You are handy and you want to test supercapacitors in a concrete project?
Antoine Roussel shows on his blog "The creative family" how to make a flashlight using a supercap:
Immortal flashlight (in french).
The author explains step by step how to make it with photos and electric plans.
The result is a flashlight that illuminates for 15 minutes (without loss of brightness) and recharges quickly. Antoine Roussel goes even further by adding a USB port to the device to easily recharge his flashlight from a computer, a car radio or other electronic device with a USB port (while charging is done in 1 minute).
This system is clever at exploiting energy from the supercapacitor because it uses a Joule Thief to raise the output voltage.
On the other hand, We disadvise to use the indicated process of charge.
We will explain this in a futur article: How to charge a supercapacitor?
components necessary to achieve the supercapacitor flashlight:
- a supercapacitor 10 farads (10F / 2.7V)
- a white LED
- a transistor
- a torus
- a 1 k ohms resistor
- some thread
- a prototyping board
The result in images:
Antoine updated his flashlight mounted supercapacitor:
Improved immortal flashlight (in french)