Subject:
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RCX Output
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 15 Dec 1999 16:14:02 GMT
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Original-From:
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Avery, Amos E. <AMOS.E.AVERY@DISNEYsaynotospam.COM>
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Viewed:
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405 times
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--- Nick Taylor <ntaylor@iname.com> wrote:
> If I'n not mistaken, the RCX output is pulse width
> modulated to control motor speed, while the train controller
> varies the DC voltage.
Can anyone confirm the output characteristics of the RCX?
It is my understanding that PWM is used to control RC servos
and not to power them. Has anyone put a scope on the RCX's
outputs to see what they look like? If the info is available,
I'd be interested to know the exact output specs (eg. 0-9v 200ma).
F'amos
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Message has 2 Replies:
 | | Re: RCX Output
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| Hi F'Amos, I just now put a scope on the motor output ran an NQC motor test program. At OUT_FULL the motor output is about +7V DC. At OUT_LOW the motor output is a pulse train of 1ms 7V pulses at about 125Hz. The low level depends on the motor load (...) (25 years ago, 15-Dec-99, to lugnet.robotics)
| | | Re: RCX Output
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| So if you need a 1, 1.5 & 2ms pulse for controlling a servo and you said the low setting in NQC = a 1ms pulse, are there other matching motor speed settings to get a 1.5 or 2ms pulse? (...) Joel Shafer joel@connect.net (25 years ago, 15-Dec-99, to lugnet.robotics)
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