Questions tagged [protection]
Ancillary circuitry that protects the main circuitry in case of a fault. Examples of faults protected against are: overvoltage, ESD, overheating, and overloading (too high of a current draw). In some cases the protection circuitry is sacrificial, being destroyed or degraded in the act of protecting.
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Snubber circuit protection
I am trying to understand how to implement snubber circuit protection as I have seen different circuit diagrams, I am lost.
Image source: Homemade Circuit Projects - Prevent Relay Arcing using RC ...
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What is the best way to mitigate the spark when a PCB is connected to power?
I'm designing a moderately powerful motor controller (integrated into a product). The board runs on 24V and has a 100uF electrolytic input cap, as well as 2 10uF ceramics near the switcher.
Whenever I ...
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Does ESD protection cause voltage leakage?
I have a this schematic for powering ESP32 over the usb and communicate PC with usb interface. It works perfect. But there is a interesting error. while I am powering ESP32 with Lipo battery (In case ...
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Will relays benefit from protection in form of a flyback diode?
If an inductive DC load is controlled via a relay, would that relay need or benefit from a flyback diode for protection from the loads off switching voltage spikes?
Note that this is not about a diode ...
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Correct way of optical input EMC protection
I tried to find an answer online, but didn't find anything that would make my doubt go away.
The thing is: when you want to protect any input, that is referenced to ground, you use ground-referenced ...
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Rating of circuit breaker for protection
This circuit breaker is rated as 12V-48V 100A and I have to use this circuit breaker between additional alternator (24V 100A) in my vehicle and additional battery bank to provide overcurrent/short ...
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How to predict the voltage drop due to a fuse?
My device runs from a USB supply, typical 5V, current typically 20mA, never beyond 100mA.
I want to add a fuse. The JFC0402-0500FS claims rated current 0.50A (perfect for this application) and a ...
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Does a modern voltage regulator provide reverse polarity protection and other protections?
I'm powering my circuit from 5V USB. Since USB is already regulated, I don't need a voltage regulator.
Will adding a modern regulator like L78M05C offer protection (besides regulation)? Concerns:
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Measuring capacitance with NE555 in astable mode
I have one problem with my project. I trying to measure capacitance with NE555, but i have problem with protection.
In this schemeatic instead of a capacitor, I have put connection socket 01x02 for ...
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Digital Input Voltage range selection
I am designing 24V industrial shields with 4 channel Digital Inputs. the digital inputs voltage range shall be set by 1P3T switch wherein the switch shall be actuated between 3 voltage ranges of 0-24V,...
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Protecting parallel 18650 cells
My son is doing an Eagle project where he is creating a solar charged LED light set up using two 18650 cells in parallel. We are working to ensure they are safely protected. From the research we have ...
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Ethernet PHY ESD protection, difference in components
I'm using a Würth Elektronik 7498210220A jack (datasheet) and I need to add ESD protection to TD and RD lines of this Ethernet connector (with integrated magnetics).
Application of this Ethernet ...
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2S Li-ion charger+protection with reverse protection
I'm designing a device powered by two Li-ions in series and I'm struggling with the charging and protection of the batteries. One of the requirements is to avoid battery packs, the individual cells ...
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Why does AS3001:2008 Transportable Structures explicitly deny a separate earthing electrode?
As the title says, if a generator is providing a TNS earthing system connected to a transportable structure through a detachable connection, why does AS3001 state:
Isolation of the protective earth ...
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TN-S Earthing parallel return paths when multiple MEN links
I have a bit-of a unique situation. I have a generator which is running a TN-S earthing system. It is powering demountable offices.
I assume that all sub circuits would have RCDs in the demountable, ...
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