SP LED Flashlight Using Supercapacitor

Bored of joking with capacitors? Then its time for you to maneuver on to super-capacitors. These have huge storage capabilities. during this article you may conclude the way to build atiny low LED flashlight using supercapacitors.

The most disadvantage of capacitors is their giant voltage drop. For this project, a minimum voltage of two volts is needed to light-weight the LED. As a result, the “Joule Thief” style would be incorporated here. Using this, a AA battery is used to light-weight an LED until its fully discharged.
 during this case, a supercapacitor would be taking the place of the battery. Here an LED is employed to perform the operate of a diode. This ensures that theres sufficient voltage across the LED.

 the necessities of the project are listed below:
White LED
Super capacitor (10F, 2.7 V)
Transistor
Torus
1 k ohm resistor
Wires
Breadboard
The torus and therefore the transistor used here comes from an energy-saving lamp HS. Care ought to be taken whereas removing this from the lamp as a breakage may lead to the discharge of the mercury vapors. A lamp load along side a USB port is added to the circuit. This makes it compatible with a computer or a automotive radio.

A couple of precautions got to be taken whereas constructing the circuit. The USB port mustnt be supplied with excess power. The capacitor doesnt stand up to a high voltage and hence a zener diode is connected in parallel to handle the high voltage. The diode protects the capacitor when the voltage exceeds an explicit price.

 

 

 

http://streampowers.blogspot.com/2012/07/sp-led-flashlight-using-supercapacitor.html 

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Singular Cell Phone Can Be Used Battery 5 Exactly Like the Flashlight Without Screen

Japanese PHS operator Willcom shows the battery No. 5 mobile phone use

                                     Shaped like a remote control or torch

 Japanese PHS operator Willcom and Sanyo Electric has unveiled a battery of PHS mobile phone use. The phone has no screen, the body covered with digital dial key, shaped like a remote control or a flashlight, using a Sanyo eneloop 5 batteries.

Sanyo rechargeable battery technology has advanced, eneloop nickel-metal hydride batteries for its launch, significantly improved the "self-discharge" and other undesirable characteristics, one year after the electricity can still maintain a 80% claims to have up to five times more than ordinary battery working time and can be recharged 1000 times. Sanyo eneloop batteries have been launched based on a lot of electronic gadgets.

Willcoms mobile phone was cylindrical, 42 mm in diameter, length 134 mm, the upper part of the SIM card can be loaded for specific Willcom W-SIM. Use an eneloop battery can be sure that the phone five hours of talk time and 250 hours of standby time. At present mobile phone is still in prototype stage show.

3G mobile phone shipments in the Japanese market more than 98% and the remaining share was for the 2G mobile phones and
PHS are divided. Willcom continues to continue to bring new phones to market.

Using a Sanyo eneloop batteries, SIM cards can be put into the upper

At present mobile phone is still in prototype stage show

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