Home lighting: 12v or 220v ???

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Exnihiloest
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Re: Home lighting: 12v or 220v ???




by Exnihiloest » 23/01/20, 10:53

plasmanu wrote:Very well. But the intensity square is for very old school textbooks from the XNUMXth century.
We are in the XNUMXst now.
I imagine this system in the USA. It's 50% of not lost for nothing, given the distances

lol
It's a joke ?
Is Einstein's relativity obsolete because it is more than a century old?
Is the electromagnetism of physics with Maxwell's equations no longer valid today?
It will have to be said to the ingés who use only that to create the whole electrical and electronic environment which surrounds us today.
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Re: Home lighting: 12v or 220v ???




by Exnihiloest » 23/01/20, 10:58

izentrop wrote:... IGBTs, a whole package in multi-levels ...

Always impressive power electronics. And electronics in general. Even when you're in the game, you realize after years that the industry has created components with characteristics that you couldn't even dream of 20 years ago.

Tinkers with their Tesla coil only have to get dressed

The poor man's THT, but still, it has a face:


I love this kind of uninhibited and positive youngster. With ecology, we forget that humans also need the superfluous.
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Re: Home lighting: 12v or 220v ???




by plasmanu » 23/01/20, 11:24

It was U = R x I
Then the diode
Now we engrave at 7 nanometers
And the semiconductor touches the divine (almost)

So 3,7v 12V 110V 230V whatever
But 35A on a very small 3,7V battery it heats a chouia
IMG_20200123_112658.jpg
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Re: Home lighting: 12v or 220v ???




by GuyGadebois » 23/01/20, 12:15

Exnihiloest wrote:I love this kind of uninhibited and positive youngster. With ecology, we forget that humans also need the superfluous.

You confuse "need" and "want".
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Re: Home lighting: 12v or 220v ???




by Stellah » 05/03/20, 13:31

Hello,
All the lighting of a house in 12V is possible. You simply have to choose LED bulbs of the MR16 generation type which can operate either in alternating or direct current with a power of 3W / 3,5W.
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Re: Home lighting: 12v or 220v ???




by izentrop » 05/03/20, 14:57

Stellah wrote:Hello,
All the lighting of a house in 12V is possible. You simply have to choose LED bulbs of the MR16 generation type which can operate either in alternating or direct current with a power of 3W / 3,5W.
Yes because a led is a diode, but it can be a little more complicated, see case by case.

For example if it is a question of replacing 12 V halogen, or if this led also contains an incorporated electronic module (we don't know anything if we haven't dismantled it) https://support.leclubled.fr/portal/kb/ ... ustre_EGLO
If the house supply is 230 V it is sometimes more economical to replace it with 230 V LEDs directly.

Otherwise, it's to discuss or just promote LEDs like before :?: : Wink:
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Re: Home lighting: 12v or 220v ???




by Exnihiloest » 06/03/20, 22:50

plasmanu wrote:It was U = R x I
Then the diode
Now we engrave at 7 nanometers
And the semiconductor touches the divine (almost)

So 3,7v 12V 110V 230V whatever
But 35A on a very small 3,7V battery it heats a chouia
...


And especially with a 3Ah battery, it lasts little: 5 min (and it can burn before).
With a simple capacitor, currents exceeding kA can also be obtained, but for ms. It is less the current than the capacity in Ah that counts.

As for etching at 7 nm, as we approach the size of the atom, we also reach quantum effects so progress will not be able to continue linearly. The technological breakthrough has already started, with components that exploit these quantum effects. Besides electronics, even magic seems corny.
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Re: Home lighting: 12v or 220v ???




by izentrop » 07/03/20, 01:37

Exnihiloest wrote:
plasmanu wrote:35A on a very small 3,7V battery it heats a little
...
And especially with a 3Ah battery, it lasts little: 5 min (and it can burn before).
With a simple capacitor, currents exceeding kA can also be obtained, but for ms. It is less the current than the capacity in Ah that counts.
At present, at equal size, it is rather 2.5 seconds, and therefore a capacity 120 times smaller.
Super capacitors in cars we are not there yet : Mrgreen:

Besides, the capacity is not clearly indicated in the specifications, only the maximum current.
If we will see the datasheet of this model 1/3 larger than the 18650: https://www.reichelt.com/fr/fr/supercon ... _tabholder
Capacity 500 F
Voltage 3.0 V (Vr)
Current 230 A
* Max. Current: 1 sec. discharge to 1 / 2VR

Unless I'm mistaken, we can deduce a capacity of 638 mAH at 1.5 V ... weak :frown:

I get the impression that Stellah is a robot that tries to place spam but does not succeed, because not once has he or she responded to comments. stellah-u22567 / posts /
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Re: Home lighting: 12v or 220v ???




by Stellah » 10/04/20, 09:32

Hello,
To help you choose the right lights for your home, I recommend that the 220V LED spots are much more advantageous in terms of implementation and maintenance costs as much for a new installation as for renovating an old one and that you should not choose 12V LED spots.
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Re: Home lighting: 12v or 220v ???




by izentrop » 10/04/20, 09:41

Stellah is a robot stellah-u22567 / posts / : Mrgreen:

If she answers me I eat my tongue :P
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