A portable spectrometer imager based on the C12880MA sensor, using Teensy 4.0 with high-speed DMA ADC sampling and a TFT display for real-time waveform visualization.
This project presents a compact and portable spectrometer imager based on the Hamamatsu C12880MA micro-spectrometer.
The system includes an analog buffer and low-pass filter, a high-speed ADC implemented on the Teensy 4.0 microcontroller,
and a TFT ILI9488 display for real-time visualization of the sampled spectral waveform.
To achieve a stable sampling rate of approximately 200 kHz, the design utilizes DMA-based continuous ADC acquisition
synchronized with the spectrometer’s EOS (End-Of-Scan) signal. This approach eliminates CPU overhead, reduces sampling jitter,
and ensures reliable waveform capture across a wide range of input frequencies.
The hardware platform integrates a custom PCB that includes a DCDC converter, battery charger, and Teensy module,
enabling fully portable and low-power operation. The system successfully demonstrates real-time capturing, processing,
and displaying of analog spectral data, serving as a practical implementation of embedded high-speed data acquisition.
