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