Learning Goals:

1. Students will synthesize the previous lesson for light metering and servo control to design a servo controlled by two photoresistors that will track a light source.

Handouts

• Robotic Sunflower Lesson 3 Student Guide

Group Supplies

• 1 Basic stamp homework board
• 1 Parallax servo
• 2 Photoresistors
• 2 5k Potentiometer
• 2 220 Ohm resistor
• 2 440 Ohm resistor
• 2 2k Ohm resistor
• 2 10K Ohm resistor
• 2 0.01 uF Capacitor
• Jumper wires

Important Links

• Lesson Plan
• BASIC Stamp Software

Next Generation Science Standards

• HS-PS3-1. Create a computational model to calculate the change in the energy of one component in a system when the change in energy of the other component(s) and energy flows in and out of the system are known.
• HS-PS3-3. Design, build, and refine a device that works within given constraints to convert one form of energy into another form of energy.
• HS-ETS1-1. Analyze a major global challenge to specify qualitative and quantitative criteria and constraints for solutions that account for societal needs and wants.
• HS-ETS1-2. Design a solution to a complex real-world problem by breaking it down into smaller,
  more manageable problems that can be solved through engineering.
• HS-ETS1-3. Evaluate a solution to a complex real-world problem-based on prioritized
  criteria and trade-offs that account for a range of constraints, including cost, safety,
  reliability, and aesthetics, as well as possible social, cultural, and environmental impacts.