Questions tagged [component-failure]
For questions about what causes components to fail, how to prevent component failure, and component failure modes (e.g. fail open or fail short).
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PWM Dimming of a Low-Voltage DC Incandescent Filament (Thermal Shock?)
I plan on driving some Numitron tube filaments from an IV-16 tube (datasheet here). For ease of access I'll give the key specs here:
Nominal filament voltage: 3.15V
Max filament voltage (steady-state)...
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1
answer
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Swapping CANH and CANL kills my power converter
I got the first set of these CAN boards I designed and I plugged one into my test setup consisting of a two CAN dev boards as seen below. The first time I plugged my board in I didn't realize I had ...
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LM2576HVSX12NOPB blew up on 48V 10A PSU input
this is my schematic project for BLDC controller. the design have dc converter, mcu and gate driver. the dc converter is required to power the mcu and driver with 12 V and 5V. the problem is my dc ...
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Can diodes be tested successfully in situ? [closed]
I have tested a bunch of diodes in situ on a washing machine PCB. One comes back as expected with values of 0.6v and OL depending on testing direction. The rest show the same 0.6v in the expected ...
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Can a chip be damaged if it goes above operating temperature while running?
An image sensor I'm using has the following temperature spec:
Absolute Maximums:
Ambient storage Temperature Max: 125°C
Recommended Operating Conditions:
Stable image temperature Max: 50ºC
...
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What is this broken part/fuse?
This is a part that has been corroded from water contact. I appears to be a small connector with a ceramic base and two spade terminals. The wiring diagram for the item it's from identifies it as a ...
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Power supply board failure: could it have been cause by a misoriented triac?
I have this power supply board from a Honeywell HPA300 air filter that has a burned out triac (BT3) in this row of 4 side by side triacs (...
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High frequency sound on a PWM fan for some specific duty settings
So I got a used fan (specifically a Sanyo Denki 9s1212 series) and I discovered that under most duty settings (practically when not 100% or 0%) the fan emits a high frequency sound like this: (mind ...
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1
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SMPS Regulator keeps blowing
First Time for me posting here.
Recently I decided to perform a recap on an 20 y/o old SMPS, which is used in a digital mixer. The recap went without any complications. I followed the guide I found ...
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MOSFET driver blows out in half-bridge DC motor PWM controller
EDIT: I've redone the MOSFET circuit diagram; it now represents what my actual layout is. I wanted to spare myself redrawing the circuit but ended up confusing everything, I hope it's clearer now!
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Need help finding specs for RV1 & RV2 varistors on fried board [closed]
Power surge blew 6 appliances and am hoping I can repair some of the boards. I cannot identify blow varistors in RV1 & RV2 positions on Saeco IG 1.9.168.00_V04 board. Any help would be appreciated!...
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Functional discrepancy within PCBA batch
When manufacturing a small prototype batch of an embedded system at EMS I have detected different behavior between the units. All units work as expected, except that some units fail to operate same ...
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1
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How to design/build a relay-triggered "crowbar" circuit?
(This is a continuation of Failsafe for relay contact welding.)
I'm trying to wrap my head around something like a "crowbar" circuit, only, instead of tripping on over-voltage, it should ...
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What could have caused my power supply to fail?
I made a dual +/- 12 V power supply for synthesizer circuits using a schematic by Moritz Klein (image below). The input of the supply is from a 12 VAC transformer.
After soldering the circuit on a ...
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Failsafe circuit for a bistable latching solenoid
I am new to embedded circuits and working on a problem with which I need help.
I am using ESP32 soc for controlling a bistable valve using DRV8833 driver module. Please refer to this link for valve ...
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