What kind of electrodes can I use in a lemon battery?
recently I stumbled upon this instructable: http://www.instructables.com/id/The_micro_Lemon_Battery_reusable_1_hour_of_led_l/
and I immediatly recognised it as a nice way to spend an afternoon. Now here comes the question:
Are there any alternatives for zinc? For instance this instructable:
uses copper and aluminum foil, instead of copper and zinc.
If the previous question is answered with no, then could someone please tell me where I can find zinc? I mean something like: break open this device, there will be some zink in there.
If you feel like it then feel free to explain the principles behind electrochemistry to me. Always happy to learn something new.
Thanks in advance,
Dennis van Rooijen