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A Mame machine in an antique buffet - USB probs solved (I think!)
DashRendar:
I'm not an EE either, but...
Are you sure you want electric current running through that knife switch?
I mean, the metal's exposed and all. Not sure I'd want that out where people could get zapped! :dizzy:
Maybe it would be better just for show, rather than being functional.
gryhnd:
It'd only be 12V DC and not a whole lot of amps...nothing much to worry about IMO. You might feel a tingle if you held onto the metal and then grounded yourself to something.
i was thinking about that too, though...maybe DrV can come up with a cool looking flip-open case to protect the knife switch yet let it be seen. Some perforated/cutout brass in suitable steampunk style, or very victorian...or...well...you get the idea.
DashRendar:
--- Quote from: gryhnd on August 13, 2009, 06:18:54 pm ---It'd only be 12V DC and not a whole lot of amps...nothing much to worry about IMO. You might feel a tingle if you held onto the metal and then grounded yourself to something.
i was thinking about that too, though...maybe DrV can come up with a cool looking flip-open case to protect the knife switch yet let it be seen. Some perforated/cutout brass in suitable steampunk style, or very victorian...or...well...you get the idea.
--- End quote ---
Yeah, I was thinking the same thing. Maybe run shielded wires behind the metal, or bore a path in the metal- it looks thick enough to do that.
Or, it could be done with a push button switch and a spring around the handle perhaps. When pushing the switch closed, you would push down through the spring, but it would bounce back.
Bender:
How about something similar to what Dash said, put a little plunger switch in the middle on the bottom there so when you close it it hits the little microswitch, and have NO current at all through the thing
you could hide the look of the switch in some kind of little block or something
severdhed:
--- Quote from: Bender on August 14, 2009, 12:57:17 pm ---How about something similar to what Dash said, put a little plunger switch in the middle on the bottom there so when you close it it hits the little microswitch, and have NO current at all through the thing
you could hide the look of the switch in some kind of little block or something
--- End quote ---
if it hit the microswitch when it closed, wouldnt it still be holding the button in, similar to a push on/push off switch?
what about something like this:
one wire would attach at the hinge side of the knife switch. the other could attach to small conductive pad mounted on a non conductive post, that is taller than the regular contacts on the switch.. that way when closing the switch, the lever would briefly come into contact with the conductive pad, completing the circuit, and then move right past it until it is closed position.(which would open the circuit back up) this would be just enough momentary contact to trigger the PC to turn on or off.
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