Alt-BEAM Archive
Message #11463
To: beam@sgiblab.sgi.com
From: Kenneth Hale kennando@hotmail.com
Date: Tue, 7 Mar 2000 17:16:06 -0500
Subject: IR detectors
> I bought a infared LED and infared photo transistor for radio shack for a
IR
> detector and wired them up according to a circuit that I got out of some
> robotics book but it doesn't work. Either my components are bad or the
> circuit is. If anyone has made one of these before and could help me out
I
> would appreciate it.
>
> Thanks,
> Ken
> ______________________________________________________
>
11464 Tue, 7 Mar 2000 17:15:38 -0500 IR detectors Kenneth Hale
> I bought a infared LED and infared photo transistor for radio shack for a
IR
> detector and wired them up according to a circuit that I got out of some
> robotics book but it doesn't work. Either my components are bad or the
> circuit is. If anyone has made one of these before and could help me out
I
> would appreciate it.
>
> Thanks,
> Ken
> ______________________________________________________
>
11465 Tue, 07 Mar 2000 22:17:55 GMT [alt-beam] Re: Self-Awareness/Conciousness beam@sgiblab.sgi.com "Mike Kulesza"
All this discussion leads to one question:
What is, and how does one explain "self-awareness," or the state of
"conciousness"??
This is life's biggest question that has staggered philosophers since the
earliest times...
www.geocities.com/beambotix
______________________________________________________
11466 Tue, 7 Mar 2000 14:46:06 -0800 (PST) [alt-beam] Capacitor Values BEAM List Daniel Grace The thought just occured to me, how do you pick values
for capacitors when they're not part of a timing
circuit? For instance, in school we're learning about
amplifiers. Very simple, except for the two
capacitors. I get why they're in there. I know what
they do when they're not in there. But how do you
derive the values? One blocks the DC from getting into
the generator, effectively isolating it from the
circuit. The other is tied between the emitter and
ground, so that the AC we are generating doesn't turn
off the transistor. Again, these are used to block DC
and pass AC only. How do you go about getting the
correct values needed?
~Daniel
=====
ICQ # 39402143
__________________________________________________
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11467 Tue, 7 Mar 2000 18:25:53 EST [alt-beam] Re: MicroCore vs. BiCore beam@sgiblab.sgi.com BUDSCOTT@aol.com i know that i don't know a whole lot about the bicore, but i know enough
about it to say that it is impossible for it to adjust to motor feedback, i
also would say that it would be a suprise to me if the microcore had feedback
as well. It is simply an electronic impossibility.
-Spencer
11468 Tue, 7 Mar 2000 18:37:15 EST [alt-beam] Tower hobbies servo beam@sgiblab.sgi.com BUDSCOTT@aol.com i really want to start on a second walker and was thinking of using the
servos from solarbotics (the tower hobby ones). Are they decent to use for
the cost?
-Spencer
11469 Sun, 5 Mar 2000 08:20:06 -0500 old SE
> Hello,
> on alot of tildens old SE powered bots I see that they have 22k
> resistors. Anyonek now the circuit? I happend accross a few of these nice
old
> 22k's and thought I would make an aesthetically pleasing SE for a change
> rather then making it as small as possible.
>
> Steve
>
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