Alt-BEAM Archive
Message #06391
To: beam@sgiblab.sgi.com
From: "Jason -" evenflow88@hotmail.com
Date: Tue, 05 Oct 1999 05:04:18 GMT
Subject: [alt-beam] Re: Diferences in Mark T walker(Material)
by the way everyone and esspecially dave.....do u know what mark uses to
construct his walker's leg....i mean the material....it is like so solid and
hard to bend...wonder why he uses it...and for all of u who are already
expert in walkers....could u tell me how is the best way to shape a walker's
leg....the technique and stuff....and how do i fine tune it by playing with
the values(dont understand this)....thanks a lot
______________________________________________________
6392 Tue, 5 Oct 1999 01:07:26 EDT [alt-beam] circuit beam@corp.sgi.com Bumper314@aol.com hello, im looking for a high frequency (maybe 1khz) beam circuit that has an
output voltage of more then 5v, the wave form can be just about anything...im
looking to drive a piezo buzzer if your wondering
thanks
steve
6393 Tue, 05 Oct 1999 04:57:26 GMT [alt-beam] Re: Diferences in Mark T walker(Dave and begginer) beam@sgiblab.sgi.com "Jason -"
>From: Dave Hrynkiw
>Reply-To: beam@sgiblab.sgi.com
>To: beam@sgiblab.sgi.com
>Subject: Re: Diferences in Mark T walker
>Date: Mon, 04 Oct 1999 10:00:29 -0600
>
>At 12:31 AM 10/4/99 , Jason - wrote:
>
>>yea i know that already but why does he need to have at least 6 or more
>>bicore boardsfor a measly two motor walker?
>
>Lets's see. 2 for bicores, one for reverse muxing, one for eyes/sensor
>mounting, one for battery/PM2 module connections, and one just to even out
>the symmetry. Easy to hit 6!
>
Hey Dave,
so what are the eyes for?turning towards light...and what do u mean by
one to just even out the symetry.....I would also like to know why they
arent any mechanical stops in his walker anymore...did he figure out a way
to do it electronically which u dont want to tell us? and when are u going
to put the videos dave please....we are eager to see the two motor walkers
turn...so the beginners here can get a better chance in learning at a lower
cost because they dont need to buy so many gearmotors.......thanks a lot
p/s:what tips do u have for beginners......for the first timer in building
walkers....another thing is do u experiment a lot....like the whole time
trying to figure out the resistor and cap value of your four motor walker or
other bots....just would like to know a hint what the experts been doing to
get better results....maybe u can tell us more how u come up with better
bots to give us more inspiration to experiment...thanks again
yours sincerely
jason
______________________________________________________
6394 Tue, 05 Oct 1999 05:36:26 GMT [alt-beam] Re: OTU info? and stuff...(chris) beam@sgiblab.sgi.com "Jason -"
>From: jester96beam@iname.com
>Reply-To: beam@sgiblab.sgi.com
>To: beam@sgiblab.sgi.com
>Subject: Re: OTU info? and stuff...
>Date: Mon, 4 Oct 1999 19:08:47 -0400 (EDT)
>
>If anyone needs OTUs I have two of them. Let me know!
>
>Jason - with all these questions, I can only assume one thing - you're
>preparing to build your first walker ;-)
>
>Would anyone be kind enough to tape those two shows for me and mail them to
>me on VHS?? I live in southern ontario. Where I live, we hardly get any
>stations at all, so I have never seen any of these shows on robotics
>before. To top it off, we don't have cable or satelite, and we live in a
>big "ditch" in the earth's surface which means very poor reception.
>
>Chris.
well u are very very wrong chris..i have already built 4 walkers....i even
have the several picture of one of them which uses the Bc1 board i made my
self...in the photo gallery in the yahoo club under evenflow88...i would
just like to learn more to fine tune the performance and get more
inspiration from the experts u know.....
jason
______________________________________________________
6395 Wed, 06 Oct 1999 00:43:24 -0400 [alt-beam] Attn: Wilf: PS Head Question beam@sgiblab.sgi.com SG
--=====================_939199404==_
i can't decide wether or not to do the PSHead V2
or the PS Head V3. (probably the version 3, since i
have a few 74HCT240's around)
on your v2 head schematic, attached here,
(originally posted to the group on Sept.7)
I don't see any big 'ol woppin Capacitor to be charge by
the solar cell. Surly NOT meant to be run directly wired to the
solar power source?
I'm sure I'm missing something common knowledge here like,
the big cap is attached to = & - from power source directly,
but if so, what SIZE Cap should I use?
AND:
have you decided wether Photo Diodes or Photo resistors werk better?
(say diodes, since thats what i have!)
Thanx!
-Sparky
--=====================_939199404==_
Attachment: SM_HEAD2.gif
--=====================_939199404==_
--=====================_939199404==_--
6396 Mon, 4 Oct 99 23:50:25 -0600 [alt-beam] Re: circuit Ian Bernstein >hello, im looking for a high frequency (maybe 1khz) beam circuit that has an
>output voltage of more then 5v, the wave form can be just about
>anything...im
>looking to drive a piezo buzzer if your wondering
A bicore will work. Just use a 5K pot as the resister and set it to....
T = RC
so
R = T/C
.001 / .00000022 = 4.5K (4545.45454545)
Thats half a cycle....
4.5K / 2 = 2.2K (2272.727273)
So just hook up a multimeter to the pot and set the value to
(2272.727273). The best thing is to use a ociliscope because the
capacitors arn't exactly .22uF.
Think I got that all right.
Laterz
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