Light Sensor
The light sensor, mounted on the front of Pro-Bot, is sensitive to changes in the light
level in the room. When the room lights go dark (below about 50 lux), procedure 35
DARK will be run. Similarly, when the room lights come back on (more than about 350
lux), procedure 36 LIGHT will be run.
TIP: Why not switch Pro-Bot’s headlights on when the room goes dark, and switch
them off again when it gets light?:
In procedure 35 DARK: “Light On”
In procedure 36 LIGHT: “Light Off”
Then watch the headlights go on and off when the room lights are switched off while
running your main program. Perhaps your main program is drawing a square?
Sound Sensor
The sound sensor, mounted underneath, is sensitive to short sharp sounds such as a
hand clap or a shout. It is only enabled during pauses so that the sounds of the motors
do not accidentally trigger the sensor. You may want to insert a brief pause after every
command – go to the Configuration menu and check that it says “Pause On” in the
“End of Command” menu entry. If you do that, there will be a brief period after every
command when the Pro-Bot will listen for your instruction.
Alternatively, you could insert a pause for a fixed length of time at the beginning of the
program, or at specific points where you want the Pro-Bot to wait for you.
TIP: Insert a Pause 499 at the start of your program. When you press Pro-Bot will do
nothing until you clap, or shout at it, then the program will start running.
You don’t even have to put anything into the Procedure 37 SOUND for this to work!
Examples Using Sensors
Example 1: Turning lights on when going through a tunnel
Press followed by New Procedure
Select Procedure 35 ‘Light to Dark’ [35 DARK] using scroll keys
Press and hold the button to access the special commands menu.
Select ‘Light On’
Press again
Select procedure 36 ‘Dark to Light’ [36 LIGHT]
Press and hold the button to access the special commands
Select ‘Light Off’
Press to return to the main screen
At the main screen, program Pro-Bot to move forward by pressing the forward arrow
several times
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