On 01/11/10 16:04, alan.b.pearce@stfc.ac.uk wrote: > The IEC symbols have been around for several decades, and are common on > schematics that originate in Europe. Elektor love those symbols. I think they're pure, distilled evil... There's a good reason I keep the Texas Instruments Logic Pocket Databook=20 around: it has both sets of symbols, and full pinouts for almost the=20 entire 74LS and 4000 series. Well worth pestering your local TI rep for=20 a copy, if it's still available :) --=20 Phil. piclist@philpem.me.uk http://www.philpem.me.uk/ --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .