Alt-BEAM Archive
Message #01114
To: "'Steven Bolt'" sbolt@xs4all.nl
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Mon, 1 Mar 1999 09:56:46 -0800
Subject: [alt-beam] Re: New photovore circuit
content-type: text/plain
Hello Steven,
Your resistor on one side will certainly unbalance the midpoint of the photo
diodes if the leakage currents are as high as Andrew Miller suggested.
Here's a "new" (and use the word cautiously) improved current limited and
photodiode balancing version of my photovore.You may experiment with pot
values of 100K -10M.
Sorry bout the credits: I humbly bow to all those who came before me.
<>
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: Steven Bolt [SMTP:sbolt@xs4all.nl]
> Sent: Monday, March 01, 1999 5:52 AM
> To: Wilf Rigter
> Cc: 'Les Davis'; Chiu-Yuan Fang; Keagan Schpfer; beam@corp.sgi.com
> Subject: Re: New photovore circuit
>
> On Mon, 1 Mar 1999, Wilf Rigter wrote:
>
> > Note the (I think) unique photodiode "discriminator". It detects
> > the difference between photo diode leakage rates ie light level
> > and flips the output.
>
> Ummm... Unique?
>
> Check, for instance:
>
> http://www.xs4all.nl/~sbolt/Images/e-fotovoor_schema.gif
>
> http://www.xs4all.nl/~sbolt/Images/smdFotovoor_schema.gif
>
> http://www.xs4all.nl/~sbolt/Other/SunEater_III_schematic.gif
>
> Best,
>
> Steve
>
> ----------------------------------------------------------------------
> # sbolt@xs4all.nl # Steven Bolt # popular science monthly KIJK #
> ----------------------------------------------------------------------
>
------------------------------------------------------------------------
eGroup home: http://www.eGroups.com/list/alt-beam
Free Web-based e-mail groups by eGroups.com
Attachment: photov2.gif
Home