Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

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.

548 questions
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Choosing TRIAC snubber resistor for multi-purpose switching

I'm designing a circuit to switch a 240V AC load and haven't done a lot with AC power control before. I'm planning to use a Fairchild MC3043-M optically coupled TRIAC driver along with a BT138-600 NXP BT138-600 TRIAC. Referring to the following…
PeterJ
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Constant current, constant power and constant impedance loads

Ive been looking for information on constant power, constant current and constant impedance/resistance loads, there's some information about the constant current loads, but very little that really explain constant power and constant impedance. So…
S.s.
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Capacitor exploded - why?

Recently I had an explosion on my desk. A 220uF 25V electrolytic capacitor just blown up shortly after attaching a load. The high-level connection was: Phocos CA08 (solar charger controller) -> 12V-3.8V step-down -> uBlox Leon GSM modem. Because…
eltomek
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What is a load resistor?

I am not able to understand what a load resistor is and how does it relate with a load. Can anyone explain how the load resistor works and how is it different from the general resistor.
brewbot15
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What is capacitive loading? (Intuitive understanding)

I have read about capacitive loading, but what does it actually mean intuitively? I just asked this question so as to get an intuitive answer and also know what should I understand when one says that a load is capacitive. Question 1: When we have a…
user220456
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4 answers

Proper ways to disconnect ICs during low power states to avoid parasitic/backfeed supply

I’m working on a low-power battery-based AVR-based project that integrates a few different devices including a neopixel strip and an Adafruit pixie. When the overall device is quiescent, I’d like it to draw less than 0.1mA to maximize the LiPo…
Jeremy Gilbert
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Using TP4056 module to charge battery while load remains connected

I need a circuit that utilizes the tp4056 breakout board to power a NodeMCU ESP like so: tp4056 USB port connected: 18650 battery charging and NodeMCU running of USB tp4056 USB port not connected: NodeMCU running of 18650 battery The problem is…
WhiteSpin
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Is this normal Buck Regulator behaviour?

I recently got around to trying out buck regulators, my results weren't what I was expecting though. For one the ripple voltage seems a little high to me, It's about 800mV with no load and goes up to 4.5V with a constant 1A load. In fairness it's…
s3c
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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 " CRYSTAL, OSCILATOR, 32MHz, 10pF, 10PPM/+10PPM, ‐40DEGC/+85DEGC, SMD" It is for a MCU (ARM M3) and the datasheet has this sub-chapter: Here is the…
sven
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Can simple DC/DC linear regulators be used in parallel?

Can linear regulators such as the L7805CV (Rated at 5V output, 1A max) be used in parallel? I need to create 5V from 12V, but I need more than 1A, so a single regulator won't do. Can they just be wired up in parallel to achieve a higher maximum…
PMF
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Help needed optimising simple current limiting circuit

I have been experimenting with simulating current limiting circuits. I am trying to limit current to ~500mA given a fixed 4.8V source. I have started using a circuit like the one found on this wikipedia page ... I have made a simulation of this…
learnvst
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How to calculate suitable dummy load for a power-supply?

A beginner question - feel free to shoot me down I'm looking to modify a retired AT SMPS to drive my ham-radio. This is to be achieved by tying all the +12V wires together so the maximum amperage may be drawn from it. The SMPS lay unused for nearly…
Everyone
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Trying to determine the output of a RC-filter with load

I have a low pass filter like this: simulate this circuit – Schematic created using CircuitLab \$V_{\text{out}}\$ is measured right after \$R_1\$, which I suppose means that it is measured over the parallel part. \$R_2\$ is the load of the filter.…
rablentain
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How can I calculate the inductance of the primary of a transformer given a specific load on the secondary?

Inductance in the primary of a transformer decreases as the load on the secondary increases. How can I calculate the inductance of the primary coil? What if it was step up or one to one ratio?
dude
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Voltage regulator misbehaves under certain conditions

Okay guys, this one has me baffled. Take these two circuits: Typical stuff; Power in goes to the + rail, GND to the - rail. This is a 19V power supply going in. It goes through the voltage regulator (rated for up to 35V, 1 A), output pin goes…
cemulate
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