An impressive little machine gun sound effect generator circuit is discussed here. Once built can be integrated with any audio amplifier to experience a roaring bullet studded war like simulation.
A small hobby project which can be tried by all electronic enthusiasts will generate interesting machine gun sound effect over the connected loudspeaker, quite imitating the sound effects of the many action packed computer war games.
We all have played TV/computer games at some period of our life and know how exciting it feels to hear the different audio effects accompanied with such games especially the ones which involve heavy arms and actions.
Boys truly love playing action games like delta force, hitman and appreciate not only the visuals but also the produced machine gun sound effect.
Although our world has gone hi-tech and it requires just a single small chip to generate many intriguing audio sounds but building one such circuit using discrete components can be quite amusing too.
Especially the electronic enthusiasts will love making an electronic machine gun sound generator using few CMOS ICs and some other passive components.
Here we discuss one simple machine gun sound effect generator circuit using three 74LS04 and just a handful of resistors. The IC 74LS04 is basically a hex NOT gate IC.
It consists of six NOT gates or inverters in one package. Each gate has two terminals one input and one output.
As the name suggests the logic generated at the output of the gates will be exactly the opposite of the received input level.
Let’s try to understand how the ICs are configured as an outstanding AK one-forty-seven like sound effect generator:
As can be seen in the enclosed circuit schematic, the unit basically consists of three almost identical IC configurations.
The pulses produced at the output of each section have their own distinct push pull ratios. These are integrated together and superimposed simulating exact machine gun shots.
Looking carefully, the circuit reveals that the six inverters from each of the IC are wired up as three astable multivibrators connected in series to each other.
The outcome quite replicates sound coming from three discrete firing posts, situated at some distance away.
The series connections of each astable are done through diodes, forcing the later to oscillate only when the previous AMV is not operating or at zero logic.
We see that two sections of the circuit include a potentiometer while the last one is without any controls. The potentiometers are used to control the frequencies of the relevant AMVs which determine the rate of gun fire sounds.
The involvement of 74LS series ensures minimum current consumption which is not more than 2 mA typically @ 5 volts.
However the generated pulses lack volume and therefore is unable to drive loudspeakers directly. The terminated output may be suitably integrated to an audio amplifier to get the actual FEEL of the booming gun fire simulations. The pots may be adjusted externally to reproduce and optimize the best possible machine gun sound effect.
The entire machine gun sound effect circuit can be assembled over a piece of general PCB and fitted inside the audio amplifier cabinet. The circuit may be powered from the amplifiers power supply itself.