Homebrew PCBs

At 08:25 PM 9/26/2007, you wrote:


>"Tony Smith" 
><<mailto:ajsmith%40rivernet.com.au>ajsmith@...> writes:
> > Cool doors, glass with electromagnets to hold them closed.
>
>I asked about the magnets once. It's a fire code thing; the doors
>automatically unlock in the event of fire or power loss

they usually use accus as a back-up power supply

>, just because
>the magnets stop working. With a "power open" lock, people might get
>trapped in a burning building.
>


[Non-text portions of this message have been removed]