Machine Gun Sound Circuit is a simple electronic circuit that will make a sound like a Machine Gun using IC 555 as a timer. Here I am going to explain how to make the circuit and also how the circuit works. First of all, before we get to know the circuit, we have to know the most important component fro the circuit itself. Yes, the IC Timer 555. IC 555 is one of the most popular and widely use ICs of all time. The 555 timer designed by Hans Camenzind in 1971 can be found in many electronic devices from the simple on to the complex one. It is a highly stable integrated circuit that can produce accurate time delays and oscillations. This is the picture of IC 555. IC 555 has 8 pins and each of them has its functionality.