LED Flasher Circuit With Relay

Introduction:

Today during this text we are becoming to form a LED Flasher circuit with a Relay. this is often a simple circuit based upon a Multi-Color LED and a General NPN Transistor. So, Let’s make this easy circuit.

How does the circuit work?
Here we are giving 3v to 5v to the circuit. The Multi-Color LED is connected with the rock bottom of the Transistor. The LED changes its color. So, for this reason, the Transistor triggers and thus the relay turns On/ Off while changing the color. For this triggering, the Relay also triggers.

As a result, the load which is connected with the Relay also triggered. For the Load, I even have used 2 LEDs. one of the LED is connected with the NO Pin and thus the opposite pin is connected with the NC Pins. Here NO means Normally Opened and thus the NC means Normally Closed Terminals.

Here you'll also connect any load with it. it is a relay so it can handle much higher loads than Transistors. like you'll control 100W Lights easily. So, this is often an easy and Power efficient way of Flashing LED.

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Components Lists From Utsource:

BC547 Transistor: https://www.utsource.net/itm/p/382309.html

LED: https://www.utsource.net/itm/p/6831354.html

Resistor: https://www.utsource.net/itm/p/8328095.html

Capacitor: https://www.utsource.net/itm/p/1898386.html

Relay: https://www.utsource.net/itm/p/9510225.html

Tools Needed:

Soldering Iron: https://www.utsource.net/itm/p/8423764.html

Iron Stand: https://www.utsource.net/itm/p/7722853.html

Nose Pliers: https://www.utsource.net/itm/p/7671655.html

Flux: https://www.utsource.net/itm/p/8423764.html

At first Pre-Tin the Legs of the Transistor with a tool. And also here are the pinouts of the BC547 Transistor. you'll also read our other BC547 Projects.

Here I’m using 6V relay. The relay can also be operated with 5V. Here are the pinouts of the 6V relay. There are 2 Coil Pins and three Contact Terminal Pins. One is common and thus the opposite 2 aren't any & NC. The NO & NC stands for Normally Opened and Normally closed respectively.

No more Introduction. So, Let's connect all the components together. First, Connect the Collector pin of the BC547 Transistor with the Relay coil Pin.

Now take a Multicolor LED then connect it with the circuit. More precisely connect the LED +ve with the other Relay terminal and connect the -ve of the LED with the Transistor's Base.

Now take One RED LED and one Green LED. Bend the two LED's -ve with each other. Now connect the +ve's of the LED with the NO & NC Pin Respectively as shown within the image. confirm that you simply rate connecting in right polarity otherwise the LEW won't run.

Now connect a 220R resistor with the LED -ve and thus the Transistor's Emitter Pin as shown within the image. Here you've to supply 3V to 5V supply. In my case, I even have used a 3.7v 18650 LI-Ion Battery. Here you will see the LED is Flashing.

Note:

The circuit is based upon Relay. The Relay could also be a robot it works but there is a big noise that comes from it. So, you need to look out for these kinds of things. Flashing is completed by the Multi-color LED. so if the LED is broken then the circuit won't work. Please don't use a voltage above 5V. otherwise, the Multicolor LED is getting to be damaged and thus the Relay coil could even be heating up quickly.