Questions tagged [damage]

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1answer
56 views

LM2776 gets damaged after some time

It is almost the reference design from the DS. The only differences are those quite large inductances I had to add to remove the noise. The neg voltage is used to power RR OPamps feeding the ADC the ...
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2answers
80 views

Mains AC Reverse Polarity - Has this damaged my fridge/freezer PCB? [closed]

In the UK, I had a smart meter installed a few weeks ago. My 4 year old Panasonic fridge/freezer (NR-B53VW2-WB) was working fine before the electric meter switch. After the install, after the engineer ...
3
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1answer
66 views

Can a solar inverter be damaged if installed capacity is much larger than demand?

I had a dispute with my fellow. In his opinion, a power inverter can be damaged if the load is much lower (e.g 100W) than installed capacity (e.g. 10kW) of the solar system. I am of the opinion that ...
1
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1answer
62 views

How to generate heat using a battery and a wire

If i connect the positive and the negative terminal of the battery with a wire, the wire will turn red and generate heat.This creates a short circuit.This can damage or explode the battery?Is there ...
1
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1answer
107 views

Arduino died when grounds got disconnected

Alright bear with me since English is not my first language and it's my first time posting here. So I was using my Arduino Nano (not genuine) to drive a single phase full bridge rectifier. The ...
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1answer
61 views

Why are there air(?) bubbles within my LCD? [closed]

Photos: https://photos.app.goo.gl/BvqLVYkMBB7RjaMU7 (Nexus 9 Android tablet) My daughter's tablet is enclosed in a full-body case, so it's fairly well protected. Still, somehow, at some point I ...
15
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3answers
4k views

Is this resistor leaking? If so, is it a concern?

I found this resistor on the control board of an old Whirpool washing machine: Is that fluid leaking from the resistor? (Why would that happen?) Could it be something like stray epoxy or a chemical ...
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0answers
68 views

How to clean circuit damaged by bleach?

I was trying to remove stains on a fiber optic party tie using bleach, however it seems a small quantity has leaked inside the controller overnight, causing some corrosion and preventing it from ...
4
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2answers
383 views

How long can equipment go unused before powering up runs the risk of damage?

I have an older solid state radio transceiver I want to power up but I understand that electrolytic capacitors loose their function after a long time of non-use. There are articles about reforming ...
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0answers
40 views

Can a transformer damage a function generator?

I was playing around with a Siglent SDG 1032X and a small transformer, that I have directly connected to the generator's output, when I have reached the over voltage protection: I have accidentally ...
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0answers
39 views

Ignition coil testing

Will ignition coil internal carbon tracking/damage be evident through conventional ignition coil tests? eg multimeter, 12v battery arcing
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0answers
41 views

Current transformer damage

Can a current transformer be damaged with an open secondary coil even if it is powered with an extremely low current? e.g a small spark gap is made, though no plasma stream is created due to the ...
0
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1answer
80 views

Increased current consumption of micro-power devices

I've been working with microwatt and nanowatt power consumption devices for a while and I've mentioned that sometimes, due to unknown reason, current consumption increases in order of magnitude. ...
4
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3answers
5k views

Bad effects of coiling electrical cables [duplicate]

I have a desktop computer and a lot of external hard disk cases. I coiled all cables to make them organized and easy to clean. But an electrician told me; if you are using a cable, coiling (wrapping) ...
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1answer
65 views

Correlation EMF / DNA

What is the current state of independent (of producers) studies about the correlation between EMF (with particular reference to mobile devices) and interruption of human DNA? Are the declared SAR by ...
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2answers
126 views

Negative gate SCR

I've accidentally supplied the gate of an high power phase control thyristor (Vdrm=5200V and It(rms)=6500A) with a negative current (about two times the trigger current and four times the trigger ...
3
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0answers
175 views

Gate of a transistor and mosfet damaged

In my schematic, I found that the base of transistor Q7 (2n2222) was damaged. I tried to replace it with a BS170 MOSFET, and the same thing happened where the gate was damaged. The microcontroller ...
5
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4answers
5k views

Is a capacitor bad when it looks like this?

Hello I am new to the electronics field. I am looking inside of one of my synthesizers and I see some capacitors (I think they are Mylar, correct me if I'm wrong) that look like this. I know it is a ...
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1answer
68 views

Can parallel addition of a bigger capacitor damage the smaller one?

I have connected big capacitors to the speakers to increase the bass. Now, after months of using, I notice that one of the speakers sounds 2x low. I ejected those big capacitors, still the same. I don'...
0
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1answer
76 views

Identifying damaged, burnt out, or missing components [closed]

Is it possible to deduce the identity of damaged, burnt out, or otherwise missing components (or suitable substitutes)? For example, below is the PCB of a 2 speed electric razor I've disassembled. ...
14
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5answers
5k views

How to solder this pin

A customer that has bought this device years ago somehow managed to fry this IC and he tried to replace it himself. That did not work out though and he messed up the track for good. He sent it to us ...
0
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2answers
83 views

Can Micro-controller bear the voltage at its pins more than its rated voltage?

I have a micro-controller, for which i have a datasheet specifying the ac/dc characteristics of that mcu. But in this datasheet there are no absolute maximum ratings only the operating conditions are ...
0
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1answer
47 views

Drawing power from only one phase of a 3 phase alternator

Note: I am busy learning about 3 phase alternators. A lot of my understanding is theory so I'm running through scenario's for better understanding. Scenario: Lets say we have a 2KW-220V-50Hz 3 phase ...
0
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1answer
152 views

Can you identify these two SMD components? [closed]

A couple of components get knocked off by some loose elements during the shipping of some equipment. I'd like to identify the elements and solder in some replacement. My guesses: left one is a 270uF ...
3
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1answer
148 views

MOSFET mechanism of failure: was it the heat?

I am debugging a failed MOSFET (IRF6662), and in the process of doing so, am having difficulty understanding fully the thermal behaviour of the FETs. Two FETs used for DC switching both failed short ...
0
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1answer
49 views

Are there disadvantages to this method of testing building wiring after a lightning strike?

A lightning strike can damage wiring in a building. Specifically it can damage the insulation on the conductors, resulting in arcing and fire, either immediately or some time after the strike. I've ...
3
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1answer
68 views

Shipping & Handling Electronics & Electro-mechanical parts

What are common packaging(Shipping & Handling) guidelines (specs/stds) for Electronics & Electro-mechanical parts? Currently, working on adding onto our current generic guidelines for ...
2
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0answers
55 views

Which one is more damaging? overvoltage or undervoltage? [duplicate]

It is not easy to get the exact supply voltage required by loads. The supply is usually either a little bit higher or lower than desired. It is known that both over & under voltage can ...
5
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2answers
530 views

How exactly is an LCD damaged by DC current?

LCD displays are driven by AC waveforms. I've seen many references referring to permanently damaging them with DC current. When exposed to DC, LCD's fail and conduct excessive current. My question is: ...
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0answers
73 views

What happened to my Ni-MH battery?

I made a little custom data logger. It's powered by a rechargeable AA Ni-MH battery. Typically, it lasts about 2 weeks on one battery. Then it uses a low voltage cutoff to sound a low battery alert,...
1
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0answers
85 views

Help identifying IC damaged by wrong voltage

I accidentally fried an IC when switching out a power supply; sent 12V instead of 5V. I've been trying to find some information on this drive, a Corsair M500 240GB, (CT240M500SSD1) - maybe a datasheet,...
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2answers
3k views

Is it dangerous to continue to remove a slightly punctured phone battery?

I have been trying to replace the phone screen on a Galaxy S7, and therefore had to remove the battery in the process. While doing so, I saw a tiny spark and felt a weird smell. I can't see any damage ...
0
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1answer
79 views

(How) can I save my components after ESD accident? [closed]

In winter time I am often charged with electricity and frequently encounter esd during the days. I know I should have esd protection when working with electric components, but now it is too late: I ...
1
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1answer
589 views

Covering electronic device with plastic film wrap

I hope someone can help here with an electronics issue I have. I am currently shipping an electronics device, an audio reel to reel to be exact. It was suggested that I wrap it in plastic film wrap, ...
2
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1answer
117 views

Why a damaged LED was acting like a weird memory cell?

I remember playing with signal LEDs and observing what happens when I misuse them, and one particular LED behaved very strangely, as if it were stateful. Using a drained 9V battery (that can only ...
0
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2answers
128 views

A situation regarding AVR and bad power grid voltage [closed]

I have a question regarding the following situation: Some poultry farm has taken some serious losses when their diesel generator died, only being able to provide backup for 45 minutes and killing ...
0
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1answer
150 views

Hard drive won't power on, is this the reason why? [closed]

I have a somewhat old, but functional (used to be, actually) hard drive, model Samsung HD103SJ, which I use for backup purposes. This means this is not a fixed unit. Since a few weeks ago when I ...
0
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1answer
174 views

Dirty electricity [closed]

In the book "Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future" by Ashlee Vance it is mentioned that at Elon's house there was a problem with "dirty electricity" that was causing devices ...
2
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3answers
223 views

Damaged Solder Joint?

So I bought a SEGA CD off ebay and everything was fine until I decided that the duct tape that was holding the battery is was a poor substitute for a battery holder. So I took my Model 1 apart begun ...
4
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4answers
2k views

What actually happens when both 1 input is given in RS flip flop circuit (physical change)?

This question is somewhat similar to: Why is S=1, R=1 state forbidden in RS flip flop? But I am asking what actually happens if both 1 input is given forcefully in R and S terminal of flip flop ...
3
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1answer
125 views

Protection from leaking capacitors - store upside down?

I collect many vintage computers. Most of them use through-hole capacitors, some axial, etc. Some also use SMD caps. When I store my computers, I always remove any batteries. Anyway, I was ...
0
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1answer
70 views

Any side effects when substituting bigger capacity battery in place of smaller capacity?

I have a car key fob whose batteries recently died. The coin slot says it accepts two cr2025 coin cell batteries. But I was thinking, since a majority of coin cell batteries run at 3v, I should be ...
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0answers
156 views

Piezo element lifespan in vibration environment

Can anybody guess or does anyone know what lifespan can be expected of this piezoelectric sensor - https://www.sparkfun.com/products/10293 - with a weight glued to it and used inside a passenger ...
0
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1answer
132 views

Is the voltage across a turned off transistor a problem?

I was studying some stuff here and I came across a question that I couldn't find on the internet. I created this circuit for demonstrating my problem: The transistor Q6 is a normal NPN transistor, ...
0
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1answer
264 views

X-acto knife with soldering iron (Durable?) [closed]

I know many people who like to use an x-acto knife on their soldering iron. They use it to cut through plastic enclosures for their products. But the question is, how long will the x-acto knife last ...
0
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1answer
102 views

Will reed switches break in various weather conditions

I will be using an OKI ORD-9216 14mm reed switch in my mailbox, which is outside of my house. Below is a picture of a reed switch. I am worried to whether the reed switch's glass will crack due to ...
0
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1answer
430 views

Would connecting an amplified sound output to a line level input(aux cable) affect my car's stereo speakers negatively? [closed]

My Bluetooth module has a built in amplifier and I connected the outputs to an aux cable and would like to plug it into my car radio, which also has a built in amplifier... I didn't think this was a ...
0
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1answer
74 views

Can a low current device be damaged by a high current device when in parallel?

Well, the title of this question tells it all, but repeat it here: "Can a low current device be damaged by a high current device when in parallel?" Came along this article: http://www.embedded.com/...
2
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2answers
309 views

How can removing a piezoelectric speaker/buzzer damage a circuit?

According to a comment at DIY stackexchange: "...disconnecting a passive piezo speaker that is fed via a transformer could theoretically upset or even damage the electronics feeding it." How could ...
2
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6answers
1k views

Outcome when logic output of IC shorts to VCC

I wish to know how to determine what happens when the logic output of an IC becomes shorted to VCC (preferably without actually having to short it). I realize that there are a plethora of ICs out ...