Free Phone Line Power - LED Light

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

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

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?

Hi there. As you can see from my circuit. No capacitor is needed. Thanks.

u put capacitors on urs good idea does it blow kout the bulbs ?

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.

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. With this LED light in place, my 8Mb ADSL line still runing like a charm. Don't worry...... Cheers.

ne1 want to chat?

Hi. The video itself already show you the simple circuit diagram. You can pause the video to copy the schematic diagram. Enjoy..

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!

Is there any interferenc with DSL line?

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.

Great idea. Where can I get one (or two)? Or, do I have to make it?