Three Ways to Make LED Flasher Circuit With Rate Control and Alternate Flashing

Flasher Circuit is a circuit in which the LED blinks ON and OFF at a rate influenced by the capacitor used.

Here, I will show you three different ways to make this circuit using:

1. Transistors

2. 555 Timer IC

3. Quartz Circuit

LDR can also be used to control flashing speed.

Two LEDs can be used to achieve alternate flashing.

These are the Components Required for making the circuit:

1. Using Transistors (0:21)

• Transistors: BC 547 (2)

• Resistors: 47 K Ω (2), 330 Ω(2)

• Capacitor: 10 μF (2)

• LEDs (2)

2. Using 555 Timer IC (1:51)

• 555 Timer IC

• Resistors: 10K, 1K, 330Ω

• Capacitor: 100 μF

• LED

3. Using Quartz Circuit (3:43)

• Quartz Circuit [from wall clock mechanism]

• LED

Other Requirements :

• Battery: 9V and battery clip

• Breadboard

• Breadboard Connectors

These are the Circuit Diagrams for making the circuit using :

• Transistors
• 555 Timer IC
• Quartz Circuit

This video shows step-by-step, how to build all these circuits.