Nowadays, Arduino projects are very popular and they controls everything, as they are easy to build and they are useful for learning electronics. This project demonstrates a Bluetooth-Controlled Police Siren Sound Circuit with Arduino, then the Arduino UNO acts as the main controller, while the Bluetooth module provides wireless control. Furthermore, with Bluetooth we can […]
Audio Circuits
9V Loud Speaker Sound Generator Circuit
This article explains a 9V Loud Speaker Sound Generator Circuit that is simple, low-cost, and operates from a 9V DC power supply. In addition, the circuit gives loud sound compared to simple buzzer, therefore it is useful for alarms, door bells, alerts and projects and also, the circuit uses common transistors, so beginners can build […]
Simple Transistor Oscillator Speaker Circuit
Many people think a buzzer is necessary to produce sound, but this circuit proves otherwise by generating sound with only a few components. This Simple Transistor Oscillator Speaker Circuit does not use a buzzer, instead, the transistors drive a small speaker directly, allowing the circuit to generate sound on its own. Moreover, it is very […]
Toy Organ Circuit using Transistors
This Toy Organ Circuit using Transistors show how electronic circuits can produce music with only a few components; also the circuit uses just two transistors and a few simple parts, so it requires no IC, no coding, and no complex components. When we press different push buttons, the circuit produces different sound tones, so it […]
Mini Condenser Microphone Amplifier Circuit
This mini condenser microphone amplifier circuit is a low cost project that strengthens the weak signal from a condenser microphone to produce a clear output; further it improves the microphones voice signal and provides good audio gain. The circuit works with a small 9V battery and does not require an IC, so anyone can build […]
Op Amp 741 Sound Generator Circuit
Here is the tutorial for small circuit with big sound; this Op Amp 741 Sound Generator Circuit creates stable tone for hobby projects. The Op amp works like mini sound machine with no complex parts and with no hard wiring, just connect parts and enjoy instant sound in just few minutes. Also, this circuit is […]