Alt-BEAM Archive

Message #13402



To: beam@sgiblab.sgi.com
From: BUDSCOTT@aol.com
Date: Thu, 13 Apr 2000 19:44:41 EDT
Subject: Re: Core-less walker


Imagine the possibilities, it be quite easy to make into a phototroph (i
emphisize that too much!), it be really simple to hook up a microcontroller
and be able to give the controller really good control, and its so simplistic
that your can afford to make a mistake!

-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?)



13403 Fri, 14 Apr 2000 10:10:23 +1000 Re: My Nervous Head... beam@sgiblab.sgi.com Elmo I have two words for you........


Eye-Sockets!


They make a helleva difference and often stop that quivering motion that heads
do when they lock onto a light source but they cant move the themselves in
small enough increments to correctly balance the light between both eyes. Thats
when the just sit there and oscillate backward and forward between the two
nearly balanced states.

Make some small tubes....drinking straws work well.....make them about 5mm -
10mm long and place one over each eye. Try experimenting with them pointing in
toward each other (converging sight) or pointing away from each other
(diverging sight).

Elmo



"Dye, Roy" wrote:

> I finally built a PSH based on Wilf's Beam Head tutorial.
>
> It uses the revised PowerSmarHead circuit v1.1, photo diodes, and an escap
> motor.
>
> Its really cool and it tracks light pretty well. However, it seems to
> quiver quite a bit when it locks onto a light source, especially when a
> sufficient amount of ambient light is present. My intent is to have the PSH
> as sensitive as possible, possibly reacting to someone entering the room.
> If I adjust the sensitivity pot to tune out the shakes, the head becomes
> pretty unresponsive to its environment (in my opinion). Is there anything
> else I can do?
>
> One more question: Are LDRs more sensitive that PDs? I think I have read
> threads before about using LDRs over PDs because they can detect changes in
> light better than photodiodes. Does anyone know what the Billy Bass uses
> for its motion detector? It can sense my presence from about 3 to 4 feet
> away.
>
> Don't worry, be happy.
> Roy


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