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Simple Bird Sound generator Circuit

Last Updated on June 16, 2021 by Swagatam 19 Comments

caution electricity can be dangerous

The diagram presented below shows a simple circuit of a bird sound generator. All the parts are very common and the transformer is an ordinary type as found in small transistor radios at the output stage

Circuit Operation

The circuit is basically a feedback oscillator circuit that is configured around a small output transformer. The transistor forms the main active components here.

When mains power os applied to the circuit, the 4K7 resistor resists the voltage and drops it to lower levels suitable for operating the DC electronic circuit.

The diode rectified the low level AC to DC while the capacitor filters and smoothens the rectified DC.

Initially the voltage reaches the base of the transistor which instantly conducts and pulls the one half winding of the transformer to ground, forcing a strong induced current across the secondary winding.

However the moment this happens, the entire voltage is shorted to ground via the transformer winding and this eliminates any biasing voltage at the the base of the transistor and it fails to support the conduction.

The transistor releases the transformer activation which reverts a strong back emf to the secondary winding.
However the moment the transistor stops conducting, the voltage at it's base is restored and the cycle repeats again.

This repeated pulsation of the transformer induces a strong back emf oscillation at the secondary of the transformer, which is amplified over the connected loudspeaker.

The associated components, the 10 resistor and the 0.1 capacitor performs the feedback function for keeping the transistor active with a certain foxed frequency range.

The frequency of the circuit may be adjusted through the 4k7 pot and the 0.1uF capacitor so that any desired tone can be achieved at the output over the speaker.

The above adjustments helps to refine the tone of a particular bird to any form and helps to replicate the results as closely as possible.

bird chirping sound simulator circuit

220 V Bird sound Chirping Effect

The 220 V AC based "chirper" circuit sounds exactly like a bird. It offers a control which you can use to vary the tone of the fundamental sound output through lower frequencies to higher. When the speaker (4 to 6 inch should be adequate) is installed within the exact same box along with the circuitry, it can decide the complete scale the device.

Essentially the circuit is actually a free-running multivibrator. Pot R4 adjusts the frequency from around 1000 hertz to 10,000 hertz. The bird chirping effect is achieved by a low-frequency oscillator applying a neon bulb (M3).

This signal supplies base bias for transistor Q1. In case capacitor C1 is short circuited, the chirping effect is removed, and the circuit turns into a easy variable-frequency multivibrator. Transistor Q3 works like the driver stage, and Q4 is rigged as the output transistor.

Parts List

T1 can be any standard audio output transformer as shown below:

Another Simple Bird Sound Generator

Wide Range Bird Sound Simulator

The bird simulator circuit explained circuit is build with three relaxation oscillators and one decade counter. The oscillators are all configured like astable multivibrators.

The AMV1 to 3, are both configured around a a couple of CMOS logic inverters. Oscillator AMV1 functions with a frequency which may be a small percentage of a hertz. This frequency is employed for providing the clock pulses to the counter IC2.

For so long as the counter remains activated, a logic 1 moves across the outputs Q0 to Q9 exactly in accordance with the rhythm with the clock pulses.

The AMV2 oscillator can be expected to imitate the vocal chord of a bird, since it generates an high-frequency note resembling a bird sound. The AMV3 oscillator becomes responsible for delivering a wide range of frequencies that modulates the AMV2 output.

This is implemented in such a way that the ultimate output simulates exactly a real bird sound, not like the one that you hear from electronic chimes.

The frequency created from the AMV3 oscillator is determined by the value of resistance connected between the capacitor C4 and resistor R4. To be more precise, it is resistor which is switched between R8 and R11.

The switching of these resistors is implemented by CMOS switches ES1 ES4, governed by the many different combinations from the counter outputs.

This particular set up guarantees that the ultimate output is randomly created, and sounds like a real bird and not a monotonously reproducing noise. The circuit includes a wide variety of rich bird sound customization options.

Remember that it is always possible to alter the resistors R8----R11 values, along with the counter circuit output combinations, with the connections to electronic switches ES1 ES4, in order to customize the bird sound to any desired effect.

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About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Reader Interactions

Comments

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  1. Perin Jean says

    August 11, 2022

    Hello, I am interested in the circuit “Wide range bird sound simulator” is this assembly to scare birds away in my cherry tree.
    Sincerely Perin.

    Reply
    • Swagatam says

      August 11, 2022

      Sure, you can build it, please go ahead.

      Reply
  2. Norman D Kelley says

    August 12, 2021

    Hi Swagatam,
    It appears you received my email as you posted the cricket chirp schematic. Have you had time to review it to see if it can be modified to do its cricket sound once or twice and then be silent for 5 to 10 minutes and then repeat? I’m not pressuring you, I just want to know if you are considering it. Thanks!

    Reply
    • Swagatam says

      August 12, 2021

      Hi Norman, I have already answered you in the following link with a solution. please check it.

      https://www.homemade-circuits.com/cube-light-circuits/

      Reply
  3. Swagatam says

    August 8, 2021

    Hi Norman, my email is in live.in not in wordpress, please search your previous email which you had sent me….or you can upload the schematic to any free online image hosting site, and provide the link to me here…

    Reply
  4. Norman D Kelley says

    August 5, 2021

    Hi Swagatam,

    I found this circuit on the internet and it works. I would like to modify it to chirp once and then be silent for 5-10 minutes and then repeat. I tried several things without success. Please help! IC1 is 4093 and IC2 is 4060.

    cricket chirping sound simulator circuit

    R1=330K, R2=220K, R3,R6=100K, R4=OPTIONAL LDR, R5,R7=22K, R8=10K, R9=470R TRIM POT, R10=22R

    C1,C2,C3=47uF, C4=10uF, C5=1uF, C6=10NF, D1,D2,D3,D4=1N4148, Q1=BC547, IC1=4093, IC2=4060

    Reply
  5. Emaad says

    July 28, 2021

    Dear Swagatam
    Hello. Thank you for reply Sir.
    Emaad

    Reply
    • Swagatam says

      July 28, 2021

      You are welcome Emaad!

      Reply
  6. Emaad Mehraabi says

    July 27, 2021

    Dear Swagatam
    Hello. Please tell me if the amounts of 2 NON POLAR?? C1 and C2 are 0.02 and 0.05? ( in your first diagram: Another Simple Bird Sound Generator )
    Thanks in advance
    Emaad

    Reply
    • Swagatam says

      July 28, 2021

      Hello Emaad, C1 = 0.02uF, C2 = 0.05uF ceramic disc capacitors

      Reply
  7. Pradip Saha says

    January 11, 2021

    Give alternative diagram as radio transformar is not available in market.

    Reply
    • Swagatam says

      January 11, 2021

      Presently I don’t have it, will try to search and update it here

      Reply
  8. kaushik mondal says

    October 15, 2020

    Earlier two transformers (t1 & t2, used in Hitachi radio circuit) were used, but in this ckt only one transformer. Can I use pocket radio driver transformer (bell silicon circuit)?

    Reply
    • Swagatam says

      October 15, 2020

      Because this is not a radio but a simple oscillator amplifier, yes you can use the audio transformer from any pocket radio

      Reply
  9. Anil Kumar.K says

    November 29, 2019

    Dear Swagatham
    I have assembled this type of circuit before 20years. The bird chirping sound is very pleasing.
    Bot, now a days the output transformer is difficult to get in our local area. (I am sure, it is available in Online.)

    So, cian you please re design the circuit using a 3V-0-3V or 6V-0-6V/500mA secodary, 220V primary transformer instead of the audio output transformer.
    Thanks in advance.

    Reply
    • Swagatam says

      November 29, 2019

      Dear Anil, you can use a step down transformer without any changes to the circuit. We just have to make sure that the transformer primary specs and the circuit supply specs are matching, meaning if the circuit is designed work with 9V then use a 9-0-9 transformer and so on.

      In this design since a 4k7 resistor is used for dropping the current, any low voltage transformer should work…a 3-0-3 or a 6-0-6V all should work with minor difference in the output volume

      Reply
      • Anil Kumar.K says

        November 29, 2019

        Dear Swagatham,
        No, no…no. You may not understand my question well. I am just asking about the tranformer that connected the speaker in your circuit.

        Can a 3V-0-3V or 6V-0-6V/220V stepdown transformer use in place of the OUTPUT TRNSFORMER with minor or major modifications in the circuit….?

        Reply
        • Swagatam says

          November 29, 2019

          Dear Anil, yes you can do it without any changes to the circuit. The size and weight of the transformer will be the only issue here.

          Reply
        • Julian says

          December 21, 2019

          Hi! You could use the 9-0-9 for transistor side and the 115 or 230 side connected to the 115 or 230 side of a second transformer and the speaker in its 9-0-9 side.

          Reply

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