As part of diploma thesis, we developed a portable spectrometer based on the Hamamatsu C12666MA sensor and enabling the detection of the light spectrum in the range between 340nm and 780nm. The problem we addressed is the need for a compact device that can be clipped onto clothing and used to analyze the light to which the user is exposed during the day. Such a solution is particularly suitable for use in field environments, where classic laboratory spectrometers are not suitable due to their size, power consumption and price.
We designed and manufactured a dedicated printed circuit board (PCB), which includes analog signal capture from the sensor, its conversion into digital form and further processing using a microcontroller. Special emphasis was placed on the stability of analog signal capture and correct sensor timing. We also developed software for monitoring the operation of the spectrometer and recording data.
The measurements performed showed that the developed spectrometer successfully detects the spectra of various light sources with a sufficiently high resolution for basic applications. The device operates stably, has low power consumption and is suitable for use as a standalone measurement module.
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