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Heat Distribution and Robot Sensors Projects
Information provided by Will Plachno. This was done as a science fair project.
The complete report (in acrobat format) can be viewed here: Wood Stove Heat Distribution report
 The purpose of this experiment is to find out how to distribute the heat from a wood stove (fireplace) throughout the room evenly. For my experiment I built a test apparatus to automatically measure the temperature from 8 evenly spaced thermometers. The thermometers are spaced 1.5 feet from each other attached to a 12 foot stick. The Stamp reads the temperature and stores the values in a memory. When done, the Stamp can be disconnected from the apparatus and hooked up to a PC so that the data can be transfered and plotted.
 I used a Parallax BS2P stamp with the BS2P Demo Board. The thermometer chips were DS1620 (8 total). The enable pins to the DS1620 3-wire interfaces are all controlled through one PCF8574 I2C chip. Two hours of temperature data is stored in a 2432 (shared on the same I2C wires) memory chip. After taking the measurements I used the Stamp Plot Pro software to load the data into a PC and to plot it out. The report contains the full software listings and design description.
Note: Click images thumbs for a larger image
Information provided by Will Plachno. This was done as a science fair project.
The complete report (in acrobat format) can be viewed here: Sound versus Light Distance Measurement report
 The purpose of this experiment is to find which sensor (Infrared light or Ultrasonic sound) detects walls more acurately. For my science fair experiment, I built a test apparatus that would measure distance using both infrared and ultrasound. I programmed a BASIC Stamp® BS2p module to do the distance measurements. For the ultrasonic, I used a Daventech SRF04 Ultrasonic Range Finder. It provides me the time it takes the sound to travel to the object and back. I multiply this time by the speed of sound and divide by two (for the echo) to get the distance measurement to the object. For the infrared, I used a detuning method to measure the distance. The receiver expects the IR light to be flashing on and off at 40KHz. I change the transmitted frequency using a NE555 oscillator. The Stamp controls the frequency of the NE555 by using a DS1267 digital potentiometer. I calibrated the DS1267 numbers to the distance. I then used the calibration numbers inside the program to output the measured distance for any object.
 I used a Parallax BS2P stamp with the BS2P Demo Board. I used a separate bread board to hold the Infrared diode, sensor, and the SRF04. The NE555 oscillator and the DS1267 digital resistor are placed on the BS2P Demo Board. The report contains the full software listings and design description.
Note: Click images thumbs for a larger image |
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