# 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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132 views

### Gain with load or gain without load?

There is a problem I have been dealing with for hours. In my Electronic 1 lecture, small signal analysis was like this: The small signal equivalent of this circuit in my lecture notes was this: When ...
92 views

### How to find the load resistor's resistance?

Use max power transfer theorem to calculate the value of RL for the following circuit. I've done the Thevenin's equivalent circuit but from there I don't know how to find the $R_{Load}$. I need it ...
39 views

### Simulating RV32I ALU + load/store instructions using verilog

I'm writing a Verilog code to simulate RISC-V RV32I ALU and Load/Store instructions in Verilog. It contains of 5 parts: regfile.v- which contains the 32*32 registers required for RV32I, decoder.v- ...
51 views

### How much load DC motor can move? [closed]

with 1000 rpm how much load it can move on 12v? I want to no load of DC gear motor on 12v and 5v
58 views

### Gas discharge tube load type

I can not find any information about the type of load of neon lamps, for example neon probe or wall contact plug or extension cord with switch with small red lamp. I think this is a passive capacitive ...
152 views

### How to find the dynamic energy of a processor without using capacitive load?

I have the following question: A cell phone performs very different tasks, including streaming music, streaming video, and reading email. These tasks perform very different computing tasks. Battery ...
53 views

### What is the meaning of load of a line?

in Powerworld there is a function called ''line flow pie'' which indicate the percentage of load of the line. But what is it? I think that it is the ratio between the current on the line and its ...
88 views

### Is it ok to charge a battery with TP4056 while using it, if

Question Is it ok to charge a battery with TP4056 while using it, if the current consumption of the load isn't higher than the charging current of TP4056? and if not why? Trying: To have a 200mah Li-...
107 views

### Correct way to build a load lamp setup for circuit testing

I have a 3 way extension lead that I would like to use to stick it in the wall, put a load lamp (40W oven lamp) in series with it, and then use one of the prongs to insert my circuit under test. (the ...
128 views

### That Wall Warts Dilemma

I have a bunch of wall warts of widely varying DC output voltages. I find that they almost invariably show a no-load (or low-load) DC voltage considerably higher than their stated rating. I'm ...
23 views

### Test load capacity of cable & clips with only constant current/constant voltage power supply?

I want to test a 20m wire and soldered alligator clips on each end to see if it can carry the needed current I want to use it for (eg 5A.) Can I just hook it up to the terminals on my bench top (lab ...
90 views

### Shunt Burn Issue

I've this schematic, where I'm blinking output bulbs (21W @ 12VDC). Rate of blinking is 85 counts/min. The wave comes to be of 700ms. On time 350ms. In this 350ms of On time, initially I skip 50~100ms ...
206 views

### BJT Common Emitter - Active Load Biasing

I'm experimenting with/learning about the use of active-loads with a common emitter and I've hit a wall. When using a resistor in the collector it makes sense how the output voltage bias can be set to ...
67 views

### Programmable Power Supply Design: Issues with variable load and voltage stability

TL;DR: How can I stabilize/regulate an output voltage coming from a DAC and use it to drive a load? Long-time web-searcher/lurker, first time poster. I've been designing an automated test station for ...
259 views

In my first layout, with a 9.2k load I get a gain of ~55 (20mVpp in -> ~ 1.1Vpp out). My current understand is that if I replace the resistor load with something else that presents as 9.2k (i.e. ...
58 views

### Choosing power supply with sensor

I have a sensor that requires 9-30 VDC power, 600 mW at 24 VDC nominal voltage. I have a power supply that can source up to 15 VDC and up to 400 mW in power. If 24 VDC is the nominal voltage of the ...
3k views

### What is Capacitive Loading (Intuitive understanding)

I have read about capacitive loading. But what does it actually mean like intuitively? Just asked this question so as to get an intuitive answer and also know what should I understand when one says ...
64 views

### load resistor - my setup is valid?

i want to test my output current of transistor 2N3906. I have two questions. Is my setup valid to measure the max load of the (2N3906) transistor? One plug of multimeter is on leftmost pin of PNP ...
34 views

### is is possible to drop voltage without knowing a components amperage

I am new to circuits/electrical stuff Correct me if i am wrong. if i have an led (2.1V / 0.02A) and if i give it 0.02A it will only take 2.1V or if i give it 2.1V it will take 0.02A Ohms law (\\$I=\...
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### UPS in front of an ATS for generator protection

At the countryside house there is this setup: And I am trying to protect the generator and house load from brief ~ 1s power outages like so: It works fine in normal conditions. Trouble is when I ...
116 views

### Drive Capacitive load with toroidal transformer

this question is related to my previous post: Toroidal transformer voltage breaks down I am trying to build a circuit that drives a capacitive load (approx. 9nF) through use of a toroidal transformer. ...
69 views

### Differential Amplifier - Active Load Current MIrror Logic

I'm trying to wrap my head around the workings of a differential amplifier when a current mirror is used as an 'active load' With reference to this Youtube video leecture: here My understanding so ...
143 views

### How to design a no-load detection circuit and auto cutoff if load is not presented?

How to design a no-load detection circuit, I couldn’t find a reference design, Is this possible task to perform? Load is an LED setup, 150V DC, 30mA If load is not connected to the circuit, power path ...
116 views

### I do not understand this sentence: “Resistor is used to stop loading the transistor”

In this circuit, resistor R4 (just before the transistor) is used to stop loading the transistor. I do not understand the part "resistor used to stop loading the transistor".
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### How does a boost converter power the oscillating circuit and load at the same time?

so I've put together a boost converter circuit of my own and I have a problem, I want my boost converter to output reasonably high current but whenever I connect a high current load - the astable ...
72 views

### Bleed resistor with a load that can be turned off

I have simple AC to DC 40 W, 18 VDC power supply with a bleeder resistor to drain the caps. However, the load can be turned off of independently of the power supply. This means the bleed resistor ...
68 views

### BJT Differential Amplifier with active load Analysis

I completed the theoretical parts of DC and AC analysis. I want to test them with the simulator. Both DC and AC analysis failed. I killed DC sources in the AC analysis section and I short-circuited ...
363 views

### Single and 3-Phase Load Calculations

I have a probably obvious question about powering single phase loads from two legs of a 3 phase supply and how this impacts current draw calculations. This is something that is commonly done in my job ...
75 views

### Turn LED OFF when load is disconnected

Link for the System This is my existing system, I would like to Add a LED indicator which will turn off when the Lamp get burned/damage. Someone told me to use transistor but am not sure which ...
45 views

### Adding Parallel Diodes to a load

This question is based on my previous question - Measuring voltage drop across a diode in a switched circuit I have started a bounty on that question. At the same time, I am trying to understand why ...
141 views

### Behavioral current sink in ltspice

In order to simulate a wireless sensor in ltspice, i need to model a load which draws 25mA current for 1sec every 10 min. Rest of the time it draw 40uA. Is there any way to do that?. I tried ...
102 views

### Impedance Matching between Source and Load

I am having this basic doubt In the basic crude basic block diagram, we have a source, transmission line and load, all having an impedance of 50Ohms. But according to maximum power transfer theorem, ...
60 views

### Auto disconnect the load while charging the battery

Here is a tentative schematic that would use the battery (3.7V, 3500mAh single 18650 battery) to power the load under normal circumstances. The charger is disconnected at this point. When the AC-DC ...
62 views

### Two 200V outputs on 1 DC electronic Load

I have a product with two 230V outputs. I want to test if the product is also working correctly under high load(2kW on each output) I have an electronic load with 1 output. Can I just connect both ...
53 views

### Why is the load a resistive load, not an inductive load when I measure the current and voltage of the transmission line?

Question: Measure the transmission line of a substation. The relation between voltage and current is that the current lags the voltage for 180 degrees, so now I want to ask Which part of ...
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### Adapter load switch MOSFET schematic questions

I have a few questions concerning a input adapter load switch schematic for a battery charger IC (bq25780S). I posted a screeshot of this part of the schematic from the reference design (BQ24780S ...
374 views

### Capacitance multiplier with voltage regulator

I am trying to make a low noise voltage regulator. My concept is to use a symmetrical regulator using LM338 followed by capacitance multiplier (ESP version). According to Rod Elliot from ESP, the ...
54 views

I'm having a hard time explaining to myself why the output voltage of a buck regulator drops at the load when the load pulls more current than the max limit of the buck regulator. Can someone help ...
151 views

### what is the load line and operating point used for in practical?

I have a hard time understanding what an operating point and load line represent and why do we need them at all. After reading some wikibedia, What I got is this load line represent response of the ...
261 views

### Voltage Reference Resistor Calculation (Shunt)

I am trying to design a circuit using this LM4040-5 Voltage Precision Reference for my DAC8554, but I can't for the life of me figure out how to properly calculate the resistor value to be applied. ...
71 views

### How do I power many devices off of a low voltage microcontroller?

I'm new to electronics. I have a GENIE 08 microcontroller, and I want to control multiple LEDs from one pin, and a few buzzers from another, and an LCD from one too. I am worried that the power ...
59 views

### 22mA dummy load

Welcome all. I have system with 5.1V PSU sourcing 20mA. My load is circuitry running of 5V sinking 15mA to 18mA. However, in extreme condition my load sinks 22mA. I need to test each PSU to see what ...
64 views

### What is the effect on power grid when utilization goes down some threshold?

Today (April 5th, 2020) at 9:00 PM IST, people across India are expected to switch off lights for 9 minutes. This has apparently raised concerns that there would be problems to the power-grid, due ...
90 views

### How to prevent current and voltage fluctuations for loads connected in parallel to the same power supply?

I have a 12V dc power supply/battery supplying a class D audio amplifier, 12V dc linear actuator (controlled by raspberry pi through an h-bridge), LCD screen and LED light strip (Lighting intensity ...
340 views

### How to calculate maximum power when value of load resistance is unknown?

Once again same circuit and same voltage source / current source and resistances. However now I need to calculate the maximum power that is consumed by the RL. How do I do that, and most importantly ...
127 views

### How do I calculate load resistance?

I'm here with yet another problem. This time I can't figure out what the question wants. I've calculated the Thévenin equivalent, however I can't work out how I should calculate the RL. Is the load ...
57 views

### Load sensing relay/power switch/adapter which switches on when it detects some load on its input

Complete newbie here. I'm not using the right terms, so my apologies in advance. The problem is simple. I want my powered computer speakers (2.1) to turn off when the computer is turned off. I have ...
55 views

### Calibrate for an inaccurate 50 ohm load in a DIY Vector Network Analyser (VNA) based on a VSWR RF bridge

I have built a "DIY VNA" using a frequency generator, an SDR receiver, a RF Reflection Bridge and a 50 ohm load. This is used to measure "VSWR values" of antennas to see what frequencies they are ...