Create a Flashing Lights Circuit With a 555 Timer and a Relay
Intro: Create a Flashing Lights Circuit With a 555 Timer and a Relay
I'm gonna you how to make a alternating pulsating circuit (using 555 timer) to run a relay.
Depending on the relay you may be able to run 120vac light.
It does not alternate that good with small capacitor(I will explain later on).
Depending on the relay you may be able to run 120vac light.
It does not alternate that good with small capacitor(I will explain later on).
STEP 1: What You Will Need.
-1 5 pin relay (5 vdc)
-Ceramic capacitor(For reducing arcing on the relay)
-1 red LED(optionnal)
-1 green LED(optionnal)
-2 110 ohm resistor(to go with LED)
-10 to 1000 uf electrolitic capacitor
-2 1k ohm resistor
-1 555 timer
-perf board
-wire
-soldering iron
-solder
-wire cutter
-Ceramic capacitor(For reducing arcing on the relay)
-1 red LED(optionnal)
-1 green LED(optionnal)
-2 110 ohm resistor(to go with LED)
-10 to 1000 uf electrolitic capacitor
-2 1k ohm resistor
-1 555 timer
-perf board
-wire
-soldering iron
-solder
-wire cutter
STEP 2: The Circuit
The red LED is to indicate power and the green LED is to show the speed that it is pulsing at.
I would suggest using a 330 uf electrolytic capacitor(this capacitor will determent the speed at witch the relay is pulsing the bigger the capacitor the slower the pulsing).
(Small capacitor don't alternate good, they don't give anoff time for the light to stay on.)
I would suggest using a 330 uf electrolytic capacitor(this capacitor will determent the speed at witch the relay is pulsing the bigger the capacitor the slower the pulsing).
(Small capacitor don't alternate good, they don't give anoff time for the light to stay on.)
STEP 3: Now Your Done!
I would suggest putting this in a project box.
You can pulse lights, motor and other ,anything you relay can withstand.
You can pulse lights, motor and other ,anything you relay can withstand.
18 Comments
afb1966 11 years ago
foxtrotbravoone 12 years ago
I am planning to buld a 10 x 3W amber led bulb night rider type system, with 5 on each side of my 4x4.
Could anyone help by suggesting a good layout as Im kind of new to all this but keen to learn.
I am planning to use a 9V battery by the way.
Thanks.
steven123654 11 years ago
You will need to add transistor where the LEDs are to power your 3watts LEDs.
I wont tell you how to put the transistors in that circuit do some reasurch on how they work (many good site out there) (here a hit use NPN type transistors)
A 9volt battery wont have the power for your circuit use the vehicles power.
Good luck!
Steve
CFW 11 years ago
did you build your 'Knight Rider' lights on your 4x4?
Would like to hear about the circuit you used.
If you still interested in building it, let me know.
I have some ideas.
Regards,
Carl
tuscani 13 years ago
agis68 15 years ago
suteke 14 years ago
agis68 14 years ago
Renagade 15 years ago
steven123654 15 years ago
steven123654 15 years ago
javier7high 15 years ago
Renagade 15 years ago
Renagade 15 years ago
SurferGeek 16 years ago
GorillazMiko 16 years ago
steven123654 16 years ago
GitarGr8 16 years ago