Traffic light has a buzzer to inform the pedestrians the clear passage to cross the road with of course the light indicator. Also we add a feature that enhances the brightness of the indicators.
The Q0-Q5 are the transistors. D0-D5 are the adalm signals.
Q5 is a transitor for the photo resistor to make a twilight sensor (day/night switch)
· The specification of sequence that is required had been made using basic programming language (0-1). With that we create 5 outputs, 3 for the cars indicators (red, yellow, green), 2 for the pedestrian indicators (red1, green1) and 1 for the speaker when the green pedestrian indicator is on it will beep in a certain pattern. To be more accurate since the whole project is short scale of a traffic light, the sequence is quick and demonstrates how it the traffic light works. To specify the pattern furthermore, when the red indicator is activated the green1 indicator is also activated along with the buzzer that will have a unique independent sequence independent. After certain time, red become inactive along with green1 and buzzer, giving the turn to the green indicator and red1. When time passed the green light became deactivated and giving the turn to yellow. After that, the loop continues.