Subject:
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Use a RCX as a Sensor port AND a Motor Output!
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 26 Aug 1999 09:44:05 GMT
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Reply-To:
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NOSPAM-DCCHEN@PACBELL.spamlessNET-NOSPAM
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Viewed:
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661 times
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So, I was messing around w/ the RCX and hooked up a Micromotor to one of
my output ports and lo and behold....I could control the motor by
toggling the Sensor Type for that port between a Passive (None, Switch,
Temp) mode = OFF and an Active Mode (Light, Rotation) mode = ON.
Cool, an extra motor output off of a sensor port! Unfortunately, I
don't seem to be able to run a full size Technics Motor (the geared one)
off of the same scheme.
All the same, using RcxCC (GREAT PROGRAM!!! btw) I accessed the direct
controls setting the port to various modes to see what would happen. I
also paralleled a Touch Switch and to the Micromotor to see what would
happen, here's what I found:
(Numbers represent readings on RCX screen for that Port, Temp readings
appear useless. +/- = amplitude of variability around an inconsistent
number)
Sensor Setting: Passive (None, Switch, Temperature)
Micro Motor Only Reading
MOTOR IS OFF -------
Mode Setting: Raw 14-16
Boolean 1 spinning the motor gives no change
Trans 0 " " " " "
Period 0 " " " " "
Percent 100 " " " "
Celcius 9999
F 9999
Angle 0
Sensor Setting: Active (Light/Angle)
Micro Motor Only Reading
MOTOR IS ON -------
Mode Setting: Raw 1023, lower as slowed, down to below 30 when motor
stalled
Boolean 0 while running, 1 when stalled
Trans +1 with each transition to on->off or off->on
Period +1 with each transition of on->off->on or vice versa
Percent 0 while running, 100 when stalled
Celcius 9999 w/ brief transition to random temp when going from
F stalled state to running state (not consistent)
Angle 0, 1 occasionally when transitioning from stalled to moving
(also not consistent)
Sensor Setting: Passive (None, Switch, Temperature)
Micro Motor+Switch Reading
MOTOR IS OFF -------
Mode Setting: Raw 14-16 (Switch OUT), 7-9 (Switch IN)
Boolean 1 Switch or spinning motor has no effect
Trans 0, Switch state has no effect
Period 0 " " " " "
Percent 100 " " " "
Celcius 9999
F 9999
Angle 0
Sensor Setting: Active (Light/Angle)
Micro Motor+Switch Reading
MOTOR IS ON -------
Mode Setting: Raw 1023 w/ Switch OUT, lower as slowed, < 30 when motor
stalled
slower + < 800 w/Switch IN, lower as slowed, < 10 stalled
Boolean 0 while running, 1 when stalled, Switch IN slows motor
Trans +1 with each transition to on->off or off->on, Switch ignored
Period +1 with each transition of on->off->on, Switch also ignored
Percent 0 while running, 100 when stalled, > 40 with Switch IN
Celcius 9999 w/ brief transition to random temp when going from
F stalled to running state, < 40 C or < 100 F when Switch IN
Angle 0 while running, -1 with Switch IN, but can be additive
(also not consistent)
It's getting late, will test out combinations of MicroMotor + Light
Sensor or Rotation Sensor later.
Hope you find this interesting, sorry about the long post.
Dave
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