Alt-BEAM Archive
Message #12005
To: beam beam@sgiblab.sgi.com
From: "Ben Hitchcock" ben@wollongong.apana.org.au
Date: Fri, 17 Mar 2000 15:30:22 +1100
Subject: [alt-beam] [Non-BEAM] Robot Simulator
All,
Please ignore if you aren't interested in robot simulation on a mac.
One of the university subjects I am doing at the moment requires me to
manage a year-long project, and present the finished product at the end of
it. This year the topics include a wireless network, a team of robots for
litter collection, and a product sorter. Guess which one I want to do!
We have to present three bids to the judges and they decide which bid is
most attractive and that is the topic that we do for the year. I had my
presentation today, and next week I find out which topic we do for the rest
of the year.
Anyway, to aid in the judges decision I spent the last week whipping up a
simulation of what we wanted to achieve. It works, but only runs on a
powerMac. So for those of you with PPC's, point your favourite ftp program
at:
ftp://wollongong.apana.org.au/memberpages/ben/RobotSimPPC1.0b0.sit.hqx
The size is 131k.
This will download my program and a file that contains the information on
what the robots look like, the colour and shape of the balls, etc.
When you run the program (read the README!) you should be able to see my
little robots scurrying around, pushing balls into one of two collection
areas. Note that the robots can only find balls by running into them, and
they can't actually direct where the balls will roll apart from pushing on
the opposite side of the ball to where the beacon is.
After a minute or so all the balls end up in the collection areas. The
nice thing about this program is that you can change a lot of things about
the robots behaviour without touching any code! You need to download a
program called Level Creator, and then you can add your own sprites to the
simulation, change the position and number of the balls, etc.
Anyway, if anyone finds this interesting then let me know. I'll be glad to
answer any questions you might have.
Ben
12006 Thu, 16 Mar 2000 23:57:47 EST [alt-beam] Best motors I've ever used beam@sgiblab.sgi.com "Corey Centen" The best motors I've ever used were Discman motors...damn they are good.
Anyways....thank you everyone for all the help on the FRED. I breadboarded
one of the FLED SE's and it works great so far..Ben, it was the transistors
that were the wrong way around I think...
Thanx again!
______________________________________________________
12007 Thu, 16 Mar 2000 23:04:32 -0600 [alt-beam] Re: Failed phototropism beam@sgiblab.sgi.com SG
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this is what you need.
you GOTTA see the video!
i'm just wunderin if this can be incorporated in a four motor walker!
-Sparky
At 09:30 PM 3/16/00 EST, you wrote:
>For some reason i cannot (still *sheesh*) got my almost complete walker
>circuit to act phototrophically! I've tried hooking the photodiodes in like
>in the BEAMant, i've tried hooking them in like on the light seeking head,
>and damnit, they just don't work! What i have found is that you can severly
>screw up the gate (gait, i've seen it both ways) by doing so. So, if you
>haven't seen those circuits go to beam-online.com, Nimbus is on his (hmm,
>lets see) 4th or 5th add on, first the touch sensors, then the diodes, then
>the rebuild of the diodes, then the third diode rebuild, then a piezzo
>electric buzzer (for when he gets bumped), so its a little crowded, but the
>diodes already have a fixture and all i need is the correct circuit. ThAnKs!
>
> -Spencer
>
>
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12008 Thu, 16 Mar 2000 21:37:49 -0800 [alt-beam] Re: Gear motor report alt-beam@eGroups.com "Ken Hill" Opps! - that's $9 each, not $7. Also, the company seems good to buy
from. Order arrived almost too fast :)
ken hill wrote:
original article:http://www.egroups.com/group/alt-beam/?start=11976
> Just received a couple $7 gear motors from Electronic Goldmine. They
are
> the ones that have a hand crank for use as a toy generator. Come in
a
> kit. Throw in the plastic gears and pop the case together, and pop
in the
> motor.
>
> They use a hex drive shaft. (easy to attach to with collar). Shaft
runs at
> about 30 RPM no load from a 1.5 vt AA bat. Seems like LOTS of
> torque. Couldn't stop it by squeezing the shaft with fingers.
>
> Gears are noisy at no load, but quieted down with some load
> resistance. Under "finger" load, it draws about 100 ma from the AA
> bat. About half that no load.
>
> Here's the link:
>
> http://sales.goldmine-elec.com/prodinfo.asp?prodid=2228
>
> They also have pager motors for $2 each. Haven't played with these
yet and
> have nothing to compare results too anyway. Anyone know if these are
junk
> or just a really good deal?
>
> http://sales.goldmine-elec.com/prodinfo.asp?prodid=2185
>
> Picture of gear motor attached:
>
>
>
>
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