Grasshopper Sound Generator Circuit using 555 Timer IC

Electronics projects just because of the name must not, always be complicated and advance level projects. Small projects play a vital role in the field of electronics. Here is a similar basic project which is named, ‘Grasshopper Sound Generator Circuit Using 555’. The project will surely entertain children and for electronics beginners, this project is the best option to start with. Especially at night times, we do often hear the shrill sound of grasshopper or cockroach. This project also produces a similar sound (PI-PI sound like grasshopper) and for this reason, is named so.

Circuit Description of Grasshopper Sound Generator Circuit

A pair of timer IC (NE555) acts as the building block of this circuit which is accompanied by a few passive components (i.e. resistor and capacitor). In this particular project, both the timer IC (IC1 and IC2) are used here as astable multivibrators. The frequency of IC1 is used to modulate the frequency of IC2. Thus modulated frequency is further supplied to the speaker from pin 3 of IC2 through capacitor C4.

grasshopper sound generator circuit using 555 timer ic

The frequency of IC1 used for modulation is obtained as the sawtooth voltage at pin 6. It is then given to control pin 5 of IC2 to control the frequency of IC2 as stated above. Here, IC1 serves as a low-frequency oscillator whereas IC2 acts as a high-frequency oscillator. The sawtooth voltage at control pin 5 of IC2 is used to drive output audio frequency (3 – 30 KHz) high and low. Because of this, we hear something like the shrill sound of insects (pi-pi sound of grasshopper).

Check out other different sound generators posted on bestengineeringprojects.com

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  4. Rain Sound Generator
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PARTS LIST OF GRASSHOPPER SOUND GENERATOR CIRCUIT USING 555 TIMER IC

Resistor (all ¼-watt, ± 5% Carbon)
R1 = 3.3 KΩ

R2, R4, R5 = 10 KΩ

R3 = 8.2 KΩ

Capacitors
C1 = 0.01 µF, 50V (Ceramic Disc)

C2 = 4.7 µF, 10V (Electrolytic Capacitor)

C3 = 0.033 µF, 50V (Ceramic Disc)

C4 = 220 µF, 25V (Electrolytic Capacitor)

Semiconductors
IC1, IC2 = NE555 (Timer IC)
Miscellaneous
L.S. = 8 Ω speaker

 

7 Thoughts to “Grasshopper Sound Generator Circuit using 555 Timer IC”

  1. Car Car Jinx

    would it be possible to modify this to run it on 9 volts?

    1. No modification is required you can directly connect 9V power supply instead of 6V.

  2. Rodolphe Fiquet

    Hi. I would use your sound generator on 1,5 V is it possible ?

    1. Hi, Rodolphe Figuet, A timer IC 555 is used here and its working voltage is between 4.5V to 15V. So 1.5V cannot be used.

  3. Rodolphe Fiquet

    Thanx for your reply,

    Is another way possible ? Another timer ?

    1. At least you have to use 4.5V in order to use this circuit.

  4. Rodolphe Fiquet

    Yes I understood what you meant.

    My question was “Is it possible to use another type of timer ?”
    Another reference to work properly with a AAA 1,5 battery ?

    Sorry for my bad english :)

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