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4 layers17.1 × 60.2 mmSolBuddy, the printed circuit board in 3D

Wearable circadian rhythm tracker

Size
17.1 × 60.2 mm
Copper layers
4
Thickness
1.61 mm
Parts
44
Nets
69
Pads
208
Tracks, vias
467, 85
Pours
3
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
11 Sep 2026
Updated
2 Oct 2026

Overview

SolBuddy is an open-source printed circuit board by sebgle, from the sebgle/SolBuddy repository on GitHub. It is a 4-layer board of 17.1 × 60.2 mm with 44 parts on 69 nets, routed with 467 tracks and 85 vias.

It is built around the MDBT50Q-1MV2, MX25R6435FZAIH0 and MAX17048G+T10, with the USBLC6-2SC6, MCP73831T-2ACI/OT-HXY and SM02B-SRSS-TB among its other parts. Its parts include 15 capacitors, 11 resistors, 7 ICs, 3 connectors and 1 switch. It belongs with the nRF52 and nRF5x boards of this library.

Main components

6

README

README.md

Front of the pcb Back of the pcb Side of the pcb Schematic Block diagram

Parts

44
QtyValueFootprintReferences
5100nFCapacitor_SMD:C_0402_1005MetricC5, C6, C13, C14, C15
510kΩResistor_SMD:R_0402_1005MetricR3, R6, R7, R8, R9
54.7µFCapacitor_SMD:C_0603_1608MetricC1, C2, C7, C8, C11
4TestPointTestPoint:TestPoint_Pad_D1.0mmTP1, TP2, TP3, TP4
210µFCapacitor_SMD:C_0603_1608MetricC3, C4
22.2kΩResistor_SMD:R_0402_1005MetricR4, R5
220 pF, C0G/NP0Capacitor_SMD:C_0402_1005MetricC9, C10
25.1kΩResistor_SMD:R_0402_1005MetricR10, R11
11µFCapacitor_SMD:C_0402_1005MetricC12
12.2 µHeasyeda2kicad:IND-SMD_L2.0-W1.6-BL1
120kΩResistor_SMD:R_0402_1005MetricR1
122ΩResistor_SMD:R_0402_1005MetricR2
132.768 kHzCrystal:Crystal_SMD_3215-2Pin_3.2x1.5mmY1
1AS7343Package_LGA:AMS_OLGA-8_2x3.1mm_P0.8mmU4
1Conn_01x06Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_VerticalJ2
1LOGOLOGOG***
1MAX17048G+T10easyeda2kicad:TDFN-8_L2.0-W2.0-P0.50-BL-EP1.2U5
1MDBT50Q-1MV2RF_Module:Raytac_MDBT50QU3
1MX25R6435FZAIH0easyeda2kicad:USON-8_L4.0-W4.0-P0.80-BL-EPU6
1SM02B-SRSS-TBConnector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_HorizontalJ1
1SW_Pusheasyeda2kicad:SW-SMD_L3.9-W3.0-P4.45SW1
1USBLC6-2SC6Package_TO_SOT_SMD:SOT-23-6U7
1USB_C_ReceptacleConnector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12J3
1buckeasyeda2kicad:WSON-12_L3.0-W2.0-P0.50-BL-EPU2
1chargereasyeda2kicad:SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BLU1

Questions

How big is the SolBuddy PCB?

It measures 17.1 × 60.2 mm and has 4 copper layers, 1.61 mm thick.

What parts does the SolBuddy use?

44 parts, built around the MDBT50Q-1MV2, MX25R6435FZAIH0, MAX17048G+T10 and USBLC6-2SC6. 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.

Where can I download the SolBuddy KiCad files?

From the sebgle/SolBuddy repository on GitHub, at the commit this page was made from: the board is pcb/revA/revA.kicad_pcb and its schematic pcb/revA/revA.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the SolBuddy design in my own project?

Its repository states no licence, so its author keeps all rights: ask sebgle before reusing the design.

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