BASIC TRAFFIC LIGHT

this simplest circuit are based on d original operation of a COLOR CODE TRAFFIC LIGHT SYSTEM showed in d street road..

sunod na nku ni sumpayan tinatamad aku (^_^)

CIRCUIT DIAGRAM:


COMPONENT PARTLIST:

R1 = 5.1 kilo ohm
R2 = 330 ohm
C1 = 470uf/16V or 1000uf/16V
D1- D9 = 1N4001 / 1N4148
Q1- Q3 = 2N3904 / 2N2222A General purpose
K1-K3 = 12V SPDT Relay
B1 - B3 = Pilot Lamp (RED, GREEN & ORANGE)
IC1 = LM555 timer ic
IC2 = 4017 Counter ic


TAKENOTE:

for delay responds of changing the light sequence: change the value of d Capacitor (C1) into a higher one & see d result (e.g: 470uf/16V,1000uf/16V, 2200uf/16V & etc...)

ano po sequence ng kulay niyan?

kng sa diagram..

red -> orange -> green
tapos balik ulit sa red

akala ko back uli sa orange. hehe salamat po sa pagsagot.

uu nga noh... sori my mistake...

dadaan muna pla sa orange..
ksi pingadugtong ko na ang pin10 at 11

ang sequence nga pla ay 3, 2, 4, 7, 10, 1, 5, 6, 9, at 11

recheck ko na lang uli.

basa mona..