Questions tagged [damage]
The damage tag has no usage guidance.
0
votes
0answers
62 views
Ignition coil transformer [duplicate]
Urgent! Need answers ASAP!
I recently built a HV power supply, as per the link (using a pencil ignition coil). However, I used a capacitor of around 5nf, which meant the supply did not work. The ...
0
votes
1answer
76 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
votes
3answers
3k 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) ...
0
votes
1answer
49 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 ...
0
votes
2answers
94 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
votes
0answers
135 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
votes
4answers
4k 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 ...
0
votes
1answer
62 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
votes
1answer
55 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
votes
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
votes
2answers
72 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
votes
1answer
37 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
votes
1answer
151 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
votes
1answer
105 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
votes
1answer
44 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
votes
1answer
66 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
votes
0answers
52 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
votes
2answers
311 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: ...
0
votes
0answers
71 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
vote
0answers
72 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,...
0
votes
2answers
2k 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
votes
1answer
76 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
vote
1answer
408 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
votes
1answer
111 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
votes
2answers
108 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
votes
1answer
128 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
votes
1answer
157 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
votes
3answers
182 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 ...
3
votes
4answers
1k 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 ...
2
votes
1answer
82 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
votes
1answer
69 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 ...
0
votes
0answers
123 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
votes
1answer
103 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
votes
1answer
193 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
votes
1answer
98 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
votes
1answer
327 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
votes
1answer
70 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
votes
2answers
260 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 ...
3
votes
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 ...
0
votes
1answer
64 views
Can NiMH type AA battery charger be used for other types like AAA, C, or D (all NiMH)? [closed]
As the title states, I would like to know if a battery charger for AA NiMH batteries could be used to charge also AAA, C and D battery types (all of which also of NiMH type).
I am aware of that ...
0
votes
3answers
304 views
UV intensity behaving oddly with ML8511 UV Sensor
I am using the ML8511 UV sensor: https://learn.sparkfun.com/tutorials/ml ... -guide/all
The sensor outputs a number that represents UV irradiance (intensity) in mW/(cm squared).
However, whenever I ...
0
votes
1answer
293 views
Does this look like burn damage [closed]
I had my plumber change the PCB of my boiler last year. Last week it stopped working and I tried to troubleshoot the problem. The circuit board just doesn't show any sign of life, the ON LED doesn't ...
1
vote
1answer
113 views
Arduino: Did I damage analog joystick clicker by using analog instead of digital input?
I am using a thumb joystick for Arduino UNO, trying to work with it.
There are x and y values that I get with analog input <...
0
votes
1answer
198 views
Can faulty USB 3.0 device break USB 3.0 circuit in my computer? [closed]
can a faulty USB 3.0 hub with Ethernet port break USB 3.0 circuit in a laptop so that only USB 2.0 in those USB 3.0 ports works after that? Consider no device connected to the USB hub, only Ethernet ...
1
vote
1answer
420 views
Will a 24/7 plugged-in power cable kill my laptop's battery? [closed]
I'm using a Lenovo Y50-70 and Conversation mode is always turned on (plugged-in, not charging mode).
Specifically, my question is: Will it damage the battery (or the laptop) if I leave the power ...
0
votes
1answer
114 views
Can a digital meter be damaged when reading resistance but connected to AC voltage
While testing with multimeter like a fluke 177 or fluke 334 clam meter in ohms range, if it is connect to ac voltage up to 50 volts, does it damage the multimeter?
1
vote
0answers
67 views
Damaged Switching Regulator
I am working on turning on a board of mine on which I am attempting to use a TI TPS563208 switching regulator. I believe I have followed the typical application in implementing this regulator in my ...
0
votes
1answer
187 views
Power Supply Response to Sinking Current/Overvoltage
Please consider the following circuit where voltage sources V1 and V2 are regulated linear DC power supplies:
From the simulation V1 will sink 2.5A of current provided by V2.
Questions: What will ...
3
votes
1answer
223 views
Will quickly switching polarity on a peltier damage it?
I am experimenting with different ways to heat up and cool down a peltier to a specific setpoint. Heating up the peltier to a setpoint using a PID has been relatively simple, and right now I am ...
2
votes
4answers
2k views
Can part of Integrated Circuit be damaged from heat gun usage?
I tried to re-use a costly Integrated circuit which includes dual port ram inside.
I removed it from unused previous board by carefully using heat gun.
The problem is that the other part of the ram ...
