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Contents Table of Contents Preface ............................................................................................................................................. 3 Audience and Teacher’s Guides.......................................................................................................................................... 3 Copyright and Reproduction .............................................................................................................................................. 4 Special Contributors ............................................................................................................................................................ 4 Experiment #1: Temperature Transducer............................................................................................ 5 Parts Required....................................................................................................................................................................... 6 Build It...................................................................................................................................................................................... 6 Temperature Transducer..................................................................................................................................................... 8 Morse Code ..........................................................................................................................................................................10 Challenge! .............................................................................................................................................................................22 Experiment #2: Data Logging............................................................................................................ 23 Parts Required.....................................................................................................................................................................24 Program It.............................................................................................................................................................................25 Advanced Topic: Detecting a Double-Click ....................................................................................................................30 Learning to READ and WRITE, the Basics ........................................................................................................................32 Talking Thermometer, Morse Code Revisited................................................................................................................36 Challenge! .............................................................................................................................................................................44 Experiment #3: Temperature Probe for Micro-Environments ............................................................ 47 Parts Required.....................................................................................................................................................................47 Analog Temperature Sensor .............................................................................................................................................48 BASIC Stamp Pins, Capacitors, Review of the BASICs .................................................................................................49 Simple Resistance Detector..............................................................................................................................................51 Resistance Detector Using RCtime..................................................................................................................................55 Temperature Sensor Probe Using the AD592 and RCtime.........................................................................................57 AD592 Calibration...............................................................................................................................................................60 Talking Thermometer Revisited, Two Channels.............................................................................................................64 Automatic Calibration (Advanced Topic) ........................................................................................................................66 Some Earth Measurements Temperature Experiments..............................................................................................69 Challenge...............................................................................................................................................................................72 Earth Measurements Student Guide Version 1.2 • Page 1 Contents Experiment #4: Light on Earth and Data Logging................................................................................ 75 Parts Required .....................................................................................................................................................................76 Photodiode as a Light Transducer ...................................................................................................................................77 Photodiode and the BASIC Stamp as a Digital Light Meter ........................................................................................86 Temperature and Light Meter...........................................................................................................................................91 Light and Temperature Logger, Using RAM Memory....................................................................................................92 Experiments with the Data Logger ..................................................................................................................................97 Challenge! ...........................................................................................................................................................................100 Experiment #5: The Liquid Environment .......................................................................................... 101 Introduction .......................................................................................................................................................................101