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Shelly H&T is the worst H& T out there. I’ve got 4 of them in my house and they are just atrocious. I was looking up for a way to flash them with ESPHome but apparently Alterco refuses to share the GPIO pinouts.
Abstract: This article compares the merits of integrating and sigma delta ADC architectures for panel meter applications. It focuses on the difficult-t o-understand concepts of over-sampling, noise shaping, and decimation filtering. It includes a description of a new family of panel-meter-specific ICs, the MAX1491-MAX1499.
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