The above code is the infinite loop where the voice recorder records the voices. Wait_min(2) // This is the length of the audio file which is set to 2 minutes pass higher value into the wait_min(int mins) function. if you need more time duration recording audio then means, in this loop process record 2mins of audio. Serial.println("#") Īudio.startRecording(file_name, sample_rate, mic_pin)
Textnow record audio spy serial#
This section also gives you an error on the serial monitor if anything is wrong. In the above codes, pin directions are set and the SD card is mounted. Serial.println("An Error has occurred while mounting SD") initializes the serial connection between the Arduino and any connected serial device(e.g. put your setup code here, to run once: The above code is used for printing the serial codes. #define SD_CSPin 10 // defines the CS pin of the SD card. The mic pin is available in the A0 pin with a sample rate of 16000 bits. In the above lines “recording is going on" notification LED is selected which is the available LED in the Arduino. In the above codes file, name prefix and conversion file type are set along with the starting file number where the audio will be stored.
Textnow record audio spy download#
You can download the TMRpcm library from GitHub. To compile the code, kindly use this library. In the above lines, SPI, SD, and TMR based PCM libraries are included. The audio stores in 2 minutes format and then starts to store in a new file. These SPI pins are connected with the following pins.įor the MAX9814, Analog pins are used that are listed in the table given below. By default, the module provides an uncompressed gain set to 60dB.įor the micro SD card, SPI (Serial Parallel Interface) is used. There is also a gain pin that can be connected to the GND or VDD for a controlled gain of 50dB and 40dB. There are many pins available in the MAX9814 module, but, majorly the VCC, GND, and out pins are used. wav format and stores it inside a MicroSD card module that is also connected with the Arduino.
Then, the Arduino converts the sound into. MAX9814 (shown in the image above) records the sound and transmits it to the Arduino. This device features a low-noise front-end amplifier, a variable gain amplifier (VGA), an output amplifier, a microphone bias voltage generator, and an AGC control circuit all inside a single chip. The main component of this project is the MAX9814 which is a low-cost, high-performance microphone amplifier with automatic gain control (AGC) and low noise microphone bias. The brain of the project is the Arduino Nano that you can see in the schematic. The complete Schematic diagram for the Arduino Based Spy Bug is shown below. 5V power supply unit (Can be a power bank or so)Īrduino Based Spy Bug – Schematic Diagram.
The circuit for the spy recorder consists of very basic components that you will be able to find in your local hobby store, when you have accrued all the components, it can be easily built at home without any complexity. List of Components - Arduino Based Spy Bug Respect other people’s privacy, any misuse of this device might be a punishable offense according to your state law. Important: The project discussed here is only intended for educational use. All this sounds interesting, right? So, let's get started. We also attached an LED with the Arduino that indicates the recording process has started. Once powered up, the recording process will continue until the battery is dead or there is no more space to store the recorded audio. It will able to record audio clips that are 2 minutes long, each 2 minutes long clip would be numbered serially. This project focuses on building an Arduino Based Voice Recorder, which can also be abused as a spy bug. Our spy bug uses a small microphone to record the voice and it stores the recorded voice onto an SD card. Planning to buy a small voice recorder to record voices or sounds in an environment and store them in its memory? Think again! You can easily build your own voice recorder by following a few simple steps.