Alt-BEAM Archive
Message #02541
To: dave@solarbotics.com, pelanj@feld.cvut.cz, beam@corp.sgi.com
From: Bumper314@aol.com
Date: Wed, 21 Apr 1999 18:34:49 EDT
Subject: [alt-beam] Re: 555, 3909 SE
In a message dated 4/21/99 11:39:41 AM Pacific Daylight Time,
dave@solarbotics.com writes:
>
> Yup. I did some experiments using the latest CMOS 555's about 2 or 3 years
> ago. The current draw was around 10~25 uA, and the set time interval
> shortened (!) under low light. I understand that zetex has a new
micropower
> 555 out now - I should repeat my experiments.
>
> Included is a tiny 5k file showing a test PCB I once made. If anybody
wants
> the original AutoCAD 12 file, let me know...
>
> Regards,
> Dave
I dont like type 2 SE because in low light they have a really hard time and
ends up firering with nothing in the cap. So anyone know how to use a Cds
photo sensor to slow the firering rate in lower lite and shorten the rate in
bright lite? It doesnt sound hard, but im not good at this stuff =)
Steve
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