Re: Light sensor circuit 0-5 volt output help required

["ukhauk" <jasonstarkie@xxxxxxxxxxxx>]

Thanks Frank on the soldering iron as we speak

--- In ukha_d@xxxxxxx, "Frank Mc Alinden" <frankmc@...>
wrote:
>
> Hi Jason
>
> Maybe you can  use the circuit in the link....with some small mods..
>
>
http://science.uniserve.edu.au/school/Seismograph/detector/index.html
>
> HTH
> Frank
>
> ----- Original Message -----
> From: "ukhauk" <jasonstarkie@...>
> To: <ukha_d@xxxxxxx>
> Sent: Monday, April 10, 2006 6:58 PM
> Subject: [ukha_d] Light sensor circuit 0-5 volt output help required
>
>
> >I am trying to construct a light sensor circuit with an analogue
> > output 0-5 Volt DC. Supply voltage around 12 volts
> >
> > I have been trying to adapt maplins MK125 Light Sensitive Switch
> >
> > http://www.maplin.co.uk
> >
> > The MK125 uses an op amp to compare a setpoint voltage with the
> > voltage across a light sensor. Can I limit the output voltage on
the
> > op amp using feedback ?
> >
> > Or am I on the wrong track, has anyone come across such a
circuit.
> >
> > I want to use the sensor as a Dusk to dawn sensor ideal for
example
> > on a web brick / barionet. Having an analogue signal would allow
> > different actions dependant on various levels.
> >
> > any help or suggestions appreciated I have spent days on google
> > without succsess.
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>