Apparently Hans Camenzind designer of the 555 ic and some D-class=20 amplifiers has died aged 78. If this should be in OT I apologise. Colin -- cdb, 7/09/2012 =20 -- colin@btech-online.co.uk --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .