Alt-BEAM Archive
Message #10589
To: beam@sgiblab.sgi.com
From: BUDSCOTT@aol.com
Date: Mon, 21 Feb 2000 17:09:22 EST
Subject: [alt-beam] Re: Photovore and FLED SE
it really wouldn't be worth the trouble. it seems like a cheap way to get out
of ordering digikey or volt detectors in general, but it is way the hell to
inefficient (i can say that right?). anyway i tried making a symet with a
fled se. it was a pain, and eventually i broke down and sacrificed a volt
detector for it. much better. as apossed to charging for a minute and moving
a cm, it charges in about thirty seconds and travels almost an inch. don't
bother.
-Spencer
10590 Mon, 21 Feb 2000 17:14:35 EST [alt-beam] Re: MPJA geared motors beam@sgiblab.sgi.com BUDSCOTT@aol.com i'm sorry i babble somuch about these friggin' motors, but i just want to be
safe. i found out that they require about 90mA of current, not terrible, but
quite a bit compared to the 7mA required for the display motors i have (the
hell they make those with!! 7mA dear me!) which is downright and outright
crazy. these are a bit smaller though, i'm gonna use the ALS245 driver for
it, i'll just stack.
-Spencer
10591 Tue, 22 Feb 2000 09:39:31 +1100 (EST) [alt-beam] Re: Photovore and FLED SE beam@sgiblab.sgi.com Ben Hitchcock *grin*
> it really wouldn't be worth the trouble. it seems like a cheap way to get out
> of ordering digikey or volt detectors in general, but it is way the hell to
> inefficient (i can say that right?). anyway i tried making a symet with a
> fled se. it was a pain, and eventually i broke down and sacrificed a volt
> detector for it. much better. as apossed to charging for a minute and moving
> a cm, it charges in about thirty seconds and travels almost an inch. don't
> bother.
What about charging for a couple of seconds and moving a couple of
centimetres per
pop? Seems to me to be quite 'comparable' to your inch per 30 seconds.
You are right though - the original FLED design is pretty bad in low light
levels. I haven't got any complaints about the FRED design, though.
Ben
10592 Tue, 22 Feb 2000 00:10:14 +0100 [alt-beam] Re: Photovore and FLED SE "Thomas Pilgaard" If you are refering to Ben's FRED photovore SE I will have to disagree
strongly. I've had a breadboarded FRED photovore with a 3733 solarcell and a
4700uF cap that was quite active and displayed a phototropic behaviour much
equal to a 1381SE popper.
Besides - if I recall it correctly - Ben's goal was to present a cheaper
alternative to with 1381 + photodiode configuration.
Cheers,
Thomas
> it really wouldn't be worth the trouble. it seems like a cheap
> way to get out
> of ordering digikey or volt detectors in general, but it is way
> the hell to
> inefficient (i can say that right?). anyway i tried making a symet with a
> fled se. it was a pain, and eventually i broke down and sacrificed a volt
> detector for it. much better. as apossed to charging for a minute
> and moving
> a cm, it charges in about thirty seconds and travels almost an
> inch. don't
> bother.
>
> -Spencer
>
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