> Note of caution: > Normal silicon solar cells (panels) CANNOT be connected directly to a battery > without diode isolation, preferably a schottky diode for lower voltage drop. In > darkness they will suck the life out of the battery. Yes, sorry I forgot to mention that in my post. > Even though the output > of small panels won't necessarily "cook" the battery, some sort of regulation > should be designed into the circuit as just plain good engineering. I don't see the point if the solar cells can't produce more current at full battery level in full sunlight than the batteries can withstand indefinitely. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.