so that the sample can be tested across the whole light spectrum. The prism is rotated by a servo motor, which exposes the sample to the full rainbow, while an Arduino uses a light-dependent ...

Stock, this radio module is just okay, but with a few modifications, it can be turned into a very good receiver with a spectrum analyzer ... and by adding a simple Arduino, the complete ...

spectrum using long-range, low-data-rate protocols such as Sigfox and LoRa. The physical layout of the boards is also open source, allowing third-party vendors to adopt the Arduino boards ...