Small spy recorder

1. Overview

TODO

TODO: How long can it record?

It can be powered from the outside for longer recording durations.

It can be controlled via Bluetooth Low Energy from a smartphone or tablet.

I chose the Arduino Nano RP2040, because it includes a microphone and Bluetooth module for communication. Otherwise they would have to be on a separate module board. (TODO: is the Arduino 33 BLE an alternative?)

It gives immediate user feedback via a RGB LED.

2. External ressources

• Arduino's overview page for its Nano RP2040 Connect (specs, pinout, datasheet, etc.)

TODO

3. Requirements

3.1. Hardware

required parts:

• Arduino Nano RP2040 Connect (TODO: is the Arduino 33 BLE an alternative?)
• micro SD module
• 9V battery
• 9V battery cable
• case (TODO: which size?)
• button
• RGB LED (through-hole, not the RGB LED built-in to the Arduino Nano RP2040)
• USB C to USB B 2.0 micro adapter (optional)
• breadboard (TODO: which size?)
• pin headers
• wire
• super glue

required tools:

• soldering equipment
• USB cable to program the Arduino
• drill for making holes into the case

helpful tools:

• multimeter

3.2. Software

• Arduino IDE (TODO: VS Code alternative?)
• the code from this repository

4. Assembly

TODO

5. Testing

TODO

6. Conclusion

TODO

7. Sources

TODO