Is there yet a device that will substitute for real relay contacts in an AC= circuit? I have a test fixture in mind, which is complicated, but the interesting pa= rt is discharging a low impedance capacitor of about 0.1uF at 1kV into a co= il, and allowing the current to ring down. Spice tells me to expect currents in the kA range, and a prototype built wi= th a relay contact seems to confirm this. Tungsten contacts take a lot of = abuse, and they also generate a lot of heat. Minimal voltage drop, ability to trigger "closure" and "opening" at any poi= nt in time, huge currents, and bidirectional currents without turning off a= re all requirements. -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO 80301 USA phone: 303-417-1345 x110 email: david.vanhorn@backcountryaccess.com --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .