Introduction
Microphone always inspires and motivates public speaker, but microphone circuitry always fascinates electronic engineers. Today, we have seen how the world uses the mic and speakers t deliver speeches, leaders try to convince the general public through these microphones. Public events are not useful without them. Seminars, concerts, workshops, and every event needs a microphone and speakers. And, thanks to the circuit designer who made these amplifier circuits for this purpose. Although, we have already discussed different amplifier circuits in our previous articles. But, this time we have come up with another effective amplifier circuit. So, in this tutorial, we are going to make a “Simple Speech Amplifier Circuit”.
Hardware Required
| S.mo | Component | Value | Qty |
|---|---|---|---|
| 1. | IC | TDA7052A | 1 |
| 2. | Loudspeaker | 8Ω | 1 |
| 3. | Condenser Mic | – | 1 |
| 4. | Transistor NPN | BC547 | 1 |
| 5. | Potentiometer | 20KΩ | 1 |
| 6. | Capacitor | 1µF, 10µF, 0.1µF | 1,1,1 |
| 7. | Resistor | 100KΩ, 10KΩ, 330Ω, 1KΩ | 1,1,1, |
| 8. | 2-Pin Connector | – | 1 |
Circuit Diagram
Working Explanation
In this Simple Speech Amplifier Circuit, the microphone gets the 9V DC supply through the resistor R1 wired into the circuit. The output of this mic is given at the base of transistor Q1 with the help of a capacitor. The transistor gets triggered and provides the amplified output at the collector side. The collector is connected to pin 2, which is the input voltage pin of the power amplifier IC TDA7052A. This gives the amplified output at the output pins 5 and 6, and both together drive the speaker.
Application and Uses
- It can be used in different events and seminars to deliver speeches
