Wireless mouse rings offer subtle, reliable pointing interactions for wearable computing platforms. However, the small battery below 27 mAh in the miniature rings restricts the ring's continuous lifespan to just 1-10…
Bridge is an open-source printed circuit board by KawaharaLab, from the KawaharaLab/picoRing_mouse repository on GitHub. It is a 4-layer board of 47 × 70 mm with 84 parts on 54 nets, routed with 409 tracks and 47 vias.
It is built around the KAN1104RT. Its parts include 31 capacitors, 17 resistors, 7 inductors, 6 ICs and 1 connector. It belongs with the interfaces and adapters boards of this library.
Wireless mouse rings offer subtle, reliable pointing interactions for wearable computing platforms. However, the small battery below 27 mAh in the miniature rings restricts the ring's continuous lifespan to just 1-10 hours, because current low-powered wireless communication such as BLE is power-consuming for ring's continuous use. The ring's short lifespan frequently disrupts users' mouse use with the need for frequent charging. This paper presents picoRing mouse, enabling a continuous ring-based mouse interaction with ultra-low-powered ring-to-wristband wireless communication. picoRing mouse employs a coil-based impedance sensing named semi-passive inductive telemetry, allowing a wristband coil to capture a unique frequency response of a nearby ring coil via a sensitive inductive coupling between the coils. The ring coil converts the corresponding user's mouse input into the unique frequency response via an up to 449 uW mouse-driven modulation system. Therefore, the continuous use of picoRing mouse can last approximately 600 (8hrs use/day)-1000 (4hrs use/day) hours on a single charge of a 27 mAh battery while supporting subtle thumb-to-index scrolling and pressing interactions in real-world wearable computing situations.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | C1608_334 | C16, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31 | |
| 9 | 100 | R0603_334 | R2, R3, R5, R6, R7, R8, R13, R14, R15 |
| 8 | SJ_252 | SJ1, SJ2, SJ4, SJ5, SJ6, SJ7, SJ8, SJ9 | |
| 7 | 0.1u | C0603K_334 | C2, C5, C7, C9, C11, C12, C17 |
| 6 | 1.0u | C0603K_334 | C3, C6, C8, C10, C13, C18 |
| 6 | LT6230CS6 | TSOT23-6_261 | IC1, IC2, IC3, IC4, IC5, IC6 |
| 4 | L2012C_334 | L1, L3, L4, L7 | |
| 4 | 0734120114 | 0734120114 | INPUT0, OUTPUT0, READER0, REF0 |
| 3 | @HOLE0, @HOLE1, @HOLE2 | ||
| 3 | 50 | R0603_334 | R1, R4, R10 |
| 2 | 1X09 | JP2, JP3 | |
| 2 | 1X07_325 | JP4, JP5 | |
| 2 | R0603_334 | R16, R17 | |
| 2 | 1X02_325 | GND0, JP1 | |
| 2 | 10k | R0603_334 | R11, R12 |
| 1 | CTRIMTZBX4_334 | C15 | |
| 1 | 4UCONN_20329 | CN2 | |
| 1 | C0603K_334 | C14 | |
| 1 | 0 | R0603_334 | R9 |
| 1 | 0.15u | L2012C_334 | L5 |
| 1 | 0.1u | L2012C_334 | L6 |
| 1 | 0.2u | L2012C_334 | L2 |
| 1 | 10u | C0603K_334 | C1 |
| 1 | 120p | C0603K_334 | C4 |
| 1 | KAN1104RT | KAN1104RT | S1 |
KawaharaLab/picoRing_mouse
Wireless mouse rings offer subtle, reliable pointing interactions for wearable computing platforms. However, the small battery below 27 mAh in the miniature rings restricts the ring's continuous lifespan to just 1-10…
KawaharaLab/picoRing_mouse
Wireless mouse rings offer subtle, reliable pointing interactions for wearable computing platforms. However, the small battery below 27 mAh in the miniature rings restricts the ring's continuous lifespan to just 1-10…
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It measures 47 × 70 mm and has 4 copper layers, 1.6 mm thick.
84 parts, built around the KAN1104RT. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the KawaharaLab/picoRing_mouse repository on GitHub, at the commit this page was made from: the board is circuit/bridge/bridge.kicad_pcb and its schematic circuit/bridge/bridge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask KawaharaLab before reusing the design.
