OT-- need plans for a wireless switch

From: ghldbrd_at_ccp.com <(ghldbrd_at_ccp.com)>
Date: Thu Jul 17 21:40:00 2003

I'd think a bit about IR, because of the following:

My neighbor complained that my ham gear was turning her television set on.
 IR control was being triggered by sunlight wafting in through drapes and
blinds, and happened to hit the right pulse sequence to turn on the set.
I've heard that is not unusual.

Being "outside", you might have something like that key up your
transmitter when you don't want it to. I'd stick with a hardwire PTT
switch of some sort.

Gary Hildebrand WA7KKP


> I second the motion! Use an IR link! Use of a frequency selective IR
> Tx/Rx system will prevent unwanted keying of your transmitter, and if it
> is anything like the ones I have built, the reflected signal will be
> enough to make it work (no need to be line of sight).
>
> Using RF to create a link is asking for trouble, not to mention a lot
> more work. Check FCC regs, this is considered remote transmitter
> control. If you choose to go RF, use a coded transmitter similar to a
> remote entry key, not a PL based one, since even that is susceptible to
> interference. Holtek makes a few Tx/Rx chips with digital coding. You
> can buy the chips at digikey.com. (But don't use them! Go IR!)
>
> -Bryan
Received on Thu Jul 17 2003 - 21:40:00 BST