Sunday, September 11, 2016

LED Flashlight Use Supercapacitor

Bored of playing around with capacitors? Then its time for you to move on to super-capacitors. These have huge storage capabilities. In this article you will find out how to build a small LED flashlight using supercapacitors.

LED Flashlight Use Supercapacitor

The main disadvantage of capacitors is their large voltage drop. For this project, a minimum voltage of 2 volts is required to light the LED. As a result, the “Joule Thief” design would be incorporated here. Using this, a AA battery can be used to light an LED till it is completely discharged.
In this case, a supercapacitor would be taking the place of the battery. Here an LED is used to perform the function of a diode. This ensures that there is sufficient voltage across the LED.

LED Flashlight Use Supercapacitor circuit diagram

The requirements 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 the transistor used here comes from an energy-saving lamp HS. Care should be taken while removing this from the lamp as a breakage could result in the release of the mercury vapors. A lamp load along with a USB port is added to the circuit. This makes it compatible with a PC or a car radio.

s is a circuit that is used to operate LED with voltage 230Volt, 230Volt it so that the voltage must be lowered in accordance with the needs of the LED itself. To lower it even necessary circuit as below.

 A few precautions have to be taken while constructing the circuit. The USB port should not be provided with excess power. The capacitor does not withstand 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 a certain value.

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