Sequential LED Blinking using 555 Timer Circuit in Proteus ISIS

Today I am going to share my new tutorial which is Sequential LED Blinking Using 555 Timer in Proteus ISIS. If you recall our one of previous tutorials, which was ‘Multiple LED Flashing Project Using 555 Timer in Proteus ISIS’, but in today’s tutorial we are going to take the same concept to a next level and we are going to make the LEDs blink in either ascending or descending order.

It is a very simple tutorial like the previous one, but the only change is, in this project we have added a Shift Register (4017) next to 555 Timer. 4017 is a Serial IN Parallel OUT Shift Register, which means, at input port it takes data in Serial manner and at output port it will give data in Parallel manner. All types of register needs a clock pulse to operate and this clock is provided by Timers or Micro controllers. In this project we will be using 555 Timer to generate clock pulse. 555 Times gives clock pulse at pin # 3 abbreviated as ‘Q’ pin. And this clock pulse is given at pin # 14 of Shift Register abbreviated as ‘CLK’ pin. Shift Register (4017) has total 15 pins. 2 input pins, 10 output pins. Input data is given at pin # 13, which is called ‘Enable’ pin and register shifts the data sequentially at its output pins. Shift register has 10 output pins which means it is a 10-bit shift register, which means it executes 10-bit data simultaneously. Now dear friends, let’s move towards the hardware of the project but as you know, practice makes a man perfect. Try to do it with your own hand so that, you get to know the practical applications of electrical components in person.