LEDs are commonly used in chipmall as they consume less power, are easy to use, and have a long lifespan. In this tutorial, we will learn how to build an LED ON and OFF circuit using 555 timer IC and BC557.

Required Components

Before we get started, let's understand the components we will be using in this circuit.

555 timer IC

BC557 Transistor

Resistors -1k*6,56k,47k,200k,100k

Capacitors-16V 470uf, 16V 10uF

LEDs

Power source 12V

555 Timer IC Pinout

555 Timer Pinout https://www.chipmall.com/news/how-to-build-led-dimmer-circuit-using-555-timer-ic-and-bc557-transistor_431