The audio mixer circuit is simpler, use a small amount of components and I was able to lay the whole circuit down onto a single PCB (main board). The full audio mixer module calls for the ...

The MAX4466 microphone amplifier module is a very versatile and easy-to-use microphone amplifier module. As the name suggests it is based on the MAX4466 amplifier chip from Analog Devices. It offers a ...

The complete circuit diagram for the Arduino Audio Spy Bug transmitter is shown below. If you are completely new to arduino and nrf24l01, you may try this simple Arduino nRF24L01 interfacing tutorial ...