ME 3483: Project 2
For this set of problems you need to use the servomotor, photoresistor, and other components, as
needed, from your mechatronics kit.
Problem 1: Using BS2, appropriate circuitry, and PBasic program, make a prototype device that
monitors and controls light condition in a room. During day time, the room is to be kept well-lit
by controlling a window blind. As the evening hours approach, the room is to be kept well-lit by
lighting up light bulbs. At the end of the business day, lights are to be turned off and blinds are to
be pulled down. Use a photoresistor as the light measurement sensor. In addition, use a servo
motor to drive the blind and use a bank of LEDs to mimic light bulbs.
Problem 2: Make a small arm using cardboard, wood, or aluminum and attach it to the
servomotor in your kit using appropriate fasteners. Attach the photoresistor from your kit to the
free end of the arm, facing outward (see Figure). Using BS2, appropriate circuitry, and a PBasic
program, develop a prototype system that positions the arm attached to the servomotor such that
the arm faces a given light source (the light source is restricted to lie in a zone as shown in
Figure).
Light Source
< 5.8 inches
(Laser Pointer)
Arm
Servo Motor
Photoresistor