I should have provided a more exhaustive list of things i'd tried, but on the other hand, i'd forgotten half the things i'd tried. Maybe i need to keep notebooks on all my little hobby projects :) I tried putting a diode in series, both between and after (+ side) the solar panels. No effect. Tried a capacitor (about 50uF and also tried 0.1uF) from - to + of both solar cells together and each individually. No effect... well, i got a more stable voltage reading, but nothing more. After careful consideration, i've decided that an old wall-wart would be just as fun of a power source. Less mobile, but i can still use the memory backup cap to keep time when unplugged. It can keep time for a few days at least off of that thing. Using internal RC, sleeping, and a 32.768kHz crystal on timer1 only draws a few uAs on the average To everyone who threw out some thoughts, thanks for your time. I'm not giving up... just postponing. I'll try it again another day when i think of another solar project. -Aaron > -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Joris van den Heuvel > Sent: Friday, February 08, 2002 8:20 AM > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [EE]: Solar Pic voltage > > > This may be a dead end, but here goes nothing ;) > > Have you considered putting a rather large-ish capacitor accros the solar > panel's terminals to increase their peak current? To me it seems as if the > step-up converter you're using demands peak current and the high output > resistance of the solar cells prevent this. > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.