peter green wrote: > My first throught would be you probablly need something to limit > current > flow into the battery Unless the solar panel in full sunlight doesn't put out enough power to hurt the battery. > and a diode to prevent backflow from the battery > to the converter. Think about it. That's inherent to a boost converter. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist