555 IC

The 555 IC is a highly popular and versatile timer integrated circuit used to generate accurate time delays, pulses, and oscillations. It is widely used in electronic projects because of its simplicity, reliability, and low cost. The IC can operate in three main modes: Monostable, Astable, and Bistable.

Key Features

• Operates from 4.5V to 15V DC

• High current output up to 200 mA

• Can work as timer, pulse generator, or oscillator

• Stable and accurate timing

• Low power consumption

• Available in 8-pin DIP package

Pin Configuration (8-Pin)

1. GND – Ground

2. TRIG – Trigger input

3. OUT – Output

4. RESET – Reset (active low)

5. CTRL – Control voltage

6. THRESH – Threshold

7. DISCH – Discharge

8. VCC – Supply voltage

Operating Modes

• Monostable Mode – Generates a single output pulse

• Astable Mode – Generates continuous square waves

• Bistable Mode – Acts as a flip-flop

Applications

• LED flashers and blinkers

• Time delay circuits

• Pulse and square wave generators

• Alarm and tone generators

• PWM control circuits

• Toys, timers, and DIY electronics projects

Advantages

• Easy to use and interface

• Works with both analog and digital circuits

• High reliability and long life

• Suitable for beginners and professionals

Package Contents
1 × 555 IC