Please enable JavaScript.
Coggle requires JavaScript to display documents.
traffic lights - Coggle Diagram
traffic lights
cost
make it cheap
cost effective
production , insulation
saftey
aesthetics
black body for contrasts
easily seen for any direction
components
LEDs
main controller
buzzer
motor
original function
lights
timers for crossings
buzzer crossing
tactile crossing - good place to cross.
safety
safe to press button
timed correctly
make sure that the button goes at the right time
size
big enough to see
high enough to see from a distance
inputs
press button for crossing
sensor to detect cars