NE555 Timer IC

The NE555 is a popular precision timer IC used to generate accurate time delays and oscillations. It's inexpensive, reliable and easy to use, which is why it has been a favorite of students, hobbyists and engineers for decades. It comes in an 8-pin DIP package that fits directly into a breadboard or can be soldered onto a PCB. Operating modes Monostable (one-shot): produces a single output pulse of a set length when triggered. It's used for timers, delays and touch switches. Astable (oscillator): produces a continuous square wave. It's used for LED flashers, buzzers/alarms, clock pulses and PWM. Bistable (flip-flop): works as a simple latch or toggle switch. Key specifications Supply voltage: 4.5 V to 16 V Output current: up to about 200 mA (source or sink) Timing range: from microseconds to hours, set by an external resistor and capacitor Package: 8-pin DIP Operating temperature: 0°C to 70°C Common applications LED blinkers and flashing lights Time-delay circuits and timers Alarm and siren circuits Pulse generators and PWM motor or dimmer control School and college electronics projects, Arduino-based experiments