Alt-BEAM Archive
Message #01112
To: "'Andrew Miller'" twoam@golden.net
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Mon, 1 Mar 1999 09:31:22 -0800
Subject: [alt-beam] Re: New photovore circuit
Pee? Nah, having too much fun rediscovering some of these "old" circuits.
But seriously the diode resistance down to 10s of ohms? That's 100s of ma
leakage current! What chip geometry are we talking abou?. You must be
thinking LDRs.
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: Andrew Miller [SMTP:twoam@golden.net]
> Sent: Monday, March 01, 1999 4:58 AM
> To: Wilf Rigter
> Subject: Re: New photovore circuit
>
>
>
>
> Not to pee on your parade.... but it's been done...the one I have with
> that config in it is dated
> June 1996...But hey Keep sharing your ideas it's always nice to see
> parallel development of stuff..kind of confirms we did it right in the
> first place eh?
>
> Works great but you will have to put a couple of resisters in series with
> the photo diodes in your comparitor set up, as in really bright light
> i.e.. Sunshine the photodiodes go down to 10's of ohms resistance and as a
> result Sap a major portion of your energy....(10K pots will do)
>
> Neat aspect of this design is the fact that it works over a Much broader
> light range (way better in the dark) in fact if tuned right, in the dark
> you can get it to be phototropic towards the heat of your
> hand....
>
> In addition the "flop" from one state to another in really bright light
> becomes such a hairline fine that you will find that your photovore will
> almost completely stop or spin madly in one direction if the balance is
> out....
>
>
> all4nw
>
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