What do you do when the house power goes out? Look for flashlights! But if you're as sloppy as I am, you're going to see that they are out of batteries since the last time the power went out.
Since, in 90% of the times, the phone line is still working even when the whole city has no light. This instructable will show how to make a flashlight that uses the phone line power. (Yes, the phone LINE delivers a small amount of current to your house)
Before I start, I'd like to say that I did not find anything forbidding me to plug this into my phone line, but you should check whether it's legal in your country and if using the phone line current is prohibited by the phone company's contract. (and take it easy on the comments. English is not my first language and this is my first instructable)
Don't forget to rate!
Step 1: What you need
1x Phone wire
1x Box to put everything inside
12x White LEDs (3.0V / High Brightness)
1x LM317L or LM317T (Voltage Regulator)
4x IN4007 (Diode)
1x 6.8K ohm resistor
1x 270 ohm resistor
(the 2 resistors values may change depending on your phone line - See step 4)
Sorry for the picture, I've made this project a couple of years ago (way before I found the Instructables website) so everything is already put together.