Russell stated : > I have heard of > instances (urban legends?) where pressing on the top of the case has > caused an internal processor to expire. A new design I'm working on incorporates a bare piezo element and uses a shape molded into the housing as a sound chamber. The piezo is sandwiched between the housing and a couple of small springs soldered to the copper side of the board for contacts. Thanks for the warning - I'm going to specify a lot of support right around the piezo to prevent zapping my PIC. > Alternatively, > hold onto the business end of a gas lighting wand or a piezo > gas lighter (ouch :-( ) - these, of course, are mechanically > optimised for that application. Don't try this at home. -- Lawrence Lile Download AutoCad blocks for electrical drafting at: http://members.sockets.net/~llile/index.htm