About This Project

In this tutorial, we learned how to make a Blinking LED using Astable Mode of 555 timer IC.

Project Info

  • Difficulty: Easy
  • Estimated Time: 2 Hrs.
  • Category: Breadboard
  • Tags: 555 timer IC, LED, Breadboard, Battery, Resistor, Jumper wire.

Watch the video here.

Introduction

An automatic night lamp turns ON and OFF automatically without the need for human intervention. This lamp senses the light intensity from surroundings and finds whether it’s day or night. It turns ON automatically when its dark around and it turns OFF when it receives light from its surroundings.

The LDR sensor is used to detect the intensity of light. The lamp can be aptly used in outdoor settings like streets, gardens, and public places where it is difficult to appoint a person to operate the lights. In this tutorial, we have tried to cover different aspects of 555 Timer IC and explain its working.

What is an Astable Mode of 555 timer IC?

Astable mode is the commonly used mode of 555 Timer IC. In astable mode, the 555 timer uses a resistor and capacitor to create a cycling function. By changing the values of two resistors and a capacitor connected to the chip, we can adjust the frequency of the wave. The values of the resistor and capacitor help in determining the timing the of repeatable circuit. Making Blinking LED using Astable Mode of 555 timer IC is super easy. Let’s learn how to make a Blinking LED.

Project: Making Blinking LED using Astable Mode of 555 timer IC

Components Required

Image Component Quantity
Breadboard 1
555-Timer-IC 555 Timer IC 1
led-light LED 1
resistor Resistor 1
Capacitor Capacitor 1
battery Battery 1
jumper-wire Jumper Wires 5-6
battery-holder Battery Holder 1

Building Guide

Step 1: Circuitry of the Robot

  • Powering the components
  • Powering the 555 timer IC
  • VCC to 5V
  • GND / to GND
  • Output to LED positive pin.
  • LED pins
  • Negative to GND.
  • Positive to Output of 555 timer IC

Step 2: Assembly

  • Assemble all the components required

blinking-led-using-monostable-mode-of-555-timer-ic

  • Connect 555 timer IC on the breadboard.

Connect-555-timer-ic-on-the-breadboard

  • Working and connection of a 555 timer IC.

working-and-pin-configuration-of-a-555-timer-IC

  • Connect wires from the 8th pin to the negative and the 1st pin to the positive on the breadboard.

  • Again from the 4th wire connect a wire to the 8th pin.

wire-connect-a-wire-to-the-8th-pin

  • Now, short the trigger pin with the threshold pin.

  • Connect a capacitor positive pin to the 2nd pin of 555 timer IC and the negative of the capacitor to the negative on the breadboard.

connect-a-capacitor-positive-pin

  • Connect 2 resistors like this from 6 number pin.

connect-2-resistors-on-the-pin-6

  • Connect positive of LED to the 3rd pin in 555 timer IC and negative of LED resistor to the negative on the breadboard.

connect-the-positive-terminal-of-the-led

  • Power up the breadboard by providing positive and negative supplies.

  • Connect a resistor from the 7th pin and power up the breadboard.

That’s all for now, hope you learned how we can make Blinking LED using Astable mode of 555 timer IC.