coin-cell

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kevinkessler / TemperatureHumidityEPD

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STM32L0 Source code for my low powered Temperature/Humidity ePaper Display

hackaday temperature-sensor low-power stm32l0 temperature-humidity-sensor coin-cell

Updated Jan 17, 2024
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vishnumaiea / Birthday-Alarm

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An Arduino powered birthday reminder device that'll wish you happy birthday for almost 50 years on a single CR2450 coin cell.

arduino rtc low-power birthday-alarm coin-cell isl1208 cr2450 intersil

Updated Mar 27, 2018
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roepkefeller / business-card-pcb

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A PCB business card that shows you your own pulse. Optical PPG sensor drives a ten-LED heart; NFC tag serves the vCard with the card switched off. ATtiny1616, MAX30102, CR2032. KiCad sources, firmware and power measurements.

avr embedded electronics open-hardware nfc heart-rate kicad fnirs photoplethysmography ppg biomedical-engineering ntag max30102 coin-cell pcb-art attiny1616 pcb-business-card megatinycore

Updated Aug 21, 2026
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