Subject:
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Re: RCX & RIS, a fading glory?
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 30 Jan 2003 21:29:30 GMT
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Viewed:
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4344 times
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In lugnet.robotics, Eric Sophie writes:
> I have this Idea, stick with me, The arm of my robot has a limit at the
> upper and lower extremes. I use The RCX and rotation sensors to keep the
> robot from breaking its own arm. Ocassionally, there is a skip, either the
> RCX or Sensor misses it rotation extreme motor halt que and I have to
> intentervine.
>
> I think it would be cool to have some (small) sort of a self contained smart
> touch sensor at either end of the arms extreme limits.
>
> The circuit would consist of:
>
> Touch Sensor 1 at top of arm
> cross link/wired
> Touch Sensor 2 at bottom of arm
> cross link/wired
> Arm drive motor
>
> When the touch sensors are engaged, the touch sensor overrides the motors
> power source or reverses polarity.
>
> I know you can duplicate this with an RCX, however I could use a system
> smaller that I can incorporate into my Robot aside from the RCX's duties it
> already has.
>
> Like if you were to link the motors power wires and two wires from touch
> sensors at each end of the robots arm.
>
> Auto Bypass circuit reverser do dad thingie.
>
> e
> http://members.aol.com/mylegomaster/
Or, you could do it with the white Clutch Gear, or with a Pulley, or a
Pneumatic Cylinder. :D Each of these prevents your robot from breaking his
arm, and doesn't need sensors. I recommend Mario Ferrari's "Building Robots
with Lego Mindstorms" for mechanical ideas that simplify the electrical
control. (I.e. less sensors, less motors, less programming.)
When it comes to components, I maintain that making "cheap" (haha, as if)
ROM bricks with leds and knobs that interconnect to a big "flowchart"
cluster will certainly not solve Spybotics' problem. Especially since each
code block comes for free in the RIS SDK.
The problem is each Spybot costs $90 and doesn't do much. All Lego has to do
is change that. I repeat that they should make a "big component" with more
useful features that kids like, for example a mini-RCX w/ a mike &
flashcard. It could have a motor axle and a touch sensor sticking out its
ends, a couple program-controlled LEDS, and an IR link. Lego should sell
this separately, so each Spybotics set would only cost the price of the
"normal" bricks. Then you could start with a $40 mini-RCX and pay $25 for
each Spybot - or Star Wars bot - or use it with a train set.
If the kid couldn't learn RIS, with each Spybot would come a bunch of
programs of CD, so he'd only need to know how to insert a CD and down it
would load :D
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Message is in Reply To:
 | | Re: RCX & RIS, a fading glory?
|
| I have this Idea, stick with me, The arm of my robot has a limit at the upper and lower extremes. I use The RCX and rotation sensors to keep the robot from breaking its own arm. Ocassionally, there is a skip, either the RCX or Sensor misses it (...) (24 years ago, 30-Jan-03, to lugnet.robotics)
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