Questions tagged [short-circuit]

An impedance that is non-zero during normal operation becoming very low

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49 views

Requirements for closed, open, and short circuits

In terms of understanding paths in a circuit, let's take a few example circuits: (1) Would the following circuit be considered closed or open (or something else) since it doesn't have a voltage ...
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81 views

Meaning of “short circuit current” in datasheets

This a general question regarding what should we understand when we see the term "short circuit current" in a given device datasheet. Does it always exactly mean the output current when we short the ...
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33 views

Which XT60 on battery?

What is the recommended plug on the battery? The male or the female XT60 and why? XT60 connector
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45 views

How the capacitor charges in this circuit?

I have been working on a kind of edge detector, and I would like to be guided about how the capacitor will charge in this circuit. when I don't have any transistor I could easily calculate the ...
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1answer
52 views

Where to fuse high voltage batteries connected in series?

I have modules of cells in series each with 48V. I wonder where is the right place to fuse the modules in series. (The current to trip the fuse is the same on every point). Version 1: simulate ...
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43 views

Understanding CFLs in Electrical Circuits

I wish to have a better understanding of how CFLs work in a electrical circuit like a home. A CFL broke a little towards the top when I touched it. I noticed it light up at the bottom and then made ...
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125 views

Why would doing the “outlet challenge” cause notable damage to outlet and wiring?

WARNING!!! WHAT "PRANKERS" IN THE VIDEO DO IS MOST LIKELY VERY DANGEROUS AND MAY CAUSE DEATH, INJURY, FIRE OR OTHER DAMAGES AND IT SHOULD NOT BE TRIED IN ANY ELECTRICAL SETUPS WHICH ARE NOT DESIGNED ...
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63 views

Why doesn't a short-circuit immediate consume all voltage?

If we assume a short circuit, with zero resistance (not even within the battery), would this 'infinite current' deplete all voltage within the battery? For example, if I "short" a 9V alkaline battery, ...
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104 views

Electronic Circuit Breaker

I want to protect from short circuit by using a miniature circuit breaker. But this has to be manually turn ON, when ever it is turned OFF. So I was thinking to make a electronic circuit breaker which ...
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5answers
3k views

5V LDO blowing up only when testing current draw

I have a circuit to power some 5-volt logic from a +24VDC source. It has some basic reverse-polarity protection and uses a TI 5VDC LDO. It all works great during normal operation however, when I use ...
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51 views

Broken Hyelec HY5003-2 lab bench power supply

I recently burned both channels of my Hyelec HY5003-2 power supply with an accidental short (the supply was in parallel mode and around 30V.) I tore it down and found that the power transistors were ...
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Could 48V arc across this small gap?

I have soldered two wires onto this Cree XHP 70.2 LED, tested it in a circuit, and everything works fine. I intend to wire four of these LEDs in series and drive them together at about 48V and 2.4A (...
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50 views

Short and Open Circuit Calculation

Suppose there is a ideal voltage source which can provide infinite power if that is needed in an ideal scenario. Now suppose a resister R is connected across it and the e.m.f is E. So by ohm's law the ...
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76 views

GaN FET short-circuit protection

From Texas Instruments snoaa15, which is an Application Report about overcurrent protection of GaN FETs, in the first page, you can read the following quote: Traditional approaches using current ...
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3answers
57 views

Current flowing in a short circuit with a voltage source

I want to calculate the current flowing in the node A of the following circuit: simulate this circuit – Schematic created using CircuitLab This can be approached in several ways. The tension ...
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3answers
39 views

voltage across low resistance and short circuit

simulate this circuit – Schematic created using CircuitLab The voltage across R ohm should be always V volts for every single value of R except R=0 and at that resistance the current through R ...
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1answer
73 views

Op-amp output and input shorted

Please excuse what may be a stupid question, since I don't have access to test gear. I'm obviously no expert, and trying to learn the behavior of op amps. What happens to an op amp (in my case, TL072) ...
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54 views

How to find I(t)?

so I'm trying to find the current I(t) passing through the node above the switch. I have already found the DC response of the RC circuit which is in the form of: so, after the switch closes a short ...
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1answer
43 views

Extension cord's power socket grounding pin soaked in cleaning agent sud, what is a proper way of cleaning?

I didn't really know what tags to use. Anyways, this might sound stupid, however I was cleaning up something above the extension cord which was laying on the ground, and while I pressed the wipe suds ...
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89 views

Help me to understand the working of induction cooker circuit

I am new to electronics So I need help to understand the working of the induction cooker circuit. I searched on the google but could not find the simple answer. Below is the attached circuit commonly ...
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5answers
3k views

High short circuit failure rate of aluminum electrolytic capacitors during the production processes

I have produced 1000 units of our new developed energy meter. Almost 20 aluminum electrolytic capacitors (2%) have failed short when we test them during the production processes. The Capacitor is a ...
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1answer
67 views

High Short-circuit protection for LiPo Battery

I will be using a LiPo battery for a project, and I want to make certain that I fully understand the safety features of the Protection Circuit Module included with the battery, so that I have a safe ...
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1answer
231 views

How I can solve this circuit with diodes?

I tried to solve this circuit but without success.. Also is there any current flowing trough D3? and how this isn't short circuit?
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85 views

How to find the short circuit element on electronic board easily

I have two Uster Tester ( this machine used at textile) cards. one is corrupted and the other is the same one that works. Trying to repair the corrupted card by performing comparison test. When I try ...
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1answer
60 views

Problem with 74HC76, silly mistake or possible fake?

I am a hobbyist and have been buying a few cheap ICs on AliExpress to play around with at home. I know that there is some risk involved in buying these but I seem to have had mostly good luck so far. ...
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56 views

Selecting a value for resistor to make initial capacitor voltage a certain amount

In the above question, I found the amount of R1 to be 31.6k (R1 = 31.6KΩ) and I worked out R2 in this way: 5 * (R1 / (R1 + R2)) * R2 (first calculate the current ...
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31 views

Burnt Power Jack connection point

New to computer repair and recently came into possession of an old laptop for free after the owner gave it it to me. Initial problem with it was the power jack and the battery, changed the battery ...
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110 views

How to suppress a short circuit to prevent fuses from blowing [duplicate]

I have a circuit that is modular and one of the modules involves interfacing from an external relay. Now this sub-module has a fuse set to blow a bit below what the main module's max current. (why ...
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53 views

How to limit the current of a short circuit

I will be turning a relay on from my circuit by sending a signal 500ms to 1000ms long, and i am trying to protect against poor wiring or faulty relay from the user that causes a short circuit on the ...
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1answer
65 views

Short Circuit Scenario to understand short circuits

I am trying to describe the best I can the scenario I came up with in order to try to understand a short circuit. Let’s say there is only one main circuit breaker and there are two outlets in the ...
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31 views

TP4056 and ST32F103C8T6 shorting after few uses

Complete schematic: Top part: Lower part: This is the circuit schematic, top part is sensor, bluetooth, microcontroller, oled and pins related all working from 3.3v coming from regulation of a ...
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1answer
59 views

Need help troubleshooting after short-circuit, with heaters and thermocouples

There was a short circuit in one of the furnace that I designed. Description of the furnace and its components: The furnace is a copper tube, with 1/2 inch thickness, and 10 equally spaced 1/4 inch ...
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39 views

Avoiding shorts when switching between bus lines with a mechanical switch

I've designed a circuit to choose between two 8-bit digital buses. I'm taking advantage of the fact that the 74AC540/541 chips have tristate outputs, so can enter into high impedance state to allow ...
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1answer
40 views

Capacitor Shorting in transformer circuit

I built the circuit shown in the link with 240v https://www.instructables.com/id/Variable-voltage-ignition-coil-power-supply/ It did not work (produceing no spark), as I believe my capacitor was ...
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1answer
127 views

Is there a simple short circuit protection available?

One of my little copy/paste projects died again (a 12V 1 A circuit - last time it died). Now it was a short that caused it. Is there a simple way of keeping my parts from burning? By simple I mean ...
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151 views

Using diodes for reverse polarity protection

I want to protect my circuit against reverse polarity, by simply adding two diodes in parallel between the + and - input cables. So if the polarity is reversed, the current will go through those ...
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22 views

Triac gate and T1 short circuit forever with inductive load

I am using MOC3042 with BT139 and snubber 390ohm/2W and 10nF/400V to on/off motor from microcontroller, I can't find data about the motor as it's an old one but it drives quite large shutter
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81 views

Protecting the op-amp against output short circuit current with a resistor

There is an operational amplifier LM258WYDT. The output of the operational amplifier will produce a voltage in the range from + 12V to -12V and generate a PWM signal. Datasheet: Short-circuits ...
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105 views

Reducing the circuit

I am high school boy, our teacher gave us circuit and we have to find out the equivalent resistance. . Our professor gave us idea that we can solve this question either by either superposition ...
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1answer
60 views

How can the dielectric constant of water be so high but water on electric devices can cause a short circuit? [closed]

Is it only the fact that pure water has a high dielectric constant and non-pure water i.e. the water that usually causes a short circuit is contaminated and it's the contamination mixture in the water ...
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184 views

Opamp output short circuit protection

I am trying to build a voltage generator 0-10V to feed the input of a PLC ADC card (for simulation purposes). The PLC card has an input impedance of 133k. I am thinking to use the circuit from the ...
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1answer
71 views

Storing solar panels in direct sun

What is the best way to store solar panels when not hooked to a charge controller in direct sun? I was thinking about hooking each panels pos and neg mc4 connectors to itself so it will not be ...
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Determine the total electric power of the circuit with 2 types of voltage?

When 3 lightbulb have an electric power of 60, 100, 150 respectively V= 220Voltz. Determine the electric power consumed for each lightbulb that are connected in series when the V=380Votlz I am ...
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57 views

Does melting microwires cause internal shorts

If you overheat a chip, you can melt the microwires attaching the wafer to the package. When this happens, can the melted microwires cause shorts between the pins of the chip, inside the package of ...
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95 views

Current Source and Short Circuit

let's consider this circuit: How can I analyze it? Which is the expression of the current in the short circuit? Is it correct to split the circuit in the following way (I always did it when there was ...
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1answer
79 views

How to power a nickel chromium wire to produce heat without burning the power adpapter

I want to build a toaster just for fun. I want to buy a nickel chromium wire to heat the toaster's plate. How to avoid burning my power adapter cuz the resistance is too low. I currently have a ...
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52 views

High Voltage shares ground, Problems?

I am having a problem with identifying why a high voltage part of my circuit broke the low voltage controller. To start, the basic premise of the circuit is to take a very accurate 0-10V DAC voltage(...
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71 views

LiPo short circut

I connected my LiPo battery (4S 1500 MAH 14.8V now 15.2V) to the charger that came in the set through the pins and there was a short circuit. I unplugged the charger immediately. The smell of burned ...
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109 views

Can an electrified wire ever be safe against bare skin?

This could sound ridiculous to someone with an ounce of experience, but I'm just getting started, so here we go ;) Full question is 3 parts... First, what is the lowest amperage needed to light an ...
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80 views

Definitions of elements, nodes, branches, loop, mesh for a network with short circuit

CONTEXT This question is intended to highlight the lack of precise definitions of basic circuit terminology that I have found. For example, consider the following definition of branch. "A ...

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