You can get free electricity from your home telephone line just reading circuit diagram. Save money on your power bill, and hack into the electricity coming out of the phone jack. The phone company doesn’t monitor electricity usage of your this free light. Assemble parts as shown in diagram and you can brighten up your house at least you are not in total darkness.
You know that 50V DC that is available all the time in telephone line. So you should always remember that even when there is a power cut in the main line, the telephone line still remains active.[adsense]
Two 33K resistance adjusts the voltage and current and LED doesn’t burn out. And the Diode IN 4007 prevents reverse bias in case a AC is introduced in the circuit. Above circuit will provide enough light when used with 5 to 10 LED’ s full light to read a book if used as a table lamp. With this configuration, it will draw about 3mA at 50VDC of power from your phone line and small current being drawn. Your house phone and ADSL still working fine. Enjoy with this tip.