Alt-BEAM Archive
Message #13536
To: beam@sgiblab.sgi.com
From: turtletek@aol.com
Date: Mon, 17 Apr 2000 00:35:20 EDT
Subject: Re: Monitor Salvage
If you're bent on taking apart a monitor or anything else that could deliver
a harmful shock, I have a little tip that might help out. Work with one hand
behind your back. That way, if you get shocked, the current will go though
your working hand only.
If you were to work with both hands and you complete a circuit with one
hand at each point, the current would travel up one arm, through the heart,
and out the other arm. That could harm your heart.
This way, you might fry your hand but at least you'll live to never take
another monitor apart ever again. It also pays to wear gloves...or at least
keep your hand dry.
Oh, and if I'm wrong and this wouldn't help a thing, someone correct me. The
last thing I want to do is spread misinformation about safety! If BEAM is
inaccurate, let it be about the nomenclature of aquatic robots, but not about
safety.
-Brien the TurtleTek
www.extremesc.com/turtletek
13537 Mon, 17 Apr 2000 00:50:53 -0500 Re: Quadrapod Update... KINDA up! beam@sgiblab.sgi.com Richard Piotter Glad you appreciate it. I'm going to work on the html Monday and if
necessary, Tuesday.
Got one more "misc" project to add. It's a microwave timer that I
salvaged, repaired, and attached to an outlet. It is in a Plexiglass
case. No pics yet. Maybe tommorow or tuesday. I have more panels to put
on it, and am out of the parts I used as joiners. Works, even though it
has exposed high voltage right now. I've actualy used it for several
months. Never stopped to take pictures though!
Wilf Rigter wrote:
>
> Hi Richard,
>
> Thanks for sharing with us this very impressive body of work!
>
> No question already a big contribution to Beam state of the art and you just
> keep on pushing the envelope.
>
> I look forward to seeing your integrated AV Quadrapod bot.
>
> regards
>
> wilf
>
> ----------
> From: Richard Piotter
> To: BEAM
> Sent: 4/16/00 5:54:03 PM
> Subject: Quadrapod Update... KINDA up!
>
> Well I'm including a list of file names for the images. I had some power
> problems here. Lost power about 20 times last night and this morning.
> Realy hampered my work on the update, but I DID get the information
> uploaded.
>
> The Misc section has been updated. Look under school projects.
>
> Monitor link isn't complete though. For the Quadrapod, Battery Charger
> system, and the monitor images, you can go to the address below, and
> look for the following filenames of the new files.
>
> I'll have HTML up later.
>
> http://richfiles.calc.org/robots
>
> Charger Related Pictures
> BatterysKeys.jpg
> ChargerModification.jpg
> ChargerSchem.gif
> ChargerTransformers.jpg
>
> Monitor Related Pictures
> BassReflex.jpg
> BassReflexDetail.jpg
> LCDPCB.jpg
> PortableMonitor.jpg
> PortableMonitorCamera.jpg
> PortableMonitorInside.jpg
> VideoTransmitter.jpg
>
> Quadrapod Related Pictures
> QuadrapodBattKeyIn.jpg
> QuadrapodBattKeyOut.jpg
> QuadrapodLegBack.jpg
> QuadrapodLegBottom.jpg
> QuadrapodLegFront.jpg
> QuadrapodLegSide.jpg
>
> Quadrapod Blueprint Related Pictures
> QuadrapodPanelsBlueprint.gif
> QuadrapodFrameBlueprint.gif
> QuadrapodLegBlueprint.gif
>
> Walkman Jr. Related Pictures
> WalkmanJr3766.jpg
> --
>
> Richard Piotter The Richfiles Robotics & TI web page:
> richfile@rconnect.com http://richfiles.calc.org
>
> -- Make Money by Simply Surfing the Net or responding to E-Mail!!!
> -- Click below!!!
>
> http://www.alladvantage.com/go.asp?refid=ATL147
> http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
--
Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org
-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
-- Click below!!!
http://www.alladvantage.com/go.asp?refid=ATL147
http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630
13538 Sun, 16 Apr 2000 23:11:29 -0700 All: Photopopper questions from newbie. beam@corp.sgi.com Ken Hill I'm constructed a couple 1381 SEs that are popping nicely.
My problem is combining them into the beam-online circuits "Photopopper"
circuit. I need to use LDRs but can't figure how to substitute them for
the photodiodes.
Also, I'm not sure how the touch sensors work. Do they ground the V+ input
to the 1381 keeping it from firing and letting the other motor turn it away
from the obstacle?
(drawing shows the wires crossing but not sure if they are connected at
that junction).
And lastly, is the RC timer used to keep the motor from firing for a while
assuring the turn or what?
I can build em, but I want to understand em :) Thanks for any help.
Ken
P.S. It appears that if you are willing to use 2 solar cells (1 for each
SE) that except for touch sensors, they really don't need to be combined
and the cells can replace the photodiodes to change direction since if
mounted angled away from each other they will catch more light on one side
causing one motor to pop more often and turn toward the light. (Obvious you
say - well I said newbie :)
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