Questions tagged [lightning]

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Reduce risk of harm from electric storm in hot tub in covered area [migrated]

TL;DR we have a hot tub in a covered area outside and want to take measures to mitigate against harm to us or the electrics if a storm strikes us unawares. (We’d get straight out of course.) What ...
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1answer
58 views

How does common mode voltage surges couple in wires

From doing some research and with the assistance of a user on this platform, I would like to know if my understanding of this concept is correct. Please note this post is an add-on to this post. A ...
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1answer
66 views

What's the difference between a thousand 0.2W LED's and two-hundred 1W LED's?

1000 x 0.2W = 200W 200 x 1.0W = 200W What's the difference in the light output over a given area, in terms of PAR, PPFD, PPF? I grow plants indoors under LED panels. People in this industry say to use ...
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4answers
149 views

Why faulty, old CRT TV produce ozone

I have an old CRT TV which had to be switched ON for half an hour or so for the picture to stop being blurry and be 'viewable'. During this initial warm-up time there was a 'static' like noise coming ...
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3answers
76 views

How do I test grounding/lightning protection?

I manage IT for several clients in Central Florida, where we have quite a lot of lightning (the most in the U.S.). I have one client that has trouble keeping electronic devices alive. We have replaced ...
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1answer
71 views

Will adding a resistive load to a lighting circuit stop my electronic dimmer from leaking current to my LEDs?

I changed my bedroom lights yesterday for 220V 7W dimmable LED lights. My bedroom dimmer is an electronic type (LightwaveRF). In the pitch black, last night, I could see the lights faintly glowing/...
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1answer
51 views

Protecting RPi against lightning and high voltage

I'm making a remote weather station with a Raspberry Pi 4 and a few sensors. Problem 1: the anemometer is held on a iron rod (was already there, can't change), dangerously exposed to lightnings. ...
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2answers
258 views

ESD protection during lightning storms

I'm new to electronics, and I'm currently building my electronics area. Let's say that I have an ESD bench mount drilled into my wooden workbench, and this ESD bench mount is then connected to the &...
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5answers
3k views

Can lightning strike into the phone line damage electronics in the house through the ADSL modem?

I was always wondering about the following: If lightning strikes directly into the phone line outdoors, can the excess power coming from the phone line jump over the switching power supply of the ADSL ...
3
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1answer
87 views

Protecting circuit input against lightning - how to put all the pieces together?

I am designing a single wire (ground return) telephone for use in our hobby caving expeditions, starting out from a well known and successful design called Michiephone (http://speleonics.com.au/...
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3answers
657 views

The chance of a lightning strike - reduced or increased?

If I connect the receiver and TV body to the earth, does it reduce or increase the chance of lightning strikes the dish antenna?
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0answers
16 views

Making a USB-C to lightning cable using 2.0 legacy, works from hub, gives 2.9V from PD compatible charger. What to look for?

I've created a USB-C to lightning cable using the USB-C to USB-A 2.0 spec as a guide. I've followed the guidelines in the spec, but can't seem to get it to work as intended. When I connect it to a ...
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2answers
107 views

High Voltage and Low Charge - Analogy (ESD & Lightning)

How can something have high voltage but low charge? Can anyone provide an analogy for this? I was going through the ESD topics and read the ESD events usually have high voltage but have low charge? ...
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4answers
89 views

Why are modern telephone lightning arrestors less prone to (rectification) RFI problems than old ones?

I was reading about telephone lightning arrestors in my ARRL RFI Book (first edition, copyright 1998), in chapter 9 "Telephone RFI" (by Pete Krieger, previously WA8KZH, now K8COM) and on page 9.6, the ...
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0answers
35 views

lightning protection on LAN cables indirect strike crowbar VS isolation

i am using a crowbar lightning protection system we built 10 years back for LAN on our own devices for the mine industry. it works very well. at that time i decided to use TVS bidirectional 18v , GDS ...
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2answers
49 views

Can a Surge Travel on a Residential House's Wiring that is higher than 6kV and 3kA?

IEEE has stated that the highest voltage and amperage that a surge can travel on home wiring is 6kV and 3kA. Anything higher, the wiring would melt. If this is so, how does a surge from direct or ...
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0answers
35 views

Using current divider to see how much current goes inside the plane when lightning strike

I am working on a project that requires me to understand how engineers do current analysis. The aircraft has a metallic body which provides a path for lightning when it strikes but what if there is an ...
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1answer
249 views

I am failing to understand the difference in Impulse Sparkover voltage vs DC Sparkover voltage of GDT

Lets say I want to use a Gas Discharge tube for indirect lightning protection, and I have a tvs diode in parallel with GDT. Since this is indirect lightning and has a fast waveform, should the tvs ...
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0answers
26 views

How do I calculation to see if Thyristor complies with DO-160G indirect lightning protection

I have been working with TVS diode and found that the capacitance of tvs diode is large; therefore, I will not be able to use tvs diode. Thyristor, on the other hand, has low capacitance for high ...
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1answer
227 views

DO-160 indirect lightning requirement confusion

I am looking at many tvs diode online, and I wanted to know how to calculate to check if it complies with DO-160 indirect lightning surge protection. For DO-160, there are Waveform 3, 4, 5A&B, ...
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1answer
118 views

Lightning Surge Protector that complies with DO-160. Indirect lightning waveform, Gas Discharge tube or MOV in parallel with tvs

Would it be wise to put Gas discharge tube in parallel with tvs diode? OR Would it be better to put MOV in parallel with tvs diode? Also when deciding on tvs diode, how does indirect lightning ...
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1answer
438 views

A TVS for lightning surge protection

A camera will be mounted outside and powered via POE to Aruba 2540 network switch. I don't want indirect lightning surge to travel into the network switch. I don't care if the camera gets destroyed. ...
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1answer
86 views

Best sensor to measure light intensity in open room

I am working on a project to understand how robot localization is effected by light levels. I am wanting to build a circuit which can be mounted on a small robot near the camera and can determine lux ...
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1answer
131 views

Supercapacitor based lightning-harvester [closed]

Could lightning discharges be harvested and stored in supercapacitor banks? Could supercapacitors withstand and collect lightning? Lightning usually lasts for about 10 micro seconds and reaches ...
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4answers
930 views

Is it possible to measure lightning discharges as Nikola Tesla? [closed]

Nikola Tesla stated in his patent, Art of Transmitting Electrical Energy Through Natural Medium, that he used sensitive instruments to measure lightning discharges: In the course of certain ...
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1answer
270 views

Lightning protection for TV Antenna

I live in an area with frequent lightning strikes. Occasionally people get killed due to those - specially when strikes enter house through TV antenna cables. My house is quite tall and seems to be ...
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1answer
35 views

Replacing lightning connector with usb-c connector in lightning earphones [closed]

I have a lightning earphones, Sennheiser ambeo smart headset. https://en-us.sennheiser.com/finalstop The cables are yellowing, and I wanted to replace them, also I got tired of using this on my ...
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0answers
310 views

Earthing for Satellite Dish

A friend who is an electrical engineer (heavy current) told me to earth my satellite dish and its fixing pole against lightning, using a thick copper cable (6 sq.mm) and an earth spike. He also said ...
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3answers
283 views

Voltage, inductance & lightning in a length of wire

I initially got the idea after watching the famous Mike Holt video on grounding. https://www.youtube.com/watch?time_continue=138&v=mpgAVE4UwFw Mike warns that longer wires to ground rods can ...
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2answers
254 views

Does a ground strap protect my car from a lightning strike?

I was wondering if the ground strap can also protect the electrical/electronic parts of a car when a lightning strikes it.
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1answer
437 views

Is 3.5mm jack to female Apple Lightning adapter technically possible?

I couldn't find a trustworthy source for whether Apple EarPods are digital or analog, but I'm pretty sure it is digital as most teardowns show a chip on it that might be a DAC. Should this make ...
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1answer
72 views

Lightning protection system [closed]

When I have a lightning protection system installed on a building roof top , what is the best way to bond the electrical equipment on the roof? Is it ok to directly bond it to the down counductor of ...
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3answers
553 views

Can lightning damage electronics via a ground connection?

Often when we think of a lightning transient, the idea is that the lightning strikes a power line and propagates through the hot/neutral or 3 wires of 3-phase system. There is also induced current ...
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2answers
55 views

How does the chassis ground on an automobile protect against lightning

How does the chassis neutralize the excess of electrons from a lightning strike?
6
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1answer
139 views

Sparks on grounded metal bodies on lighting strikes in the nearby (two miles)

I have a strange phenomenon in our mountain cabin, on the Italian alps: lightning strike on the nearby (not so near: < 2 miles) causes audible / visible sparks on: electric / fire wood water ...
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1answer
75 views

A question about lightning protection for a sensor mounted outdoors

There is an ultrasonic-windsensor which will be mounted on a bridge in winter. Maybe several of them. It seems like for outdoor use this device should be earth grounded(probably through mains earth? ...
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2answers
861 views

Why does lightning hit a plane when it's not grounded?

The title is the question. Is it something to do with batteries on a plane? I’ve tried Google but all the listings are “what happens when lightning hits a plane” So why does it happen I want to know?...
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2answers
6k views

How to make the lightning port of iphone output 5V power? like OTG on android phones [closed]

How to make the lightning port of iPhone output 5V power? How to make the lightning port of iPhone output 5V power? Just like the android phone, if I connect the ID pin to the ground then the phone ...
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1answer
172 views

Question about ESD wristband and lightning

as far as I know all ESD wristband's ground connection has an 1M ohm resistor built in for safety. So what would happen if I am working on lab wearing ESD wristband which is connected to the home ...
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1answer
58 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 ...
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2answers
317 views

Identification of a part on a power line's lightning arrester

I recently spotted an arrangement of wires on a lightning arrester on top of a power line. The power line is IIRC a 110 kV, 16.7 Hz, two phase line for railway systems. The lightning arrester is of ...
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2answers
555 views

Automatic cut mains power on a thunderstorm

I am a software engineer with only a basic experience with electric/electronic engineering. I live in a rural area subject to thunderstorms, my house is the end of the line from street poles. It's ...
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2answers
303 views

How does a neutral wire add any protection from near-by lightning strike

As an amateur radio operator for 60 years now I have been aware that a major worry vis-a-vis lightning is not so much the very rare "direct hit" that blows up the house, but the far more common "near ...
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2answers
307 views

Lightning protection for underground loudspeaker wires

I am tasked with running a loudspeaker to a remote building. The total run length is around 275 feet, with the outdoor portion being around 165 feet. The cable is Cat5e 24awg unshielded, silicone ...
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2answers
113 views

detection of dc pulse

following is a pulse which i obtained from a circuit and i want to get a count when the pulse is initiated. My circuit is to detect a lightning and i obtain this pulse in our high voltage laboratory ...
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2answers
5k views

How to add lightning protection on a PCB?

Currently, I have the PCB design ready, and I want to add lightning protection to the PCB. Can someone suggest a good, low cost solution for it? I am new to adding lightning protection. One of the ...
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2answers
389 views

Lightning Rod Hack By Using Satellite Dish

Our condos' rooftops don't have lightning rods per se, but they do have satellite dishes and AC units mounted there as well. Would these, if properly grounded (and these should be) act as lightning ...
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1answer
44 views

Radio Noise from Storm

I drove through a Wyoming thunderstorm today. Just for fun, I set my AM car radio to the top end of the AM broadcast band where there was no station audible. Sure enough, I heard the lightning ...
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3answers
161 views

Lightning detection

I am planning to build a device that has a capability of early detection of a lightning. Also we want to measure the magnitude of the lightning and can anyone suggest a way to measure the magnitude of ...
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3answers
2k views

What could happen if a lightning strikes a car with a battery connected to the chassis ?

I was wondering today what could possibly happen if a lightning strikes my van where I have a 12V battery negative connected to the chassis. Could that destroy the battery or start a fire? In order ...