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traffic lights - Coggle Diagram
traffic lights
components
led
microcontroller
buzzer
environment
on a road
good location -not in a blind spot
where people need to cross
output functions
lights
buzzer for crossing
timer for crossing
asthetics
easily seen in any direction
black body to contrast with lights
inputs
press button for pedestrians
sensor to detect cars
cost
installation cost
production cost
safey
size
big enough to be easily seen