Page 63 - The Unofficial Guide to Lego Mindstorms Robots

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Figure 3-7.
Programming Trusty with two light sensors

Online Resources

L EGO World Shop

h ttp://www.legoworldshop.com/
The RIS kit itself is available at this online store, although you can probably get it cheaper at a local retailer. However, the
online store also carries items you won't find locally, like extra motors, touch sensors, light sensors, and even a remote control
that sends messages to the RCX's IR port. You can even buy an extra RCX, although it's a much better value to spring for a
whole RIS kit.

LEGO MINDSTORMS Sensor Input

h ttp://www.plazaearth.com/usr/gasperi/lego.htm
This is the authoritative resource for RCX sensor information. It describes how the sensors work, how you can modify sensors,
an d how you can build your own sensors. It includes schematic diagrams, handy graphs, and photographs.

LEGO Light Sensor

http://www.plazaearth.com/usr/gasperi/light.htm
For the real skinny on LEGO's light sensor, check out this page. It includes a photograph of the circuit board inside the sensor,
a schematic diagram, and graphs of the sensor's response with and without the LED.