LED Flip Flop Circuit using BC547 Transistors

LED Flip Flop Circuit using BC547 Transistors

In this tutorial, we are going to demonstrate a project of a flip-flop LED flashing circuit using BC547. A Flip-Flop LED flashing circuit is a fundamental circuit that delivers a continuous square wave flashing output. This circuit is commonly utilized for alarming and indicative purposes like in tig welders etc.

In this project, we are utilizing two transistors of BC547. The BC547 transistor is an NPN transistor. In this transistor, a small current of the base terminal of this transistor will control the huge current of the emitter and base terminals. The main function of this transistor is to amplify just for switching purposes. The maximum gain current of this transistor is 800A.

Component Requried 

1. BC547 Transitor 2Pes.
2. 10k Resistor 2Pes.
3. 220uf Capacitor  2Pes.
4. LED 2Pes.
5. Battery 3.7v

Circuit:

Working Explanation

In this section, we are demonstrating the circuit operation of the flip flop LED flasher. A fascinating schematic of this flashing circuit is shown above. The circuit requires a few low-cost components which are easily accessible in the market. The circuit is a flip-flop flashing circuit that starts flashing LEDs individually when power is applied. This LED flasher circuit can be worked with a voltage of 3.7 volts, you can likewise change the voltage of the circuit as per your requirement. Just you need to change the estimations of the current limiting resistors. The flashing rate of the circuit can be expanded or diminished by changing the estimations of R1 and R2 which are 10k. C1 which is 220µF, and C2 which is also 220µF. The circuit is utilizing two broadly useful transistors which are named BC547 NPN transistors.

Applications and Uses

1. The applications and uses of Flip flop LED flashing circuit are:
2. It is also being used for indictive purposes in tig welders
3. Used as indicators in various vehicles.
4. Used in toys to produce flashing lights.