Musical Tone with Push Button(STEAM Education)

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The aim of this project is to understand the functioning of a musical alarm circuit using basic electronic components.

Project : 39

Musical Tone with Push Button

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Project Aim:

The aim of this project is to understand the functioning of a musical alarm circuit using basic electronic components.

Components Used:

1. Power Supply

2. UM66T (CMOS, Melody Tone Generator)

3. Transistor NPN

4. Buzzer

5. Push Button

6. Resistor 4.7K

7. Capacitor 100uF

8. Connecting Wires

Circuit Diagram:

Connection Procedure:

Step 1: Connect the positive terminal of the power supply (Pin 62) to one terminal of the push button (Pin 57).

Step 2: Connect the other terminal of the push button (Pin 58) to the positive terminal of the 100uF capacitor (Pin 25) and to the VDD of the UM66T (Pin 39).

Step 3: Connect the negative terminal of the power supply (Pin 59) to the VSS of the UM66T (Pin 38).

Step 4: Connect the positive terminal of the power supply (Pin 63) to the positive terminal of the buzzer (Pin 54).

Step 5: Connect the negative terminal of the buzzer (Pin 53) to the collector of the NPN transistor (Pin 34).

Step 6: Connect the negative terminal of the power supply (Pin 60) to the emitter of the NPN transistor (Pin 32).

Step 7: Connect the base of the NPN transistor (Pin 33) to one end of the 4.7K resistor (Pin 10).

Step 8: Connect the other end of the 4.7K resistor (Pin 9) to the output of the UM66T (Pin 40).

To test the project, press the Pushbutton a melody tone will generate by the buzzer.

Explanation:

In this project, we explore how a tactile switch, transistor, CMOS, and buzzer are interconnected to create a musical alarm system. When the tactile switch is pressed, it sends power to the base of the transistor, causing it to activate. The activated transistor then triggers the CMOS, which in turn activates a second transistor. This second transistor functions as a closed switch, allowing power to flow to the buzzer, thereby producing a musical alarm sound as the output.