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Topic: Getting 5V D/C from single live wire A/C light switch (Read 3 times) previous topic - next topic

Stanley

How do I tap 5V D/C from a single live wire A/C from a light switch without turning on the light ?

Something like the attached picture ...

fungus


How do I tap 5V D/C from a single live wire A/C from a light switch


Very carefully.

Seriously: If you don't know how, maybe you shouldn't be doing it.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

Grumpy_Mike

It depends on what sort of current and if you need isolation. But if you have to ask about it then no you can't do it. Or at least you should not. Ever seen the Darwin awards?

Nick Gammon

Some guy attached a lot of helium balloons to his deck chair, and he floated up into the air with a shotgun in his hand to burst the balloons if they got too high.

Needless to say, the system did not work the way he planned.

JimboZA

Quote
the way he planned


Although "planned" might be too kind a word: "expected" maybe? Or even "hoped"....
Roy from ITCrowd: Have you tried turning it off an on again?
I'm on LinkedIn: http://www.linkedin.com/in/jimbrownza

BillHo


How do I tap 5V D/C from a single live wire A/C from a light switch without turning on the light ?

How current flow on only single wire?

CrossRoads

Connect a 5V DC wallwart in parallel with the light bulb.
http://www.dipmicro.com/store/DCA-0510
When the light bulb gets power, the wallwart gets power.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
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JimboZA



How do I tap 5V D/C from a single live wire A/C from a light switch without turning on the light ?

How current flow on only single wire?


Zen-power
Roy from ITCrowd: Have you tried turning it off an on again?
I'm on LinkedIn: http://www.linkedin.com/in/jimbrownza

BillHo


Connect a 5V DC wallwart in parallel with the light bulb.
http://www.dipmicro.com/store/DCA-0510
When the light bulb gets power, the wallwart gets power.

But OP need 5V DC without turnung on the light

majenko




How do I tap 5V D/C from a single live wire A/C from a light switch without turning on the light ?

How current flow on only single wire?


Zen-power

It's those pesky Zen diodes again, isn't it?
Get 10% off all 4D Systems TFT screens this month: use discount code MAJENKO10

majenko



Connect a 5V DC wallwart in parallel with the light bulb.
http://www.dipmicro.com/store/DCA-0510
When the light bulb gets power, the wallwart gets power.

But OP need 5V DC without turnung on the light

Take out the lightbulb?
Get 10% off all 4D Systems TFT screens this month: use discount code MAJENKO10

retrolefty




Connect a 5V DC wallwart in parallel with the light bulb.
http://www.dipmicro.com/store/DCA-0510
When the light bulb gets power, the wallwart gets power.

But OP need 5V DC without turnung on the light

Take out the lightbulb?


Without access to both the AC line and neutral wires one cannot extract power for anything. It's like a bird sitting on a bare 2KV utility wire, nothing  dramatic happens to the bird because there in no current path.  ;)

Lefty


Grumpy_Mike


How do the 'no neutral wire' X10 modules like this do it?

There is a signal path through the load. But with not enough signal to actually do anything with the load.

BillHo


How do the 'no neutral wire' X10 modules like this do it?

It get the return path through the lamp.
Quote
Incandescent (2-wire) switch can only control resistive load ?40W (incandescent lamp or halogen lamps, etc). It
cannot control inductive or capacitive Load (like: Fluorescent lamps?save-energy lamps etc).

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