In this tutorial, we will show you how to make a circuit that produces a “tick tick” sound when powered up. This sound is similar to that of a time bomb that is about to explode. To make this circuit we will use some of the basic electronic components such as a 555 timer IC and a speaker. The electrical signals produced by the 555 timers will be converted into sound by the speaker.
Hardware Components
The following components are required to make Ticking Sound Circuit
| S. NO | Component | Value | Qty |
|---|---|---|---|
| 1. | Breadboard | – | 1 |
| 2. | Battery | 9v | 1 |
| 3. | Connecting Wires | – | 1 |
| 4. | IC | NE555 Timer | 1 |
| 5. | Speaker | 8 ohm | 1 |
| 6. | Capacitor | 10uF | 2 |
| 7. | Resistor | 47K ohm | 1 |
555 IC Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of 555 Timer
Ticking Sound Circuit
Connections
- Place the 555 Timer IC on the breadboard and connect Pin 8 to VCC and Pin 1 to GND.
- Connect Pin 4 to VCC.
- Use a jumper wire to connect Pin 2 and Pin 6 together.
- Add a 10uF Capacitor between Pin 2 and GND.
- Use a 47K Resistor to connect Pin 3 and Pin 6 together.
- Use a 10uF Capacitor to connect Pin 3 to the Speaker and connect the other terminal of the speaker to GND
Working Explanation
The 555 timer IC will work as an astable multivibrator and produce a square wave at the output. The frequency of the ticking sound made by the speaker depends upon the charging and discharging rate of capacitor C1. When the output at pin 3 is high, the capacitor will get charged and when the output at pin 3 is low, the capacitor will get discharged through the speaker.
Application
- We can produce the sound of a clock and time bomb with this circuit.
