Ever consider playing a lovely doorbell song or the pleasant sound of birds singing from within the car?
Thanks to the miracles of current technology anyone can achieve this desire.
What is a Chirping Bird Sound Generator Circuit:
This versatile Chirping Bird Sound Generator Circuit enables anybody to take pleasure in the beautiful sounds of chirping birds at any time and from any location.
This clever circuit is often used to make plastic bird decorations brighter or to add flair to doorbells.
This circuits two astable multivibrators work together to create a warbling sound that mimics the peaceful chirping sound of a real birds.
If anyone wants to have sounds that are inspired by nature in their daily life than read on to learn more about the Chirping Bird Sound Generator Circuit and how it works.
Circuit Working:
Parts List:
| Component | Quantity |
|---|---|
| Resistors (all are 1/4 watt) | |
| 1.5k | 4 |
| 2.2k | 3 |
| 68k | 2 |
| 10Ω | 1 |
| 1k | 1 |
| Potentiometer 10k | 1 |
| Capacitors | |
| Electrolytic 10µF 25V | 3 |
| Electrolytic 2000µF 25V | 1 |
| Ceramic 47nF | 2 |
| Semiconductors | |
| Transistors | |
| BC557 | 4 |
| 2N2907 | 1 |
| Any standard audio output transformer | 1 |
| 8Ω speaker | 1 |
Two astable multivibrators one for measuring tone and the other to calculate the repeating tone form the basis of the Chirping Bird Sound Generator Circuit.
The initial tone of the birds chirping is set by the tone oscillator.
In every half cycle the oscillators tone changes and its fundamental tone gets changed by adjusting the VR1 resistors variable arms position.
Tone Oscillator Equation:
Tone (f) = 0.693 / (R1 + 2 * (R2 + VR1)) * C1
where:
- The tone frequency is represented by f.
- The starting point of the resistors resistance is indicated by R1.
- The second resistors resistance is shown by R2.
- The variable resistor is VR1.
- The capacitance is C1.
A 10k variable resistor and 2.2k resistors in the base circuit are used to modify the tone across a wide range.
By modifying the tone oscillators collector base of coupling capacitors the tone can be changed.
The constant rate oscillator controls the frequency at which the chirping sound is generated.
This rate gets changed by adjusting the collector base coupling capacitors.
Repetition Rate Equation:
Repetition Rate (R) = 0.693 / (R3 + R4) * C2
where:
R3is the resistance of the third resistorR4is the resistance of the fourth resistorC2is the capacitance
Smooth performing is ensured by a 10uF capacitor that connects from the potentiometers variable point to ground.
This capacitor shapes the square wave generated by the tone oscillator.
An extra capacitor is added to provide that unique warbling sound of birds chirping.
This capacitor smoothes the square wave and the circuits output and the capacitors value affect how long the sound lasts.
The tone is also affected by the supply voltage however this can be adjusted by changing the variable resistor.
Despite a wide range of supply voltages the circuit continues to function smoothly.
A capacitor is placed across the transformers primary winding to remove unwanted harmonics.
This Chirping Bird Sound Generator Circuit gives better control over the desired sound output than the more complex blocking oscillator circuits.
Advantages and Disadvantages
Advantages:
- Among the many uses for the circuit are novelty plastic birds, automobile horns and doorbells.
- A variety of chirping bird sounds are produced by adjusting the tone and continue rate.
- The circuit is easy to use and can function smoothly over a wide range of supply voltages.
Disadvantages:
- The circuit may not accurately capture all the details of real bird sounds even if it mimics bird chirping.
- Because the circuits tone is sensitive to supply voltage it might need to be adjusted on a regular basis.
Conclusion:
Everyone will love using the Chirping Bird Sound Generator Circuit in their electrical projects.
Whether it is a catchy doorbell tune, a unique automobile horn or the ability to make plastic birds come to life with lifelike chirping noises it allows users to bring a little bit of nature into daily life.
Do not be afraid to start this creative project and take pleasure in the constant sounds of chirping birds.
The comment space is there to help with any queries or suggestions anyone may have during their chirping bird journey.