I can only say from practical experience with portable phones.... I have had 2 different makes of phones fail after about 5 years due to intermittent and bouncing button problems. Opening the handset and cleaning the PCB traces and rubber keypad with alcohol seems to cure the problem. ======================================================= Lawrence Glaister VE7IT email: lg@jfm.bc.ca 1462 Madrona Drive http://jfm.bc.ca Nanoose Bay BC Canada V9P 9C9 ======================================================= ----- Original Message ----- From: Bruce Cannon To: Sent: Tuesday, September 19, 2000 3:12 PM Subject: [EE]: service life of rubber-and-trace switches > Hello: > > Anyone have any knowledge about the switches used in cheap consumer > products, the kind made from a carbon-impregnated rubber contact pin and a > little interleaved PCB spot? In terms of service life (assuming a sealed > environment). > > Bruce Cannon > Style Management Systems > http://siliconcrucible.com > (510) 787-6870 > 1228 Ceres ST Crockett CA 94525 > > Remember: electronics is changing your world...for good! > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > "[PIC]:" PIC only "[EE]:" engineering "[OT]:" off topic "[AD]:" ad's > > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: "[PIC]:" PIC only "[EE]:" engineering "[OT]:" off topic "[AD]:" ad's