On Wednesday, Jun 2, 2004, at 03:38 US/Pacific, Matthew Brush wrote: > I always notice little parts (usually look like SMT transistors) which > are silkscreen labelled CR1, CR2, etc... What does CR stand for? Parts labled CRn are usually rectifiers (ie diodes.) For instance, see here: http://www.blueguitar.org/new/text/threads/from_mark/ Voltage%20Multipliers.pdf I'm not sure what CR stands for. Perhaps "Current Rectifier" to indicate a component handling significant power (compared to a signal diode)? BillW -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.