David Brown wrote:
On Fri, Aug 29, 2008 at 08:51:39AM -0700, Gus Wirth wrote:
This thing is supposed to be a USB device. If so, it can draw power from
the PC it's connected to. That will give you 2.5 watts to work with. The
battery only needs to power the clock. A cell for a watch should let it
run for at at least a year depending on your design.
I didn't realize we were designing a USB device. Does the design
allow interaction with the host computer, or is it just to receive
power?
I was leaning more toward a keyfob with an LCD. That would be the
starting point. If someone figured out a good way to make use of the
USB interface, more power to them, but a something which works *exactly*
like the SecurID fobs would be easier to convince people about.
Success is often based more upon marketing than technical factors.
-a
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