polyphase

An Isolated design for a demo board using the Analog Devices ADE9078 3 phase AC wattmeter. Design allows both WYE (STAR) and Delta (TRIANGLE) distributions to be measured along with Blondel and non-Blondel measurement schemes. The project includes a SPI based Arduino style library.

A streaming rational-rate FIR resampler with explicit causal indexing, bounded history and chunk-invariant output. Synthetic numerical demos verify interpolation, decimation and flush behavior without audio playback.

High-quality audio sample rate conversion for Go — polyphase windowed-sinc, dependency-free, with alias rejection and round-trip SNR measured in the test suite.