Interesting 16V thought: knock light LED?

[rhock99@epix.net (Ryan H)]

Joe: so you mean you hooked it up to the open end knock sensor connector?

Julie: whoa...   ...
um, so i should invest in a Continuum Trans Functioner?  ;)

> 
> From: "Joe Doty" <Joe.Doty@lcnetwork.com>
> Date: 2003/03/28 Fri AM 11:33:53 EST
> To: "Julie Macfarlane" <juliemac57@hotmail.com>
> CC: <scirocco-l@scirocco.org>
> Subject: RE: Interesting 16V thought: knock light LED?
> 
> I've taken a multimeter that had a "spike" LED (not sure of the voltage
> threshold) and hooked it to two of the knock sensor wires. Then I tapped
> the knock sensor with a hammer.  On a decent enough hit you could make
> the LED come on.
> 
> Joe Doty
> IT/Development
> joe@lcnetwork.com 
> 
> > -----Original Message-----
> > From: Julie Macfarlane [mailto:juliemac57@hotmail.com]
> > Sent: Friday, March 28, 2003 3:42 AM
> > To: tberk@mindspring.com; rhock99@epix.net
> > Cc: brianm@earendel.org; scirocco-l@scirocco.org
> > Subject: Re: Interesting 16V thought: knock light LED?
> > 
> > If the attaching wire was sent to a HiZ (High impedance >10meg ohm)
> input
> > amp, (a comparitor would be better) the signal drain would be minimal.
> The
> > output could be sent to pin2 of a 555 timer in monostable mode.
> > As a monostable the output would drive the led for X# seconds each
> time
> > the
> > input was triggered. A potentiometer sets the time on for the LED time
> the
> > input pulse arrives.
> > 
> > <$10.00 from Radio Shack for the parts.
> 
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