During my training period a client requested a product that does the following:

A house bell with four buttons on the external panel

The first button makes a low bell sound

The second button makes a medium bell sound

The third button makes a high bell sound

The fourth button makes a light that flashes 5 times and then lights up for 5 minutes

The product could have been implemented with programmable controllers but after calculating the cost it was cheaper to make hardware

I designed a PCB for the internal and external panels and combined them together to reduce the cost of manufacturing and importing.

Using hc555 and NE555 I made a circuit that lights up my name.

speed sensor that measures the speed of objects and displays it on a 7 segment display I used firmware circuit & hardware circuit component.