On Mon, 01 Sep 2008 12:04:05 -0700, Robert Maas, http://tinyurl.com/uh3t wrote:
>> From: George Neuner <[EMAIL PROTECTED]> A friend of mine had an >> early 8080 micros that was programmed through the front panel using >> knife switches > > When you say "knife switches", do you mean the kind that are shaped like > flat paddles? > Pedantic correction: "Knife switch" is the wrong term. These are high current switches, typically used in the sort of heavy duty circuit where the wiring hums when power is on or in school electrical circuits so even the back of the class can see whether the switch is open or closed. In these a copper 'blade' closes the contact by being pushed down into a narrow, sprung U terminal that makes a close contact with both sides of the blade. Like this: http://www.science-city.com/knifeswitch.html What you're talking is a flat handle on a SPST or DPST toggle switch. It is often called a paddle switch and mounted with the flats on the handle horizontal. Like this, but often with a longer handle: http://www.pixmania.co.uk/uk/uk/1382717/art/radioshack/spdt-panel-mount- paddle-s.html -- martin@ | Martin Gregorie gregorie. | Essex, UK org | -- http://mail.python.org/mailman/listinfo/python-list
