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If you know of
a small internal speaker can project 20 feet, then we should just replace
the existing internal speaker with that one. I am no EE, but anything that
loud is going to need amplification circuitry. The SH3 has two 8-bit DACs, and
we are only using one of them. In addition, the HD64465 has a 12-bit DAC
that is unused. There is no need/reason to mess with a F series PIC,
interface with it, etc.
Ken
I say we create a seperate internal speaker that
snags some audio (or have the software send a call to the PIC we have now
placed on the board) from the onboard audio processor,,from here we can run it
through a PIC of some sort (F family being enough) and use pulse width
modulation, this would give you a wide range of sounds and tones that we can
create. You can create a tone with a small internal speaker and a PIC
loud enough to be heard from 20 feet away. Also, this would require very
low power, and wouldn't interfere with the VIBS external speaker
jack.
Robert
----- Original Message -----
Sent: Thursday, November 15, 2001 1:06
PM
Subject: RE: Audible Notice of casting
of a vote
Interesting.
The AVTS has an
internal speaker, but there is a hardware problem with the current sound
system so it is basically inaudible. But even if that were fixed in a
later release board rev, its doubtful that the little speaker would project
20". We can plug an external speaker into the VIBS audio port, but the
fun question here is how to power it and how to stop voters from
borrowing them. In short, I defer to Global's hardware development
department.
On the software
front, playing any sound they like when the ballot is cast will require
exactly one line of code.
Ken
Posted on behalf of Robert
Pickett:
This is a requirement for the State of
Louisiana. We are in the
process of bidding on a statewide voting system. Robert has been asked to
demonstrate this capability by Wednesday, November 21,
2001.
Provide an audible signal that the voter has cast
their vote. The audible
signal should be heard from 20 feet.
This would require a noise to be played once a voter has pressed
the “Cast Ballot” button.
Larry
J. Dix
Vice
President of Operations
Global
Election Systems
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