The 555 is the well known IC in the world. It is one of the most DIY project IC. I created lot of circuits by using 555. Basically it is a cmos timer IC. It contain lot of transistors and resistors. So I am interested in the internal schematics of 555. So I try to made a working discrete 555 using discrete components. Here I made a 555 in a common PCB and then I made a mega 555 cover for the circuit. In that way I create a working MEGA 555. It is an exact large replica of 555 IC. It works same as the 555 IC. It is awesome. What you think?

For more details about circuit diagram and details , Please visit my BLOG, link given below,
https://0creativeengineering0.blogspot.com/2018/12/discrete-555.html

For the making procedure visit my instructable page,