Alt-BEAM Archive
Message #13575
To: beam@sgiblab.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Mon, 17 Apr 2000 14:13:24 -0500
Subject: Re: Deadman's stick (was: RE: Monitor Salvage)
I did that too, but I grabbed the bottom of the big transformer that
runs the horizontala nd has the thick wire to the side of the CRT!
OUCH!!! left 3 pin point 3rd degree burns accross 2 fingers! Not wise to
be careless!
> Zoz
> Someone who has picked up a live monitor chassis and still remembers how
> much his arm hurt afterwards. Thank God it was low current!!!
--
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
13576 Mon, 17 Apr 2000 12:19:41 -0700 RE: ...notes from the electronically challenged.... "'beam@sgiblab.sgi.com'" Wilf Rigter Hi Jim,
As always, assemble project one step at a time and test before proceeding to
the next step.
In this case, you should have the 240ucore freeformed, ready to test but
not yet connected to the motors. When powered up from 4 series connected
1.5V batteries (6V) you should see a voltage fluctuation (0V to 6V) on your
meter between pin 10 (bottom right on the schematic) and each of the output
pins (3,5,7,9,12,14,16,18). If you get that reading the ucore is probably
working correctly. Next connect one motor between pins 3 and 7 and observe
the reciprocating motion (left, stop, right, stop). If that works connect
the second motor between pins 5 and 9 and observe the same motion but
alternating between motors (ie only one motor is running at a time). Follow
these steps and let me know where you get stuck.
Note that the 240 IC in the 240 ucore layout drawing is shown with the legs
pointing down. That is the opposite to the almost complete bicore drawing
which is shown with the pins sticking up. Also note the arrow symbol on pin
1,10 and 19 indicates a common ground connection on those three pins. And
note the four capacitors marked C1 are connected between pins 4 -17 , pins 6
- 15, pins 8 - 13 and pin 2 - 11.
regards
wilf
> -----Original Message-----
> From: Scolman,Jim [SMTP:ScolmaJi@amsworld.com]
> Sent: Monday, April 17, 2000 9:26 AM
> To: BEAM Mailing List (E-mail)
> Subject: ...notes from the electronically challenged....
>
> Good morning All...I have finished my freeform building of the Wilf Rigter
> 240UCOR circuit with parts from Solarbotics and Digi-key. I'm using the
> Namiki 18Cl-2507G powered gearmotors. I want to power this walker with a
> solar cell(s), but for testing I powered the circuit with six, 1.5 volt
> batteries. My meter showed the batteries as giving a solid 5V of power.
> Question #1. With the circuit powered and both motors turning, I
> tried to hold one of the motors, but the torque was
> so great I could not stop, hold, the motor with my fingers. Are the
> motors
> supposed to turn continually? What makes the legs
> "oscillate"?
> Question #2. My solar cell, SC3766-1, produces a solid 5V, but it
> will not turn even ONE motor, connected directly to
> the cell. I suspect it is a case of amperage, current, my meter does not
> read amperage so I can't compare the battery 5V to the solar cell
> 5V. Are amps the more important figure? How many amps do I need?
> I will have pictures of the circuit and the walker on my web page
> http://homepage.mac.com/jscolman/robot/robot.html
> soon. Thanks for the help and answers.....JWS.
>
> Jim Scolman
> AMS Services, Inc.
> Bothell, WA
> 425-402-1000 x353
> 206-910-6095
> scolmaji@amsworld.com
> Network Administrator
13577 Mon, 17 Apr 2000 13:51:07 -0600 (MDT) Re: Disappointment, not critics beam@sgiblab.sgi.com Don Papp On Mon, 17 Apr 2000, sebastiaan van Vliet wrote:
> yet, but I just think we should try to keep things our beloved BEAM-way. The
> last months I see an increased number of variations on beam wich are called
> "proudly" BEAM, but don't have the initial thoughts and ideas beam was meant
> to.
See - this I think is a source of some confusion. What exactly
the "thoughts and ideas beam [was] meant to [be]" are could be (and has
been) an ongoing discussion/argument/debate. To some BEAM=Solar Power and
spare parts. To others it means more.
DonP
www.anubis.ab.ca
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