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....
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.
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).
@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.
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
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.
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.
Hi there. Thanks for the interest. In fact, the LED will flash during incoming call by it self due to AC supply ~100VAC during this time. Enjoy.....Cheers
Is there a simple way to make the LED lights stay off during most of the time then flash only when the phone rings? I'm looking for a DIY visual flasher for when the phone rings, so my mother-in-law can see when the phone is ringing (her hearing is bad). Your project is very close to what I'm looking for, I'm just not sure how to make the LED lights stay off and only flash when the phone is ringing. Can you help me?
hey there Mr. Gadget, it's not free if you have to pay for your phone service. I wonder how many amps the phone line will handle, I mean if you plugged about 4 or 5 hundred of these in. Or even thousands?
Hi Sniper. You are right. In fact we already pay for the monthly rental charges for the phone line. However, our house phone do not consume much power as you might think. The maximum power deliver to our phone line is about 20mA at 45VDC +/- 10% and about 100VAC when the phone ring. In order not to kill the whole phone line operation. I actually steal about 3mA from the phone line. That is the reason why i stress need to have high brightness white LEDs. You can still safely take 8mA from it. TQ.
Hi there. Thanks for your interest. Basically it will be cheaper for you to DIY. Material needed as follow:Resistor 33K X 2, 1N4007 X 1, High Brightness White LED X 3, a small PCB and a phone cable measuring about 2m will do. T Make sure you use the Red and Green wire only. You may need to swap the wire some time just in case. The total estimated cost is around USD3.00. Enjoy......and good luck.
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....
SAGUTRIC 9 months ago
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.
12Pascal21 9 months ago
How can I make a internet cable (RJ45) power a fan? I want to make it spin, thx
Phower 1 year ago
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).
rafkristoff 1 year ago
@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 1 year ago
wat heb je hier nou aan?
mooieauto 2 years ago
dat is een goede vraag
pim47 1 year ago
This is fine. But Nomadqqq's work is better. It can light 12 LED's rather than 3. See "Free Electricity from Phone Line" video on youtube.
pradeeprnh 2 years ago
Comment removed
GODLYHUMAN 2 years ago
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
RCEbooks 2 years ago
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....
SAGUTRIC 2 years ago
@SAGUTRIC How long does it stay free? I have a cell phone but no line phone but I have a phone jack.
Perktube1 1 year ago
Since when do we power household LED's with 120 VAC?
trisky1234 2 years ago
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.
SAGUTRIC 2 years ago
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.
elilla331 2 years ago
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?
dylanjcooke 3 years ago
Hi there. Thanks for the interest. In fact, the LED will flash during incoming call by it self due to AC supply ~100VAC during this time. Enjoy.....Cheers
SAGUTRIC 3 years ago
Is there a simple way to make the LED lights stay off during most of the time then flash only when the phone rings? I'm looking for a DIY visual flasher for when the phone rings, so my mother-in-law can see when the phone is ringing (her hearing is bad). Your project is very close to what I'm looking for, I'm just not sure how to make the LED lights stay off and only flash when the phone is ringing. Can you help me?
dylanjcooke 3 years ago
Hi. You simply reverse the red and green wire and it should work like a charm. Good luck. Cheers.
SAGUTRIC 3 years ago
u put capacitors on urs good idea does it blow kout the bulbs ?
hokyplaya8 3 years ago
Hi there. As you can see from my circuit. No capacitor is needed. Thanks.
SAGUTRIC 3 years ago
hey there Mr. Gadget, it's not free if you have to pay for your phone service. I wonder how many amps the phone line will handle, I mean if you plugged about 4 or 5 hundred of these in. Or even thousands?
sniper152 3 years ago
Hi Sniper. You are right. In fact we already pay for the monthly rental charges for the phone line. However, our house phone do not consume much power as you might think. The maximum power deliver to our phone line is about 20mA at 45VDC +/- 10% and about 100VAC when the phone ring. In order not to kill the whole phone line operation. I actually steal about 3mA from the phone line. That is the reason why i stress need to have high brightness white LEDs. You can still safely take 8mA from it. TQ.
SAGUTRIC 3 years ago
ne1 want to chat?
clanm8 3 years ago
Hey man, great video! There's no danger to the phone line itself by doing this?
Where I can that PDF with the circuit?
Thx!
Fergobirck 3 years ago 2
Hi. The video itself already show you the simple circuit diagram. You can pause the video to copy the schematic diagram. Enjoy..
SAGUTRIC 3 years ago
Is there any interferenc with DSL line?
mrx23dot 3 years ago
Hi. With this LED light in place, my 8Mb ADSL line still runing like a charm. Don't worry...... Cheers.
SAGUTRIC 3 years ago
Great idea. Where can I get one (or two)? Or, do I have to make it?
jdbrig01 3 years ago
Hi there. Thanks for your interest. Basically it will be cheaper for you to DIY. Material needed as follow:Resistor 33K X 2, 1N4007 X 1, High Brightness White LED X 3, a small PCB and a phone cable measuring about 2m will do. T Make sure you use the Red and Green wire only. You may need to swap the wire some time just in case. The total estimated cost is around USD3.00. Enjoy......and good luck.
SAGUTRIC 3 years ago