This little device lights up my electronics shop for free day and night. Its a sort of free night light. I can now use dead batteries to get light long after they are considered used up.
The Joule Thief I made in the previous post can use old discarded batteries to light up an LED. This is perfect for emergency lighting, a night light, camping or survival.
Imaging putting this circuit into a small flashlight package and use dead batteries to give you light in a survival situation. When the power goes out this can provide you with free light.
Here is the previous article where I show you how to make this device:
https://steemit.com/science/@diy-electronics/how-to-make-a-joule-thief-to-use-dead-aa-batteries
Mine was running for an entire three days and nights using a dead battery. I have never thrown out any of my old batteries so I have a lot that I can use for free lighting.
You could also use any other 1.5 volt battery for this circuit. The larger C and D batteries would power the light for a very long time.
I had mentioned using an Earth Battery to power this device in the previous article. This is quite an exciting idea. Imagine free light forever. An Earth Battery never gets used up really. With time, a long time, the metal parts may have to be replaced due to corrosion in the earth. But it is essentially free energy once you put the rods into the earth.
Here is the video of my little LED light after three days and nights:
Check out my electronics channel for more exciting projects:
The Do It Yourself World Electronics
And check out The Do It Yourself World for articles and experiments in alternate energy, survival, homesteading and more.