https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Wed, 17 Jun 2026 00:00:00 GMT https://www.youngju.dev/blog/architecture/2026-06-17-fingerscore-electronics-fundamentals.en https://www.youngju.dev/blog/architecture/2026-06-17-fingerscore-electronics-fundamentals.en Everything you need from electronics fundamentals to build the FingerScore ring device, in one piece. We walk through Ohm law and voltage dividers, pull-up and pull-down resistors, capacitors, LED current-limiting calculations, GPIO and logic levels, I2C/SPI/UART, ADC, and measurement with a multimeter and oscilloscope, in a way a beginner can follow. Wed, 17 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) fingerscoreelectronicshardwaregpioi2cembedded https://www.youngju.dev/blog/architecture/2026-06-17-fingerscore-electronics-fundamentals.ja https://www.youngju.dev/blog/architecture/2026-06-17-fingerscore-electronics-fundamentals.ja FingerScore のリングデバイスを自作するために必要な電子工学の基礎を一本にまとめます。オームの法則と分圧、プルアップ／プルダウン抵抗、コンデンサ、LED の電流制限計算、GPIO とロジックレベル、I2C/SPI/UART、ADC、テスターとオシロスコープでの測定まで、初心者でも追えるように解説します。 Wed, 17 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) fingerscoreelectronicshardwaregpioi2cembedded https://www.youngju.dev/blog/architecture/2026-06-17-fingerscore-electronics-fundamentals https://www.youngju.dev/blog/architecture/2026-06-17-fingerscore-electronics-fundamentals FingerScore 링 디바이스를 직접 만들기 위한 전자공학 기초를 한 편에 정리합니다. 옴의 법칙과 전압 분배, 풀업/풀다운 저항, 커패시터, LED 전류 제한 계산, GPIO와 로직 레벨, I2C/SPI/UART, ADC, 멀티미터와 오실로스코프 측정까지 초보자도 따라올 수 있게 설명합니다. Wed, 17 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) fingerscoreelectronicshardwaregpioi2cembedded