Tag: #fingerscore

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• FingerScore Hardware 3 — MCU Firmware and Gesture Input Processing

  This post covers the brain of the FingerScore BLE ring device for racket-sports score keeping: the MCU firmware. From the structure of init, main loop, interrupts, and low-power sleep, through detecting buttons and gestu

  2026-06-17 · 17 min read #fingerscore#firmware#mcu#embedded#gesture

• FingerScore Hardware 4 — Designing BLE Wireless Communication (From GATT to Mobile Integration)

  We design the BLE wireless communication at the heart of the FingerScore smart-scoring ring from the ground up. GAP/GATT concepts, a custom score service, pairing security, Web Bluetooth and Android integration, power sa

  2026-06-17 · 15 min read #fingerscore#ble#bluetooth#gatt#embedded

• FingerScore Hardware 6 — PCB Design and Miniaturization (Building It Into a Ring)

  We cover the final step that turns the FingerScore circuit into a real, touchable ring: PCB design. The schematic-to-PCB flow, component placement and routing, ring form-factor constraints, 2.4GHz antenna layout, DFM and

  2026-06-17 · 15 min read #fingerscore#pcb#kicad#antenna#miniaturization

• FingerScore Hardware 2 — Electronics Fundamentals (From Voltage, Current, and Resistance to Digital Signals)

  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 calcul

  2026-06-17 · 23 min read #fingerscore#electronics#hardware#gpio#i2c

• FingerScore Hardware 5 — Power, Battery, and Circuit Design

  We cover, from scratch, the power design that actually keeps the FingerScore ring on. A power budget calculation, coin cell vs. LiPo, charging ICs and protection circuits, LDOs and buck converters, decoupling, low-power

  2026-06-17 · 16 min read #fingerscore#power#battery#lipo#circuit

• Building FingerScore Hardware 1 — System Design and Bill of Materials (BOM)

  This is part one of a hardware series on building the FingerScore ring-shaped score recorder yourself. It walks through translating product requirements into circuits, the system block diagram from sensor to MCU to radio

  2026-06-17 · 29 min read #fingerscore#hardware#electronics#ble#embedded