555 Timer LED Flasher - 555 timer applications




Applications of 555 Timer

Applications include :

  • Precision timing
  • Pulse generation
  • Sequential timing
  • Time delay generation and
  • Pulse width modulation (PWM).

Precision Timing

  • NA555, NE555, SA555, SE555 Precision Timers. These devices are precision timing circuits. Timing From Microseconds to Hours producing accurate time delays or oscillation.

Pulse generation

  • The pulse generation is made with the 555 timer IC. The circuit is an astable multivibrator with a 50% pulse duty cycle.
  • In astable mode, the output from the 555 timer is a continuous pulse waveform of a specific frequency that depends on the values of the two resistors (RA and RB) and capacitor (C) used in the circuit. 

Sequential timing

  • This type of sequential controller is required for injection moulding machine, back sealing experiments where it required to activate solenoids, relays other activating mechanism for a predefined time sequentially one by one. Sequential timer is used for control process. The timer IC 555 is operated in monostable mode.

Time delay generation

  • It also has a potentiometer to adjust the time delay, where can increase of decrease the time delay by just rotating the potentiometer.
  • Here we have used 9 V battery and 5V optional relay for switching the AC load. A 5v voltage regulator is used for giving 5v regular supply to the circuit. 

Pulse width modulation (PWM)

  • PWM (Pulse Width Modulation) is a important feature of today's every microcontroller due to its requirement for controlling many devices in every field of Electronics almost. 
  • PWM is widely used for motor controlling, lighting controlling etc.

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