OT-- need plans for a wireless switch

From: Dave Brown <tractorb_at_ihug.co.nz>
Date: Thu Jul 17 16:50:01 2003

If you're really stuck on the 'wireless' solution, I think the cheapest
option has to be buying one of those 'el cheapo' wireless doorbells and
hacking it to do what you want.
DaveB
Christchurch, NZ

----- Original Message -----
From: <nerdware_at_ctgonline.org>
To: <classiccmp_at_classiccmp.org>
Sent: Tuesday, July 15, 2003 7:32 AM
Subject: OT-- need plans for a wireless switch


> I'm posting this here because, on the average, you guys are pretty
> smart.
>
> I'm trying to put a push-to-talk switch on the steering wheel of my
> car so I can key the 2-meter ham radio while keeping both hands
> on the wheel. I've got a little boom mic and have built an interface
> box, but how to mount the switch has me stumped.
>
> I picked up one of the velcro aircraft ptt buttons, which mounts
> nicely, but even with the relatively short turning radius of my
> Subaru it's still a good number of turns lock-to-lock and the coiled
> cord has a tendency to get snagged in the space between the
> wheel and steering column.
>
> My next thought is to use the aircraft button, but with a tiny
> transmitter/battery mounted on the wheel, with a receiver mounted
> under the steering column with a keying relay. Hit the button, the
> relay turns on, let up, the relay releases.
>
> I've been Googling for a while, but most tiny transmitters are either
> for "spy" audio apps, or are multi-button jobs for garage doors and
> things like that. All I need is a simple on/off fm transmitter that
> controls a simple relay on the receiver end, preferably powered by
> a couple of AA cells or similar, and the transmitter needs to be
> hackable so I can connect the wheel-mounted ptt switch.
>
> Any suggestions?
>
> I know this isn't directly related to Classiccmp, but it IS related to
> ham radio and electronics, and ham radio and electronics are
> related to hamfests, and hamfests attract computer collectors, so
> there. I just made the connection.
>
> Thanks.
>
>
>
> Paul Braun
> Cygnus Productions
> nerdware_at_ctgonline.org
Received on Thu Jul 17 2003 - 16:50:01 BST