How do i isolate a in p=a+b+c?

With multiple Voltaic Piles, how do I isolate cells to charge a large capacitor?

• With multiple Galvanic/Voltaic Pile, how do I isolate cells to charge a large capacitor? I previously built a Voltaic Pile which fully charges a 100microfarad Electrolytic Capacitor in as little as 10 minutes, to 12 hours depending on temperature, sunlight etc.. I have just built another 5 of the same cell. And want to isolate their individual outputs (which each go to a small capacitor) somehow. And when each reaches a certain voltage (say 0.3 or 0.8 volt) feed their individual outputs into a large capacitor say 10millifarad. I planned to try a BC548 transistor to isolate each cell, but I wonder if the current would be too low and other problems with such a slow rate of charge. Any idea whether a transistor could be used. Or some other component/IC. A diode has too high of a voltage drop I think as it may consume all the available power? Basically I want to pump the power from each cell's storage capacitor, to a big shared capacitor. Is this possible somehow? Any ideas?

• Answer:

  I use a voltage divider and get the voltage I require.