Alt-BEAM Archive
Message #07917
To: "'beam@sgiblab.sgi.com'" beam@sgiblab.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Mon, 22 Nov 1999 22:19:30 -0800
Subject: [alt-beam] Re: psh question #3
Sure thing Justin,
If you have four HC240s or two HC245s you can use this circuit : one 245
would replace the two 240s in series.
<>
It generates two low outputs when the head is centered and one low in the
direction of continuous turning. I am curious how you will use these
signals. If it is a "head leads:body follows" design, I assume that you will
use some springs or a stop to tension the head rotation with respect to the
body allowing maybe 90-180 degree of freedom and generating error signals
until the body is facing the right way. Alternatively you design or I could
suggest some circuits that do not require springs.
Have fun!
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: BotDoc [SMTP:botdoc@yahoo.com]
> Sent: Monday, November 22, 1999 5:37 PM
> To: beam@sgiblab.sgi.com
> Subject: psh question #3
>
> Thanks Wilf,
> I am wondering if it is possible to be able to
> control 2 enable pins with this type of circuit. What
> I am trying to do is have both of the enable pins on
> another IC low when the head is locked on, then when
> the head turns one direction it raises the voltage of
> one enable pin, turning that side off. I am just
> trying to control the enable pins of the hemicore
> circuit I posted a while ago to make my walker
> phototropic, it turns just fine by toggling the
> enables. It would be nice to put a head on it. The
> balancing and everything is fine with the head on the
> body, if I could only get them to communicate with
> each other. Thanks again
> Justin
>
> =====
> A motor is a robot waiting to happen
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Attachment: pshaux1.gif
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