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Counting On The Tried And True Schmitt Trigger
For this year's Science Olympiad competition held in my home state of North Carolina (http://www.sciencenc.com), my team was challenged to build an electric vehicle that would go a given distance and then stop. Our first car used a 555 timer circuit, but it did not give u s the accuracy we wanted. To be effective in the state competition, we needed a much better way to actually measure the distance the car went. Since we had built the car using the Vex Robotics kit from Innovation First...
SERVO Magazine (October 2008)
By Margaret Toebes