Excellent Tim, great initiative!!
Thats somewhere along the lines of where I wanted to go, this is a response from an electronics
forum which is I guess is along the lines of what you have just suggested....
A magnet and reed switch can be used to turn on a loud siren, and/or switch on an RF transmitter
(simple transistor oscillator and AM/FM transmitter), so you can use a cheap radio as your receiver.
The problem perhaps needs to be thought of in reverse:
- Where will the receiver be located (in a building, worn on the body, etc.)? This gives you an idea
of what frequency to use, and how sensitive and selective the receiver needs to be.
- What will power the circuit? I presume either a small battery or a connection to a motorcycle's
battery (I don't know what type of cycle you are describing - electric, gas (petro), or pedal
power?). Simple transmitter circuits are easy to find on the net, and a lot of RF
transmitter/receiver products are available in the 900 MHz and 2.4 GHz ranges (if memory serves
me right).
Another idea is this......
http://www.cy-curity.com/ but too noisey and bothersome to the neighbours
especially in the case of false alarms unless its parked up in the city during the day! but I am
sure many folk on this forum could use such a device.
I studied computer electronics in Uni about 6 years ago so not sure my skills are up to developiing
such a device but i won't give up. Ideally it would be great to have a motion detector which would
trigger a receiver of key fob size say within a 100metre range to alert you to the bike or bike
cover being tampered with so it gives you the chance to investigate possibly with your camera or
your fist depending on your persuasion either way its a great deterent if it could be worked.
Fergus
"Tim Dunne" <
[email protected]> wrote in message
news:[email protected]...
> "Mr R@t (2.3 zulu-alpha) [comms room new build]" <
[email protected]> wrote in message
>
news:Mby4a.2442$%[email protected]...
>
> > I was thinking more of one of your friends / acquaintances / drinking partners playing a joke on
> > you (who would *know* your haunts and perhaps
> be
> > able to find out your preferred channel), rather than random mentalists
> with
> > scanners trying to trace it.
>
> I was jesting. It's worth considering - I did wonder about that. I'll save it for the mark 2,
> smaller and lighter version.
>
> > From reading your site I get the impression you are an engineer / hacker / techie of some sort.
> > I guess many of your
> friends
> > are, as well. I *know* the sort of sense of humour they have
>
> I'm an electrical engineer. Most of my mates are radio hams. Yes, they are nuts and they do have a
> very *peculiar* sense of humour...
>
> We don't know each other, do we.. ;-)
>
> Tim
>
> --
> Sent from Brum, UK... ...scheduled completion Sept 2003 'What's keeping the White House white? Is
> it chalk, is it fog, is it fear?' Steve Skaith, 'America For Beginners' Look, mum, an anorak on a
> bike! Check out www.nervouscyclist.org