By Jeran Cloete

Project LED Audience14-15 years old (grade 8-9).Pre-requisite skills Fundamental Mathematics (algebra, calculators, fractions, decimals, SI units, BODMAS). Computer skills Open and close programs, read data on the screen, connect the Arduino.GoalsStudy Newtons lawsUnderstanding Light sensors Using electronics to interface with the physical worldQuantifying the physical worldUsing collected data to determine unknown physical characteristicsLearning ObjectivesObjective A: Measure physical variables and record data (collaborate with other students to measure and record). Apply algebraic equations to collected data. Deduce relationships between physical variables by asking questions and looking for results. Acquire knowledge of fundamental programming building blocks: Variable types (Integers and floats). Communication ports Integrate Calculations into Arduino code.Objective B: Measure different wavelengths of light from various sources See how different surfaces reflect or absorb different wavelengths of light. Notice how ultraviolet light (shortest wavelength) is absorbed and filtered by glass and other surfaces, and lower frequency light is reflected. Prism?Objective C: Construct a basic LED circuit with an LED a resistor and a power supply. Connect it to the ArduinoLearning outcome levelling:

Materials1. Arduino. 2. Computer with USB port. (Raspberry Pi + screen + mouse + keyboard +USB hub).3. 4x LED + 4x resistor.4. Additional LEDs to measure different colours (objective B).5. Breadboards to complete objective C.Links:Arduino Nano (R200):http://www.communica.co.za/Catalog/Details/P1095019467