Subject:
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Re: LEGO Purism
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 10 Aug 2002 13:36:09 GMT
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Viewed:
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3607 times
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In lugnet.robotics, sjbaker1@airmail.net writes:
> Steve Hassenplug wrote:
> > > I too like working within the existing constraints. It makes you creative.
> > > Still. I'd kill for a stall sensor.
> >
> > One way to do this, without adding any hardware is to check the internal
> > battery voltage. I'm not sure if it's possible with the standard firmware
> > v2.0 (it wasn't possible with 1.0/1.5) but you can do it with replacemet
> > firmware, like BrickOS (formerly LegOS).
> >
> > I've done it and had a great deal of success. When the internal battery
> > voltage drops, there is some additional drain, like stalled or stressed motors.
> >
> > You have to keep the 'normal' voltage up to date, and you also have to
> > ignore starting and stopping, but it does work.
I don't suppose you have some code for this do you? I tried this some while
back with no success :-(. I found that the battery voltage seemed to
fluctuate too much for me to be able to detect a stall condition with any
degree of certainty.
Still, the robot and software were a little complex. Maybe I should try it
again in a more controlled setup (less software and just one motor attached
to a brick for example).
Anyhow, seeing some code that actually works would be helpful.
Regards - Paul
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Message is in Reply To:
 | | Re: LEGO Purism
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| (...) Neat! I guess the only drawback is that you don't know *which* motor stalled - but most applications can probably live with that. Anyway - you *CAN* do this with the RCX 2.0 firmware. In NQC, you can call x = Batterylevel () ; ...the result is (...) (24 years ago, 9-Aug-02, to lugnet.robotics)
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