1 x Recorder Data Logger Module Logging Shield XD-05 For Arduino UNO SD Card + CR1220 Battery. SD card interface works with FAT16 or FAT32 formatted cards. The battery backup lasts for years.
Digital to Analog Converter (DAC) is a device that transforms digital data into an analog signal. According to the Nyquist-Shannon sampling theorem, any sampled data can be reconstructed perfectly with bandwidth and Nyquist criteria. A DAC can reconstruct sampled data into an analog signal with precision.