Arduino Spy Bug
A simple voice recorder for Arduino using an SD card and an electret microphone amplifier circuit.
Independent of any third-party libraries.
Wiring (also documented in spybug/spybug.ino)
SD Card Wiring
|5V or 3V3
WARNING: SD cards are not designed for 5V; I have been using 5V anyways and everything seems fine, but beware that there is a significant risk of immediate or premature failure when not using a buffer circuit.
SD pin D3 is the chip select pin. It can be set manually in
Microphone Wiring (MAX9814 w/ electret microphone)
Out defaults to A0 (AdcChannel0), but can be set manually in
Power Consumption (Arduino Nano)
|No voltage regulator
|No TTL module or voltage regulator