We can change the speed of blinking by changing the value of capacitance.ĥ55 timer IC is the cheap, popular and precise timing device used in various applications. The duration of ON/ OFF depends on the time cycle of the square wave. The Blinking LED circuit uses a 555 timer in astable mode, which generates a continuous output in the form of a square wave at pin 3. Physical Diagram Blinking LED Physical diagramĥ55 timer IC is used to create time difference in various applications.
Finally, connect the battery leads with the breadboard to start the power supply in the circuit.Connect pin 8 to the positive end of the battery.Connect pin 7 to the positive end of the battery using a 1kΩ resistor.Connect pin 6 to pin 7 using a 470kΩ resistor.Connect pin 4 to the positive end of the battery.The negative lead of LED needs to be connected with the ground. Connect the output pin 3 with the positive lead of the LED using a 1kΩ resistor.Now short the pin 2 to pin 6 of the 555 timer IC.Connect the negative lead of the capacitor to the ground of the battery. Connect pin 2 to the positive end of a capacitor. The longer lead of a polarized capacitor is the positive and the shorter lead is negative.You can find the pin structure of a 555 timer IC in the circuit diagram shown above. Connect pin 1 of a 555 timer IC to the ground.Collect all the required components and place the 555 timer IC on the breadboard.
Here in this configuration, the 555 timer IC has connected in an Astable mode of 555 timer operation. The following circuit design explains the design of the blinking LED (Light Emitting Diode) with the 555 timer IC. Blinking LED Circuit Using a 555 Timer IC
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