No, this isn’t a trick project. It actually works. Since the energy source for this flashlight is light and it works just fine at night, it must have a way of storing energy–and it does. However, like commercial solar powered flashlights, which store chemical energy in batteries which then convert this chemical energy to electrical energy, this flashlight stores electrical energy directly in two one-farad super capacitors. Today we use two 1-farad capacitors to store electrical energy to light an LED; tomorrow we will be using a bank of 10K farad capacitors to store electrical energy to power an automobile!
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I have two 9v 0.5w solar panels from radio Shack , what size Farad should I use ,,, to make the flash light ?
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This is an awesome idea! I’ve never realized how powerful DIY technology can be. I hope I can make a flashlight like this one day. Also, I am planning to be a science teacher for middle school/high school in the future, so this would be a great things for my students to do when learning about circuits and capacitors :)
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Thank you Mr Tom Fox.
How many of us come to the net and fish the river for knowledge.YOU gave your time and effort to doing the demo on video ….your a trooper for making net.
Agree with your sentiment that interest drives one onto a stage of knowledge.
You have a good heart Sir .
I am starting my ladder on electrics and aim to come back to you and the site ..often.
The issue with me is right now to build a solar powered light for a garden figurine…that lights automatically in dark.Had after one dip into YOUTUBE been impressed by a mobile phone battery set up.Wont launch with my project until more listening
Bye for now
Marcus. Dublin .Ireland