Steve, Could you mount a strain gauge near the screw hole. Monitor the gauge by pic via an A/D? A sudden change in stress could tell you if a screw has loosened, before it drops out. Andy -- At Monday 1/24/00 11:22 AM, you wrote: >Friends, >First, Sorry for the Off Topic question. >Second, I need to design a fixture that will "sense" if a >screw is missing on a product. The device in question goes >into a test fixture. I would like to have a way of checking >for missing screws. Any suggestions? >And yes, it will have a PIC in it! >Thanks in advance. > >Best regards, >Steve > > >Steven Kosmerchock >RFS CELWAVE >Phoenix Az USA >Email: steve.kosmerchock@rfsworld.com >Personal: www.geocities.com/researchtriangle/lab/6584 ------------------------------------------ Interwoven, Inc. Moving Business to the Web Andy Watson Director, Technical Support Direct Line: (408) 530-5701 Main Line: (408) 774-2000 Fax: (408) 774-2002 Email: andy@interwoven.com Web: http://www.interwoven.com ------------------------------------------