I'm building for a physics exhibition a small circuit able to extract from a very long cable antenna (10 meter, 20 if necessary) a tiny amount of energy sufficient to power a tiny calculator.
The circuit i've seen on the web is:
The compoments are:
- C1 and C2 200nF 50V ceramic capacitors (x2)
- 1N34 germanium diodes (x4)
- C3 and C4 100μF 50V electrolytic capacitors (x2) and obviously a very long antenna.
Also a extra RLC on the output as "Joule thief" is a possible additions.
My question is, this method and circuit have the potential with a single cable antenna long in the order of 10-20 meter to power a small calculator?
If yes, there are some ways for increase the efficiency of the circuit (obviously within the scope of the experiment)? For example a way to focus the system on high power frequencies as radio freq. If no, there are some ways, even alternative, to power a small calculator without direct alimentation? I accept every suggestion.
PS: No conspiracy theory thanks