A question I asked my physics teacher a few years ago, 'How much fruit would it take to charge my mobile phone?' While this stayed as a joke idea for a while, this project has given me a chance to finally partake in such a study. I started by injecting zinc and copper into three different sources; a lemon, a lime and a potato, and I observed the voltage and current differences using a simple Labview VI.
The graph shows power vs time
Since the potato displayed the lowest voltage, I will focus on using lemons and limes. The above series measured approximately 1.91V and 5.77mA, giving an approximate power of 10.96mW.