Posted by Circuits Arena on Thursday, 24 December 2015
Traffic Light Signals Circuits Diagram is the artlcle explaining Traffic Light Signals: This Traffic Light Circuit can be used to control traffic on roads or in public places.In a Traffic light there...
Traffic Light Signals:
This Traffic Light Circuit can be used
to control traffic on roads or in public places.In a Traffic light
there are three different color bulb which are Green, Yellow/Amber and
Red.
This project uses IC555 as Astable
Multivibrator for rapid squire wave pulse generation. This clock pulse
is feed to IC 4017 which is a Counter IC. In this counter IC, for every
pulse fed to input pin-14, the High level output keeps shifting from D1
to D9 in cyclic order. See Circuit Diagram below.
Traffic Light Project
At a time one output is higher (Positive) and other output pins of IC remains at low state.
The capacitor and resistor on pin 15 of IC4017 are used to reset the counter to zero (Red light ON) at initial power up.
Part Used:
IC = NE555 ( Timer IC) , IC CD4017 (Counter IC)
Diode = IN4007 6Pcs
POT = 470K
Resistance = 22K, 100K, 220 Ohms X 3Pcs
Capacitor = 0.1 Mfd, 1 Mfd, 10 Mfd.
9 Volt Battery with Snap
Switch, Wire, Clamp, PCB
