Alt-BEAM Archive
Message #09050
To: beam@sgiblab.sgi.com
From: Dave Hrynkiw dave@solarbotics.com
Date: Tue, 11 Jan 2000 16:04:14 -0700
Subject: [alt-beam] Re: Nv speed?
At 03:48 PM 1/11/00 , blake marks wrote:
>I have a question.... is it possible to change the speed that it takes
>for one Nv process to travel through a loop. how would you do that???
>change the caps?,, if anyone has any info on this i would love to have
>it. thanx
You mean ALL the Nv's traveling through a particular part of a loop, or you
want to slow down a selected one process occasionally?
In general, you CAN put in bigger caps, or bigger resistors to tweak the
timing. Hope this is what you were after!
Regards,
Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com
9051 Tue, 11 Jan 2000 18:30:58 -0500 (EST) [alt-beam] Re: photopopper head? beam@sgiblab.sgi.com jester96beam@iname.com You could probably attach out for the motors to the inputs of an H-Bridge. Now you have a phototropic head (if the mechanics are right). The only problem would be if BOTH SEs want to fire at once, but this is very rare. There is away to adjust the H-Bridge with a diode to fix this problem, but I can't remember what it is. I'm sure someone else here knows.
Chris
---- you wrote:
> But a photopopper never backs up.
>
> How would the head turn in both directions in this case?
>
> Evan Dudzik wrote:
>
> > it could... should work fine.
> >
> > --- johannes urke
> > wrote:
> > > i was wondering since i now have a photovore brain
> > > from chiu`s tutorial done
> > > if it could be connected to one motor making it a 1
> > > dof head?
> > >
> > ______________________________________________________
> > >
9052 Tue, 11 Jan 2000 16:45:13 -0700 [alt-beam] Re: Nv speed? beam@sgiblab.sgi.com "John A. deVries II" At 03:48 PM 1/11/00 , blake marks wrote:
>I have a question.... is it possible to change the speed that it takes
>for one Nv process to travel through a loop. how would you do that???
>change the caps?,, if anyone has any info on this i would love to have
>it. thanx
>blake
Presuming only one process and a single, simple loop, the amount of time it
takes is the sum of the delays of all of the individual Nv neurons.
For example, I've got a hexcore in my office (ran for at least half a year
on 4 AA's, btw) that uses the same sort/size of capacitor for all six
Nv-s. Five of the neurons have 1 M ohm resistors and the sixth has a 10 M
ohm resistor -- very generally speaking it is easier/more stable to muck
with the resistors than the capacitors. The total time through the loop is
approximately 15 tau, where tau is the delay of one neuron (perhaps tau=.2
seconds --> roughly 3 seconds for the entire loop).
Does this help?
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