Newsgroups: comp.robotics,sci.electronics
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!news2.near.net!news.mathworks.com!hookup!swrinde!pipex!uunet!nih-csl!arm
From: arm@helix.nih.gov (Andrew_R._Mitz)
Subject: Re: Monitoring robot heartbeat
Message-ID: <1994Dec22.040316.6099@alw.nih.gov>
Followup-To: comp.robotics,sci.electronics
Sender: arm@helix.nih.gov
Organization: National_Institutes_of_Health
References: <3d4gnn$ndj@cantaloupe.srv.cs.cmu.edu>
Date: Thu, 22 Dec 1994 04:03:16 GMT
Lines: 15
Xref: glinda.oz.cs.cmu.edu comp.robotics:16502 sci.electronics:112639

In article <3d4gnn$ndj@cantaloupe.srv.cs.cmu.edu> tjochem@ri.cmu.edu writes:
>Hi. We want to monitor a robot's heartbeat signal (0/5V ttl signal), and shut 
>off some motors when it disappears (stops transitioning from 0->5 of 5->0) for 
>some period of time. We have some initial ideas about how to do this in 
>hardware, but would like to hear how any of you have done similar things. 
>Thanks
>
How regular is the heartbeat?  Is the period fixed?  How much time or
how many beats represents a diappearence?

-- 
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Andrew Mitz, Biomedical Eng., National Institutes | Opinions are mine alone 
of Health Animal Center, Poolesville, MD          | arm@helix.nih.gov       
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