At 05:06 PM 1/2/03 +0100, you wrote: >Can't you just break open the button and shortcircuit it with a counter >and a timer? Or is it a mechanical switch, cause creating a robot for >pushing a button seems a bit senseless to me... How do you test the switch, then? We made a test setup for CSA for testing microwave ovens. It had to actually open and close the oven door xx (large number of) times to make sure the interlocks were going to be reliable over the life of the oven. Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads