555 timer adjustable

555 timer adjustableWe can vary timing cycle (duty cycle) of 555 timer by using variable resister instead of a fixed resister. It uses a readily available 555 timer integrated circuit (IC) to create a pulsating signal. By adjusting values of resistors and capacitors, you can control the speed of the blinking LED. This circuit is a great introduction to electronics and learning about the 555 timer’s function as an astable multivibrator.