Re: Light & Sound

["Marc Mosthav" <marc@xxxxxxx>]

Thanks Keith, sorry if this is another stupid question, but what pins
should
I use or where can I find the pin layout?

Marc
----- Original Message -----
From: "Keith Doxey" <ukha@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, August 17, 2001 11:40 AM
Subject: RE: [ukha_d] Light & Sound


> Hi Marc
>
> It wont work.
>
> as you correctly state, an ORP12 is a light sensitive resistor who's
> resistance varies according to the ambient light level.
>
> A microphone is TOTALLY different. It GENERATES electricity in
response to
> sound waves by moving a coil (which is attached to a moving diaphragm)
in
a
> magnetic field. (DYNAMIC Michrophone only - Capacitor Mics are
different
but
> still output an electrical signal).
>
> I assume from your question that you wanted to use the soundcard to
connect
> a light sensor via the MIC socket. It wouldnt work as the output from
the
> sensor would be at a fixed level for a given light level.
>
> You could attach sensors to the joystick port but you would have to
write
> the software to read the analogue voltage on the port.
>
> HTH
>
> Keith
>
>
>
> -----Original Message-----
> From: Marc Mosthav [mailto:marc@xxxxxxx]
> Sent: 17 August 2001 11:21
> To: UKHA_D
> Subject: [ukha_d] Light & Sound
>
>
> Hi all,
>
> being a newby to all of this my question might be extremely stupid. If
that
> is the case don't hesitate to tell me so ;-)
>
> My thinking is that I don't need a microphone on my HA computer
(running
> Linux) and microphones basically basically behave like sound dependent
> resistors. If I use a LDR like the ORP12 instead with some software
then I
> get a nice little light sensor.
>
> Does anybody have any thoughts on this?
>
> Marc
>
>
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>
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