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just to be clear, there are two types of LEGO sensor: active and
passive:
* passive -- touch sensor, temperature sensor.
* active -- light sensor, rotation sensor (aka shaft encoder, angle sensor)
without expansion board, the HB can only deal with the passive
sensors.
with expansion board, you also can use the active sensors. the active
sensors are somewhat sophisticated, you alternately charge them to +9v
and then read back their value. this must be done repeatedly -- the
HB does it at 250 hz -- to maintain counts with the rotation sensor.
fred
In your message you said:
> The LEGO sensors and the RCX are the same thing. The standard Handy
> Board (without an expansion board) can handle all of the passive LEGO
> sensors such as the touch and rotation sensors. The expansion board
> is needed to use the active sensors such as the light sensor and
> others that have been developed by the sensor experts like Michael
> Gasperi and others. The big advantage of the expansion board is the
> ability to directly control R/C servos as well as the active LEGO
> sensors.
>
> Good luck and have fun,
> - Nick -
>
> Scarius wrote:
> >
> > Some of the expansion board kits (all? sorry, haven't been paying much
> > attention to the extension boards yet) mention that they have slots for
> > LEGO style sensors. Does this mean the sensors they use on their
> > RCX/Mindstorms stuff? What's the difference, are the LEGO sensors based
> > around different voltages as opposed to normal Handyboard sensors? We've
> > been using LEGO motors (but not sensors) in our lab, is there a
> > difference there as well? Somewhat obviously, I don't know much about
> > electronics :)
>
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| The LEGO sensors and the RCX are the same thing. The standard Handy Board (without an expansion board) can handle all of the passive LEGO sensors such as the touch and rotation sensors. The expansion board is needed to use the active sensors such as (...) (25 years ago, 9-Jan-00, to lugnet.robotics.handyboard)
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