RE: [TCML] Tesla Coil w/Cell Phone Trigger - Suggestions Needed!

["S&JY" <youngs@xxxxxxxxx>]

Gabriel,

Without knowing more details, I would recommend you don't use a cell phone
to trigger anything potentially dangerous.  There is no guarantee that the
phone won't ring due to a wrong number, etc., when you are not expecting it.
This could lead to bad results and injury.

Best to have a very positive fail-safe means of turning on and off Tesla
Coils and other high voltage devices.

--Steve Y.

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of jimlux
Sent: Sunday, September 28, 2008 2:08 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Tesla Coil w/Cell Phone Trigger - Suggestions Needed!

Gabriel Ritter wrote:
> Hello,
> 
> We are trying to use a cell phone as a Tesla Coil trigger (when the phone
> rings, the coil discharges) and were wondering if anyone had suggestions
on
> how to integrate the cell phone with the following solid state coil:
> 
> http://www.geocities.com/tom_headoflead/drsstc.html
> 
There's a fair amount of literature out there on using a cell phone to 
trigger, e.g., a improvised explosive device, that google will find.

One way that's obvious is to detect the ringing signal.  For instance, 
some phones light up when an incoming call is detected. Others send the 
ring sound through the headphones, where you could use a simple audio 
threshold detector sort of circuit.

If you want to get fancier, there are schemes where the phone 
autoanswers (some phones can do this automatically, as a sort of
quasi 
PTT functionality). Then you feed the receive audio to a detector (by 
hooking up to the headset jack)

There was an article recently about someone using cellphones to remote 
control their house.  I don't recall where I saw it.
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