Devesh36/key-finder

A compact BLE key finder for keys, bags and remotes: replaceable CR2032, piezo alert, status LED and pair button in a 38 mm black keyring enclosure. Includes routed PCB, enclosed/exploded assembly and BOM. Firmware/app and physical qualification remain separate.

Version
0.1.2
License
unset
Stars
0

docs/BOM.csv

References,Quantity,Manufacturer,Manufacturer part number,Value/function,Package/size,Source
U1,1,Insight SiP,ISP1807-LR-RS,nRF52840 BLE module with antenna,8 x 8 x 1 mm LGA,JLC C5264268
BT1,1,MYOUNG,MY-2032-16,CR2032 holder,24.5 x 9 x 3.75 mm clip envelope,JLC C2902340
CELL1,1,Panasonic,CR2032,3 V primary lithium cell,20 x 3.2 mm,Replaceable battery
BZ1,1,PUI Audio,AB1541B-LW100-R,4.1 kHz wired piezo disc,15 x 0.18 mm plus wire joints,DigiKey 668-1448-ND
SW1,1,G-Switch,1TS026A-1600-0553-CT,Pair/silence tactile switch,3 x 1.6 x 0.55 mm,JLC C913784
LED1,1,XINGLIGHT,XL-1608SURC-06,Red status LED,0603 / 1.6 x 0.8 mm,JLC C965799
C1,1,Samsung Electro-Mechanics,CL10B104KB8NNNC,100 nF,0603 / 1.6 x 0.8 mm,Native tscircuit 0603
C2,1,Samsung Electro-Mechanics,CL21A106KPFNNNE,10 uF,0805 / 2 x 1.25 mm,Native tscircuit 0805
R1 R2,2,Yageo,RC0603FR-071KL,1 kohm,0603 / 1.6 x 0.8 mm,Native tscircuit 0603
R3,1,Yageo,RC0603FR-073K3L,3.3 kohm,0603 / 1.6 x 0.8 mm,Native tscircuit 0603
R4 R5,2,Yageo,RC0603FR-07100KL,100 kohm,0603 / 1.6 x 0.8 mm,Native tscircuit 0603
TP1 TP2 TP3 TP4 TP5,5,PCB feature,,Programming test pads,1.2 mm exposed pads,No purchased part
CASE_BACK CASE_FRONT,2,Custom,,Black PETG enclosure,38 mm overall diameter,Native assembly printed parts
PAIR_BUTTON STATUS_LENS,2,Custom,,Button and translucent status lens,See mechanical STL exports,Native assembly printed parts