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The micro Lemon Battery (reusable, 1 hour of led light )



Hi, you probably already know about lemon batteries or bio-batteries. These usually use 3-4 lemons to barely light up a led. Good designed ones use just 1 lemon. I'd like to show you mine. It uses 4 DROPS of lemon juice. Weights 0.85g. Lights up a 3.5v, 35mA white Led for 1 hour. After 1 hours (more or less depending on climate) the lemon juice evaporates. It is like a natural timer. If you want more light, just put another 5 drops of lemon juice. You can re-use it for many, many times before oxidizing makes it unusable. Well, let's see how to do it (in less than 10 minutes)

The micro Lemon Battery (reusable, 1 hour of led light )

step 1Materials

'''Very basic materials you will need:''' -Zinc plated iron wire, 0.8mm section i use, but this is not important; -Some pieces of copper wire; -A Lemon -One paper facia…

step 2How it works

This battery is a zinc-copper battery. Searching with google or wikipedia will give you exact explanation of the electrochemical reactions involved, but here, we'll just se…

step 3How to make the cells

Cut about 1.5 cm of Iron wire. Take one paper facial tissue and carefully extract one of the 3 or 4 layers that compose the tissue. (The thinner, the better). Cut a a re…

step 4Done!

Solder the 4 cell in series to the led, respecting polarity. Put 1 drop of lemon juice on each cell. And voila', enjoy one hour of free light ;)

step 5Some considerations...

Here are some considerations about this battery. -wire the copper strands very close together for better results; -if you enclose the whole battery to reduce evaporation, …

Via Instructables, Published: 2009.03.22


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http://www.instructables.com/id/The_micro_Lemon_Battery_reusable_1_hour_of_led_l/