Alt-BEAM Archive

Message #13770



To: beam@sgiblab.sgi.com
From: BUDSCOTT@aol.com
Date: Thu, 20 Apr 2000 21:04:21 EDT
Subject: Square Wave


I finished it. I was kinda bored the past couple of days, so i decided to see
just what musical ability the Bicore circuit has. Here are my findings. I
built a small synth that has a little PC speaker that's hooked in where the
motor would go, and two trimpots with dials, a one turn (tuner) and a 10 turn
(fine tune), and it works surprisingly well. I use a switch that brings V+ to
pin 10 on the 240 and a button that activates the enable lines, so you can
give length to notes. You'd be surprised but it is able to produce tones that
are more stable and cleaner than some occilators that i've seen! It has that
typically mellow square wave tone instead of the usual sine wave occilators.
Just a bit of info for anybody interested.

Now, for a BEAM app. (so this post is technically on topic). Remember that
cricet circuit that was talked about earlier, instead of using some foriegn
chip that we normally don't have handy, use the bicore with about a 3-10k
resistor across the caps and ta-da! You'll have a sutible occilator for a
small speaker! c'ya

-Spencer

<http://www.botic.com/users/beamstop>

not a robot scientist
not a college major
not a grad student
not a professor
not a very organized person
just Spencer (isn't that impressive enough?)



13771 Fri, 21 Apr 2000 12:56:39 +1000 wilf archives "David Perry"
Hi all,
I've updated my web page and added a big pile (50) of Wilf's images =
there. This is the 4th time i've tried to get this email through! Check =
out www.surf.net.au/jmdbb/robotics.htm

David






http-equiv=3DContent-Type>

> At 08:31 PM 4/20/00 EDT, you wrote:
> >
> > Yanks....! Hey watch it Ben. Our Civil War wasn't that long ago. Many
take
> > that as an insult (me maybe). Americans. Not Yanks.
>
> *sigh* i guess you get offended when we are referred to as "the colonies"
>
>


__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
http://im.yahoo.com



13773 Thu, 11 Nov 1999 01:47:21 -0800 Re: 1381's in Australia beam@sgiblab.sgi.com robmc@acay.com.au Seppo seems to fit.

Rob



13774 Thu, 20 Apr 2000 22:49:27 -0600 Re: Solarizing beam@sgiblab.sgi.com=20 JVernonM@aol.com=20
In a message dated 4/19/00 11:59:27 PM Eastern Daylight Time,=20
TurtleTek@aol.com writes:

> Does anyone know if the Ucoba* can be solarized using the =
Chloroplast SE**?
> =20
> I know of the PM1, the D1, and the 1381 DLSE for solarizing. Are =
these as=20
> effective as the Chloroplast? Which do you prefer/recommend?
> =20
> What can and can't the Chloroplast solarize? And if you don't mind, =
why?=20
If=20
> these are too many questions, don't feel pressured to answer them =
all. Any=20
> answer whatsoever is appreciated.
> =20
OK, I'll give it a shot.=20
Yes, the Chloroplast should work fine for the Ucoba circuit. Use two =
of the=20
large solar cells and a 4700uF cap for starters and experiment from =
there.
I think the Chloroplast will solarize just about anything. But, I =
could be=20
wrong. The PM1 should work too. But, I've had real performance =
problems with=20
less efficient motors. The D1 will work easy with rechargeable =
batteries, but=20
I recommend Wilf's SIMD1 for your application. This will give you a =
nocturnal=20
bot, but this could be interesting as well. The 1381 won't work at all =

because it needs an inductive load to pull the circuit into =
activation. A=20
Bicore or BEAMant circuit doesn't provide this. I'm about to tackle =
this=20
problem myself right now. I have a BEAMant circuit on a good aluminum=20
platform that will be my Zenbot prototype. I'm using Portescaps so I'm =
going=20
to try the PM1 first. But, I plan to compare performance with a =
Chloroplast=20
just for giggles.=20

On another topic. The old D1 would be the perfect circuit for the =
avoidance=20
behavior recently discussed on the list. It's mushy start would lend =
it's=20
self well to detecting even slight shadows. The charge in a super cap =
could=20
be dumped into the motors and give a good zip of speed away from =
danger very=20
similar to what Bob Shannon did with Vore-n-more. I'm not sure about =
enough=20
speed to avoid a foot fall, but definite avoidance behavior or a =
flight no=20
fight response could be hooked up in a matter of minutes this way. Bob =
used a=20
limiting resistor to get the bot to pop very rapidly but retain a =
determined=20
direction. This sounds like a valid first step to a working prototype.

See ya,
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
ICQ# 55657870




http-equiv=3DContent-Type>
power=20
plants to the much bigger and heavier Cybug Scarab with quite good=20
results.
 

The chloroplast is also great if you need a 5V keep-alive circuit =
for any=20
microprocessor ( stamp? ) or logic circuits.  I am tinkering with a =
two=20
motor walker which uses a universal shift register as the =
controller.  The=20
cool thing about this shift register is that it has a FWD/BACK control =
on it for=20
quick and easy reverses!  Of course, it needs a minimum 5V input =
for the=20
chip to live, but that's the cool thing about your chloroplasts!  =

 

Please give this powerful solar engine a chance:  There's no =
copyright=20
on it:  Sort of like the LINUX of solar engines!

 

Try 'er


Craig Maynard
JCM Electronic Services
3335 Caribou Drive=20
NW
Calgary, Alberta, Canada T2L-0S4

 

( href=3D"http://members.home.net/cybug">http://members.home.net/cybug">http://members.home.net/cybug =

)
Enter the Millennium robotgames at href=3D"http://www.robotgames.com
">http://www.robotgames.com">http://www.robotgames.com
 

* * * * * * * * * * * * * * * * * * * * * * * * * * * * *

style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
----- Original Message -----

style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black">From:=20
title=3DJVernonM@aol.com>JVernonM@aol.com=20

To: href=3D"mailto:beam@sgiblab.sgi.com"=20
title=3Dbeam@sgiblab.sgi.com>beam@sgiblab.sgi.com

Sent: Wednesday, April 19, 2000 =
10:27=20
PM

Subject: Re: Solarizing


In a message dated 4/19/00 11:59:27 PM Eastern Daylight =
Time,=20

TurtleTek@aol.com=20
writes:

> Does anyone know if the Ucoba* can be solarized =
using the=20
Chloroplast SE**?

>  I know of the PM1, the =
D1, and=20
the 1381 DLSE for solarizing. Are these as
>  effective as =
the=20
Chloroplast? Which do you prefer/recommend?
>  =

>  What=20
can and can't the Chloroplast solarize? And if you don't mind, why? =

If=20

>  these are too many questions, don't feel pressured to =
answer=20
them all. Any
>  answer whatsoever is =
appreciated.
> =20

OK, I'll give it a shot.
Yes, the Chloroplast should work fine =
for the=20
Ucoba circuit. Use two of the
large solar cells and a 4700uF cap =
for=20
starters and experiment from there.
I think the Chloroplast will =
solarize=20
just about anything. But, I could be
wrong. The PM1 should work =
too. But,=20
I've had real performance problems with
less efficient motors. The =
D1 will=20
work easy with rechargeable batteries, but
I recommend Wilf's =
SIMD1 for=20
your application. This will give you a nocturnal
bot, but this =
could be=20
interesting as well. The 1381 won't work at all
because it needs =
an=20
inductive load to pull the circuit into activation. A
Bicore or =
BEAMant=20
circuit doesn't provide this. I'm about to tackle this
problem =
myself=20
right now. I have a BEAMant circuit on a good aluminum
platform =
that will=20
be my Zenbot prototype. I'm using Portescaps so I'm going
to try =
the PM1=20
first. But, I plan to compare performance with a Chloroplast
just =
for=20
giggles.

On another topic. The old D1 would be the perfect =
circuit for=20
the avoidance
behavior recently discussed on the list. It's mushy =
start=20
would lend it's
self well to detecting even slight shadows. The =
charge in=20
a super cap could
be dumped into the motors and give a good zip of =
speed=20
away from danger very
similar to what Bob Shannon did with =
Vore-n-more.=20
I'm not sure about enough
speed to avoid a foot fall, but definite =

avoidance behavior or a flight no
fight response could be hooked =
up in a=20
matter of minutes this way. Bob used a
limiting resistor to get =
the bot to=20
pop very rapidly but retain a determined
direction. This sounds =
like a=20
valid first step to a working prototype.

See ya,
Jim
=
href=3D"http://w=">http://www.geocities.com/SoHo/Exhibit/8281/beamart.html">http://w=
ww.geocities.com/SoHo/Exhibit/8281/beamart.html
ICQ#=20
55657870

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