Welcome, 555 Timer is a versatile timer IC which can perform different operations and has thousands of applications in industry. Today we are going to learn that how can we use 555 timer as PWM generator. Pulse Width Modulation often refered to as PWM, is as the name suggests, is a type of modulation in which we vary the width of digital signal, be it voltage or current, while frequency of output signal remains constant. When the pulse is varied with the passage of time average output voltage change occurs. You can learn more about PWM in power electronics section where PWM finds numbers of applications.
Here in this circuit 555 timer is configured as Astable multi-vibrator with controlled signal, so when the control signal is changed output pulse is changed with constant frequency.
Required Parts:
- 555 Timer IC
- Resistors 1k x 2
- Resistor 10k
- Resistor 540 Ohm
- LED
- Potentiometer 10k
- Capacitor 4.7uf
- Breadboard
- 9 Volt Battery
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Breadboard Assembly:
Schematic Diagram:
Questions and suggestions are welcomed in comments sections.
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