Free Phone Line Power - LED Light

You are looking at a very simple free LED Light Power from your very own house phone line. Material needed: 1) 2 pcs 33K Ohm Resistor, 2)1N4007 Diode (Prevent reverse bias of white led when phone ring ~ 100VAC), 3)3 pcs High Brightness White LED and a RJ-11 plug with phone cable.
Connect all these parts as shown in the video. There you go....... It can brighten up your house...at least you are not in total darkness. With this configuration, it will draw about 3mA at 50VDC of power from your phone line. With such a small current being drawn, my house phone and ADSL still working fine. Enjoy......

Category:

Science & Technology

Tags:

• Phone
• Line
• LED
• free
• led
• light
• white
• power
• from
• phone
• line
• hidden
• analog
• power.

[SAGUTRIC]

Mine is simple design and yet still working like a charm till now. Should be ~3 years now. Still shine and bright. Another good thing about using diode is that you can connect it in reverse direction. Then you have flishing light only with incoming call. Good luck....

[RCEbooks]

This is a GOOD reason for you to stay in school! Not only does a 120 VAC device NOT work from 1.5 VDC source, but you are STUPID if you went to the lengths to even try this. If you don't KNOW what VAC/VDC means... you really need to get your ass in school then! Ciao

[SAGUTRIC]

Hi. It work for more than a year now. 24/7. I don't know why your comment so impolite. This design idea provided as educational purpose. Enjoy....

[trisky1234]

Since when do we power household LED's with 120 VAC?

[SAGUTRIC]

Hi. If you thinking of power the LED from 120VAC. You need to connect 1N4007 in series with the LED and resistor. 1N4007 diode will prevent LED from reverse break down due to AC negative cycle. Where as the resistor will limit the current. Please ensure you use the correct resistor power rating. Good luck.

[dylanjcooke]

Very nice project, great work. I can see this being a very handy gadget. Is there a way to make the LED flash during an incoming call?

[SAGUTRIC]

Hi. You simply reverse the red and green wire and it should work like a charm. Good luck. Cheers.

[12Pascal21]

It is far better to use a rectifier BRIDGE rather than a simple series diode.

LED's are very sensitive to reverse voltage and if the diode leaks (or it's body becomes moist) it will let pass reverse current that will blow the LED's.

Also, with a bridge, the device becomes polarity insensitive.

It is best to install the bridge next to de LED's and NOT on the line. This way, the bridge won't have the full line voltage to handle.

[Phower]

How can I make a internet cable (RJ45) power a fan? I want to make it spin, thx

[Perktube1]

@SAGUTRIC How long does it stay free? I have a cell phone but no line phone but I have a phone jack.

[rafkristoff]

@rafkristoff So my point is that in ON-HOOK (DC) condition the resistor will limit the voltage and current so LEDs will not be burned and in ON-HOOK (AC) the LEDs will bias the current so that only positive cycle will be allowed (since LEDs are diodes). This circuit is much practical I presume, due to it don't need voltage regulator and a bridge rectifier. Anyway, thanks for the video mate. Cheers.

[rafkristoff]

This is much simpler circuit than other Telephone-line-free-electricit­y videos. In other videos, I don't understand why they need to have a bridge rectifier and a voltage regulator? Correct me if I'm wrong, telephone lines are usually around 48Volts(DC) and when it rings it reaches around 90Volts(AC).

[pim47]

dat is een goede vraag

[mooieauto]

wat heb je hier nou aan?

[elilla331]

All you're doing is delaying the breakdown with a resistor by 'resisting' the AVC push across the line. To stop a LED's from breaking down in a 120VAC line you need some type of passive inverter, they're easy enough to make. And cost about $5, maybe $10 if you use a breadboard.