This circuit produce a very sweet tone when it connected with power.
Basically this circuit contains two sections 1. Sound wave producer and 2. Amplifier
Hear sound wave has been produce with UM66/BT66 IC. In which pin no 2 is connected with 5Volt supply. Pin no 3 is used for ground purpose. And the output is collected from pin no 1 of the UM66.
Output of the IC UM66 is connected with base of transistor BC547B. A loud speaker is connected between collector of the transistor and positive terminal of battery.
Pin configuration of IC UM66 and transistor BC548b displayed in the circuit.
UM66
The IC UM66 is a popular melody generator IC (integrated circuit) that is widely used in small electronic projects and toys. It can generate various types of simple melodies and tunes when an external circuit is connected to it. The IC UM66 is a low-cost, low-power device that is easy to use, making it a popular choice for hobbyists and students learning electronics.
The IC UM66 can generate music in two ways: through an internal oscillator or by an external oscillator circuit. The internal oscillator uses a built-in RC network to generate the clock signals needed to produce the melody, while the external oscillator circuit provides an input signal to the IC to generate music.
The IC UM66 has a built-in ROM (read-only memory) that contains the data for various melodies. When an external circuit is connected to the IC, it selects the melody to be played and generates the corresponding output signals.
One important thing to note is that the IC UM66 can only generate simple melodies and tunes, and it has limited capabilities compared to other more advanced music synthesizers.
Regenerate response
BC 584B
The BC548B is a popular NPN bipolar junction transistor (BJT) commonly used in electronic circuits. It is designed for general-purpose amplification and switching applications, making it suitable for a wide range of electronic projects.
The BC548B transistor has a maximum collector current (Ic) rating of 100mA and a maximum collector-emitter voltage (Vce) rating of 30V. It also has a maximum power dissipation (Pd) rating of 500mW, which means it can handle a significant amount of power without getting damaged.
The BC548B transistor has three leads: the emitter, base, and collector. The emitter is connected to the negative (ground) terminal of the circuit, the collector is connected to the positive supply voltage, and the base is the control input. By applying a small current to the base, the transistor can be used to switch or amplify larger currents and voltages in the circuit.
The BC548B transistor is often used in audio amplifier circuits, switching circuits, and oscillator circuits, among others. It is a widely available and affordable transistor, making it a popular choice for hobbyists and students learning electronics.