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Traffic Lights, inexpensive but for safety - Coggle Diagram
Traffic Lights
components
buzzer
leds
micro controller
size
high lights for bridges
big enough to be seen
tall
inputs
sensor to detect cars and people crossing
lights
press button for pedstrians
.
a safe button to press
safety
timed correctly to give time to cross
sensible locations
enviroments
on a road
where people need to cross
costs
inexpensive but for safety