Machine Gun Sound on Power Breadboard PBB-272B

A tutorial on how to make a Machine Gun Sound generator circuit using 555 timer IC on our famous Power Breadboard PBB-272B. In addition, this circuit simulates sound similar to the audio emitted from the continuous triggering of a machine gun. Furthermore, the output can be further amplified and used with high-power speakers.

Table Of Content

1. Part List
2. Circuit Diagram
3. How does the circuit work?
4. Conclusion

Part List

• 555 Timer IC
• PNP Transistor2N4403
• 8 Ohm Speaker
• Capacitors: 10nF, 3x 10uF
• Resistors: 33K, 100K
• Power Breadboard PBB-272B
• Jumper Wires
• Momentary Push Button Switch (Optional)

Circuit Diagram

How does the circuit work?

Firstly, the 100K Ohm resistor controls the time gap between each firing sound emitted from the speaker. Therefore, increasing its value will slow down the sound and vice versa. You can also experiment with using a slightly different capacitor in place of a 10uF capacitor connected between a 100K resistor and speaker.

Conclusion

Although the sounds produced from this circuit are very identical to the audio emitted from real-world machine guns, the timing between each firing is constant.

In order to make it feel more intuitive, we can have a variable timing gap between each firing and change it depending on the amount of pressure applied to the switch/button. And one way to achieve this is by replacing the 100K resistor with a variable sliding potentiometer. In our case, the Power Breadboard PBB-272B really helps.