Pedestrian Crossing Signals
a) Traffic lights with 3-color LEDS
b) Push-to-cross pushbuttons
c) Piezo or miniature speaker ( http://www.adafruit.com/products/1891?gclid=CJ7KnOGCvcQCFS3l7AodBQ8AZg )
d) Optional: LCD Display for text
If no buttons pushed, lights change colors on a pre-determined sequence ( variation on Blink)
If a button is pushed, generates hardware interrupt that starts alternate sequence( see http://arduino.cc/en/Reference/attachInterrupt )
Can add audio and LCD text displays
Have students document the sequence of events for a pedestrian crossing.
Videos: Crossing Signal with feedback https://youtu.be/dXgn1Xo9cRE
Traffic Signal Harvard Square https://youtu.be/y1AIPEkD7_s
b) Push-to-cross pushbuttons
c) Piezo or miniature speaker ( http://www.adafruit.com/products/1891?gclid=CJ7KnOGCvcQCFS3l7AodBQ8AZg )
d) Optional: LCD Display for text
If no buttons pushed, lights change colors on a pre-determined sequence ( variation on Blink)
If a button is pushed, generates hardware interrupt that starts alternate sequence( see http://arduino.cc/en/Reference/attachInterrupt )
Can add audio and LCD text displays
Have students document the sequence of events for a pedestrian crossing.
Videos: Crossing Signal with feedback https://youtu.be/dXgn1Xo9cRE
Traffic Signal Harvard Square https://youtu.be/y1AIPEkD7_s