Page 322 · Robotics with the Boe-Bot
√ Cup your hand over the photoresistors, making sure that you are casting equal
shade over both. For best results, the measurements should be in the 200 to 400
range.
√ Record the values of both time measurements in the second row of Table F-1.
Table F-1: RC-Time Measurements in Ambient and Low Light
Duration Values
timeLeft timeRight
Description
Photoresistors in uniform ambient light
Photoresistors in uniform low light
' Robotics with the Boe-Bot - TestPhotoresistors.bs2
' Test Boe-Bot photoresistor circuits.
' {$STAMP BS2} ' Stamp directive.
' {$PBASIC 2.5} ' PBASIC directive.
timeLeft VAR Word ' Variable declarations.
timeRight VAR Word
DEBUG "PHOTORESISTOR VALUES", CR, ' Initialization.
"timeLeft timeRight", CR,
"-------- ---------"
DO ' Main routine.
HIGH 6 ' Left RC time measurement.
PAUSE 3
RCTIME 6,1,timeLeft
HIGH 3 ' Right RC time measurement.
PAUSE 3
RCTIME 3,1,timeRight
DEBUG CRSRXY, 0, 3, ' Display measurements.
DEC5 timeLeft,
" ",
DEC5 timeRight
PAUSE 200
LOOP
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