> He'sish soish preciseish andish consistentish aboutish usingish > approximateish valuesish ... :-) Aim was to TRY to avoid the pointless pillorying and digression that occurs when some few take exceptions to statements that they feel imply unwonted precision in specs OR lack of necessary precision. This sought to make it very clear that it was a request-for-rough-design-discussion for a simple-but-workmanlike-and-cheap-as-they-come SLA(ish) charger. Seems to have worked so far. Feedback has been excellent and useful. Russell McMahon -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist