Fountain Color Changing Lights
This
project was designed for a college fountain. There are four different watercolor
lights, As Red, green, yellow and blue. These lights give eight different color
combination effects, when glows alone or with their adjacent lights. In the
group of two these lights give combined color effects. Delay in between color
change is pre-defined once on PCB, as half minute or one minute by a jumper.
More bulbs can be added with same color or different color to give more combined
effect. IC ULN2804 has built in diode for the relay, which save IC by damaging
due to high fly back voltage. ULN2003 can be used instead of
ULN2804.
Warning!!!
Care should be taken as 220
volts AC voltage presence in the control circuit.
Be
careful
, watercolor lights should have special water proof housing that is intensively
sealed. Any leakage of water inside the housing may cause serious electric shock
of 220
Volts ac and cause fatal to life. So it suggested if you are not familiar to
High Voltage circuits Don’t
try use the high voltage out put circuit ,
If you still
want to try then consider the other alternative out put circuits of high
intensity LEDs in group.
Main
Control Circuit Schematic Diagram
Relay Out Put
Circuit Schematic Diagram
LEDs Arrangement
for the out put Circuits
High
intensity four different color LEDs can be used either for controller
Testing the circuits or for for joiners to try. four LEDs are
grouped to increase intensity of colors.
Power Supply
For
Down loading all in one Zip File Click
Here.