need with some headroom to spare. ...
MXVG's user avatar
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2 votes
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Typical load examples for RL and RC series and parallel circuits

I have already learned theoretical description of RL and RC circuits and their behavior. But now with a benefit of hindsight I have never truly learned about typical real world loads that have similar ...
maranovot's user avatar
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37 views

Total Consumption Calculation for Multiple electric ovens

Regarding NEC Table 220.55, if I have 4 ovens at 9 kW each, since they do not exceed 12 kW, I should refer to column C. However, my question is: Is it correct to consider 17 kW as the total ...
Julián Oviedo's user avatar
5 votes
2 answers
404 views

Load Selector/Load Switch

Following the provided schematic, my goal is to design a circuit that can determine the direction of a Pulse signal based on a control signal (CTL). To achieve this, I am utilizing two pmos ...
Nedou's user avatar
  • 318
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1 answer
111 views

How higher load (high R) draws more current when the nature of resistance is to reduce/restrict the current?

Consider a voltage in a circuit(say 100 V) in a closed circuit, and a resistor 10 ohm and a Load of 20 ohm connected across it. when you turn on the switch, current through them is almost 100/30 (3.33~...
Fredrick's user avatar
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1 answer
54 views

How to use the Load Line technique to intersect two dynamic electrical components?

I have an incandescent bulb in series with a battery and a constant voltage source (a charger), and would like to work out the current drawn for a given input voltage from a constant voltage source (...
killingtime's user avatar
-1 votes
2 answers
65 views

Can a generator with rated ouput 2.5kW handle 2 PCs rated 600W and 500W connected to two UPS rated 3000VA/1500W and 2000VA/1200W [closed]

I'm having issues with different answers from ChatGPT and Bard. I'm not an expert so I would appreciate an expert opinion. I have a PC rated 600W connected to a UPS rated 2000VA/1200W with a power ...
Sky Tech's user avatar
1 vote
1 answer
86 views

If the three-phase voltages are square waves, is there a neutral voltage in a balanced wye-wye configuration?

I am analyzing a wye-wye configuration circuit. Both the source and the load are balanced. The source is three-phase. Each phase is offset by 120 degrees. Neither the source nor the load is grounded. ...
elvishpotato's user avatar
0 votes
2 answers
225 views

Why do we need admittance, susceptance and conductance?

What is the need for modelling circuits and transmission lines, and loads using variables stated above when we can use resistance in the real domain and reactance in the imaginary domain. Are not the ...
MALLU's user avatar
  • 69
0 votes
1 answer
64 views

Power supply oscillations when driving LEDs with microcontroller

I driving some LEDs at about 114 Hz with a power supply of 9 V and a max current supply of 150 mA, LEDs are running about 60 mA I have some LEDs in parallel. If I increase to 200 Hz it's the same, How ...
Citi's user avatar
  • 185
0 votes
1 answer
29 views

Variable BLDC load

I need to test several BLDC motors and their ESCs, primarily to determine the motor's capability and power consumption, as well as the ESC's ability to drive the motor at higher current. Aside from ...
Jedi Engineer's user avatar
1 vote
4 answers
140 views

Generators given in kVA but loads given in kW

If I have a generator at 13kVA 0.8 PF. It is capable of producing ~10.4kW. I have a load of 10 kW but at a 0.7 PF and therefore consuming ~14.3 kVA. What is the relationship here? I thought this was ...
SS1's user avatar
  • 89
0 votes
0 answers
310 views

Miller effect in CMOS inverter

I have a doubt concerning the Miller effect. I found on more than one source the following situation: where Cgd1 and Cgd2 are modeled as a capacitor connected to ground as a consequence of the Miller ...
Urza_tron's user avatar
  • 101
1 vote
0 answers
39 views

Pond auto top-up project switch failure issues

I am installing a system to top up my pond when the water level drops below a certain level using a solenoid valve. I decided on 3 float switches - low level switch starts the filling, upper level ...
Triman's user avatar
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0 answers
37 views

Estimation of delay in digital circuit

I found this way to compute the High-to-Low propagation delay. How would this model be modified if instead of Having only a Cload after the transistor, there is a L-shaped RC segment (a low-pass first ...
Urza_tron's user avatar
  • 101
1 vote
3 answers
479 views

Transistor switching

I am using transistor as a switch, But am having a slight confusion. I am using the diagram below where I am using a 10ohm resistor. As I start switching the transistor instead of going into ...
user avatar
2 votes
1 answer
308 views

How to use a load profile to calculate energy consumption

I usually receive electricity bills from the utility but due to issues on their end, they haven't sent me bills for the several months. Instead they gave me a load profile for a few months which has ...
EnergyNewbie's user avatar
0 votes
1 answer
119 views

Unresolved Issue in MOSFETs-based Variable Load Circuit Design and Simulation

I've been diligently working on designing a variable load for the purpose of testing both AC and DC power supplies. For this task, I have opted for the integration of back-to-back MOSFETs in the ...
Cinar Reis's user avatar
0 votes
0 answers
36 views

Any gotchas using high side side load switches to drive other load switches?

I want to make a power distribution board using high side load switches, something like this Infineon product: https://www.digikey.com/en/products/detail/infineon-technologies/BTS6143DAUMA1/1281799 ...
bobwood7651's user avatar
0 votes
2 answers
126 views

Voltage fluctuations in TIP122

I have used the following circuit diagram for power supply using a transformer,simple bridge rectifier and filter capacitor at the back of it to get 12V dcI have used the TIP122 as shown: Idealy the ...
user avatar
0 votes
1 answer
87 views

From breadboard to PCB, MOSFET not able to control load

I designed a simple circuit like the one in picture to control a load: Basically, if I'm viewing this the right way, I have a GPIO from an Arduino on the D6 point to control a MOSFET (it's actually a ...
Sfrow's user avatar
  • 111
0 votes
1 answer
71 views

120 Vac, three phase, 400 Hz power supply - how important is balancing load?

We have 208/120 V, 400 Hz outlet. Can I use a single phase from the outlet to power my hardware or do I need to maintain equal load on all phase? Let's assume that the max current draw is around 6 ...
Sam Shurp 's user avatar
2 votes
0 answers
77 views

Crystal Load capacitors & ESR

In the KSZ8863 datasheet, the crystal specification is given (table 9-3), page 85. Here the ESR is specified to 40ohms with no minimum nor maximum marking. Load capacitance is specified to a max of ...
user avatar
0 votes
1 answer
124 views

Looking for alternative analog/digital circuits to drive low impedance with high current

I am looking to drive a load with the specifications as follows: Load Resistance = 2.2 ±0.3 Ω Load Current = 1.5-4.5 A Nominal Load Current = 2 A The load current should never go below 1.25 A at any ...
Debugger_Op's user avatar
0 votes
3 answers
403 views

Voltmeter reading over 63 amps with no load attached

Please see the attached pictures. I am new to electrical stuff and experimenting. The meter in the attached pic shows over 63 amps with ZERO load attached. Is this meter damaged?
Matthew Neesley's user avatar
1 vote
1 answer
173 views

Does car alternator speed increase during load dump?

I am trying to understand the mechanism of voltage surges during load dump in automobiles. As per this article - The load-dump event has two components. First is the pulse amplitude (VP), which ...
Dynamic_equilibrium's user avatar
2 votes
3 answers
99 views

Utility of a load resistance for measuring another resistance

In this paper they need to measure the value of an unknown resistance RS, whose value is the output signal of a sensor. However, instead of measuring this resistance directly with a multimeter, they ...
user21390097's user avatar
0 votes
1 answer
2k views

How to wire a 6-pin relay?

I have the relay described in this datasheet. I have the z-type. It has 6 pins on the bottom. I want to control this relay with an Arduino device and all it has to do is work like a switch. simulate ...
Carl's user avatar
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5 votes
6 answers
2k views

Purpose of 1 kΩ resistor in parallel with load at output of op-amp

As I was reading some op-amp data sheets, I noticed they placed output resistors to ground in some test circuits. These can be seen in the insets of the plots below for the LTC6228 and the LT6202. ...
py_man's user avatar
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0 votes
0 answers
98 views

Loading problem with circuit simulation

EDIT #1 So I understand now the phenomenon that is happening. Taking operational stage 2 Switch is OFF. So there are the 2 cases discussed. RL = ∞ (exaggerated scenario) the current I1 >> I2 ...
Dimitar Zhekov's user avatar
1 vote
3 answers
1k views

P-Channel MOSFET used as a load switch, practical doubt about Vgs

UPDATE AT THE BOTTOM in a battery powered project with high current I'm using a P MOSFET as load switch in place of a mechanical switch to prevent inrush current and consequent spark on the switch ...
Fabio's user avatar
  • 11
4 votes
3 answers
2k views

If batteries are arranged in series in a closed circuit (I.e. with a load, which is constant) why doesn’t the current increase when voltage does?

I guess people have asked slightly similar questions to mine before, but I still haven’t been able to find a complete answer as to WHY the current doesn’t increase even when the voltage in a circuit ...
Princess Quack's user avatar
0 votes
1 answer
42 views

Volt/load meter - DAQ question

I have an analog output from a FANUC Variable Frequency Drive that gives a voltage in the range 0-10v depending on the load. I've cut & paste the relevant parts of the manual below. I would like ...
DrBwts's user avatar
  • 133
1 vote
6 answers
337 views

Solar seller provided wiring diagram: Is this diagram of any use or unreliable/inefficient?

A solar equipment seller provides this wiring diagram (not mine): There are three terminals on the solar charge controller: Solar IN, ...
Codebeat's user avatar
  • 1,326
0 votes
1 answer
612 views

ESP32 and TP4056 lipo charging

I'm currently working on a project involving an ESP32-S3 Microcontroller. I want to implement a few things that are very hard for me to figure out. This is my current TP4056 charging logic + battery ...
Cem Pamir Bana's user avatar

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