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Public designs

2 boards

STM32 datalogger PCB in KiCad — battery-backed RTC (LSE crystal), I2C EEPROM, VBAT domain, ERC/DRC verified

4-layer PCB datalogger designed in KiCad — ATmega328P with DS1337 RTC, I2C EEPROM, and UART/SPI/I2C breakouts