Re: Using garage door remotes as a voting system?
- From: John Fields <jfields@xxxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 09 Apr 2005 15:30:52 -0500
On 9 Apr 2005 12:32:36 -0700, "Steve" <popmusic@xxxxxxx> wrote:
>I'm putting together a talent show and want to have the audience vote
>for the contestants (on a scale of 1 to 4 would be fine) using wireless
>remotes (maybe even garage door openers?) The results would be
>received through a computer system and then projected on a screen.
>Does anyone have any suggestions as to how such a system might be put
>together? Someone told me I should use a heterodyning receiver. I
>found a site that seems to have some of the elements:
>http://www.automicro.com.tw/ Any ideas as to which samples I should
>buy? Thanks for any info or suggestions!
---
Have you thought about what will happen if all the voting units
(remotes) are on the same frequency and a couple (or a few, or a lot)
of the audience members transmit their votes at the same time?
The way I'd do it would be to have the remotes be transponders which
are polled by the master. Assign an address to each remote and then
have it send its data when the master sends that address. After the
master receives the data it sends that address again, followed by a
signal which resets the remote so that the data stored in the remote
will be erased and not sent out erroneously during the next round of
voting but before that audience member votes again. Once cleared, the
remote sends the "cleared" signal, letting the master know that it's
ready for next time. The master then goes to the next address and
goes through the same drill, and when it's done there goes through the
rest of the remotes until all the votes are counted and all the
remotes cleared. Another nice thing to do would be to have the master
send out a "time to vote" signal to all of the remotes which would
light an LED on the remote when it was time to vote.
Email me if you'd like me to de$ign up a system for you.
--
John Fields
Professional Circuit Designer
.
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