Questions tagged [lightning]

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1answer
171 views

Amount of light by an LED

I am supposed to use an light having the following specs. as described in the below statement. "A red light, equivalent in its luminescence to a 21 W light bulb is to be used." On an average how ...
4
votes
2answers
12k views

direct ZigBee communication with Philips Hue smart light bulbs

Philips Hue light bulbs use a Bridge(transmitter) to connect between your network and their smart lights via a ZigBee protocol called Light Link. Can you control the lights directly with your own ...
4
votes
2answers
625 views

Preventing Arduino from getting lightning strikes and protecting it

I want to use an Arduino as a weather station and I want to put it high up in a tree. It should be independent and powered by solar panels. This is where the problem starts. Lightning strikes occur ...
2
votes
2answers
10k views

Calculate number of photons of a light source given the lumen and the color spectrum [closed]

Is there any program that given the lumen and the colour spectrum (relative intensity at any wavelength) of a light source and it outputs the total amount of photons per wavelength?
0
votes
2answers
180 views

Induction loop for catching lightning?

Recent thunderstorm, and a big overhead cloud to cloud lightning flash. Coincident with it, sparks jumped from a metal chair in the house. Would it be possible to get a spark from a loop of cable ...
1
vote
1answer
510 views

Can a metal pipe shield wiring against EMP during a nearby lightning strike?

I have a building which regularly experiences nearby lightning strikes. The backup diesel generator is located 10 meters away from the building. Can induced currents from the EMP be reduced within the ...
3
votes
3answers
675 views

Creating an isolated power supply to prevent effects of lightning

Transformers isolate the load completely from the primary power source. Does that mean that I can connect two or more transformers one after the other and expect my Linear Power Supply to have better ...
5
votes
2answers
547 views

Protecting a tethered floating device from Lightning strikes

I am building a device, current as a proof of concept, but I would like to have it in place for a long period of time (over a year) with minimal maintenance. The device is powered by an array of ...
0
votes
1answer
154 views

What would happen to the wires if a lightning struck them? [closed]

I've got a link to this video of a lightning striking wiring between two houses in a city: http://www.youtube.com/watch?v=bLPFeW40Xrc I wonder if the wires were melted by the current (as commenters ...
13
votes
3answers
56k views

Why do thunderstorms knock out power?

It isn't like lightning strikes the wires. And surely the whole apparatus is designed to be water-proof. So what is it that causes power outages during thunderstorms?