4 layers30.5 × 17.8 mm
6 layers18.3 × 36.1 mm
Sensor schematics
sugar-sensor/sensor-schematicsSensor HW
- Size
- 18.3 × 36.1 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 70
- Nets
- 160
- Pads
- 438
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20171130)
- Created
- 14 Apr 2025
- Updated
- 30 Apr 2025
Overview
Sensor schematics is an open-source printed circuit board by sugar-sensor, from the sugar-sensor/sensor-schematics repository on GitHub, published under the MIT licence. It is a 6-layer board of 18.3 × 36.1 mm with 70 parts on 160 nets.
It is built around the MAX32630IWG+T, MX25U51245GZ4I54 and MAX14689EWL+T, with the MAX9062EBS+TG45, BMI160 and MAX20303BEWN+T among its other parts. Its parts include 31 capacitors, 15 resistors, 12 ICs, 3 diodes and 3 inductors. It belongs with the sensors and measurement boards of this library.
Main components
10
MAX32630IWG+T
WLP-100(4.4x4.4)-20℃~+85℃ 1.14V~3.6V 10bit 2MB 32 Bit 512KB 66 96MHz ARM Cortex-M4F Built-in FLASH WLP-100(4.4x4.4) Microcontrollers (MCU/MPU/SOC) ROHSMaxim Integrated (Analog Devices)Microcontrollers (MCU/MPU/SOC)
MX25U51245GZ4I54
WSON-8-EP(6x8)NOR FLASHMXIC
MAX14689EWL+T
BGA-9(1.3x1.3)-40℃~+85℃ 1.6V~5.5V 110MHz 2 250mΩ 250us 2:1 30us 50pF BGA-9(1.3x1.3) Analog Switches, Multiplexers ROHSMaxim Integrated (Analog Devices)Analog Switches, Multiplexers
MAX9062EBS+TG45
UCSP-4(1x1)-40℃~+85℃ 1 1.1uA 1.3mV 12mV 15us 1V~5.5V 60pA Open Drain TTL、CMOS UCSP-4(1x1) Comparators ROHSMaxim Integrated (Analog Devices)Comparators
BMI160
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 10uA 16bit 1KB IMU (accelerometer + gyroscope) Motion event detection、Synchronization and timestamp SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSBosch SensortecAccelerometersMAX20303BEWN+T
BGA-56(3.7x4.2)-40℃~+85℃ 400nA 500mA Charging IC、Monitoring IC I2C Lithium Battery Not supported Support BGA-56(3.7x4.2) Power Management - Specialized ROHSMaxim Integrated (Analog Devices)Battery Management
SN74LVC1G04YZVR
DSBGA-4-40℃~+85℃ 1 1.65V~5.5V 1.7V~2V 10uA 2.4V 3.7ns@5V,50pF 32mA 32mA 400mV 700mV~800mV 74LVC Power shutdown protection DSBGA-4 Inverters ROHSTexas InstrumentsInvertersMAX40200ANS+T
BGA-4(0.7x0.7)-40℃~+125℃ 1.5V~5.5V 175mV 6V BGA-4(0.7x0.7) ORing Controllers ROHSMaxim Integrated (Analog Devices)Power Distribution Switches
DX07S024JJ3R1300
SMD-30℃~+80℃ 1 24P 250mA、1.25A 48V Black Female Surface Mount, Right Angle Type-C USB 3.2 SMD USB Connectors ROHSJAE ElectronicsUSB Connectors
SML-LX0404SIUPGUSB
0404120° Common Anode 0404 RGB LEDs ROHSLumexRGB LEDs
README
README.mdDescription
Electrical and mechanical schematics for sugar sensor. Includes PCB design and BOM + Gerber files for sensor production Repository has 2 branches: v1 and v2. Both are based on MAX86141 AFE to work with LEDs. The difference between v1 and v2 are the following:
- v1 uses 3 LEDS (RED, GREEN, BLUE) as light source (non-coherent) while v2 uses 7mW 650nm RED laser (coherent)
- v1 uses AD5933 BioZ controller while v2 uses MAX30002 BioZ controller
- in v2 the main board dependency is removed. Main board replaced with external TinyPICO board and add-ons. Sensor board is stackable
Project notes
- The main reason to move from v1 to v2 of the sensor board is failed tests on non-coherent light sources. "Failed" means prediction based on these measurements didn't work.
- Version 2 deprecates "main" folder with all the schematics for main board (controller). Sensor board is stacked with TiniPICO development board and it is stacked with RGB IPS Display shield from add-ons menu.
- Sensor board programming, testing and obtaining the results is done using MAX32630FHTR application platform. Development was done in Mbed Studio
Structure
- hull for the wearable device
- lib is custom libraries for KiCad
- main is a mainboad schematics. Valid only for v1. Not tested and not produced.
- mech is 3D models for the KiCad component representation on PCB
- sensor is sensor schematic, board, BOM, gerbers for production. Both versions were tested and produced
Parts
70| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C7, C14, C15, C22, C30, C31 |
| 8 | 1uF | Capacitor_SMD:C_0402_1005Metric | C6, C23, C24, C25, C26, C27, C28, C29 |
| 8 | 22uF | Capacitor_SMD:C_0402_1005Metric | C11, C12, C16, C17, C18, C19, C20, C21 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R6, R8, R9 |
| 3 | 1k | Resistor_SMD:R_0402_1005Metric | R12, R13, R14 |
| 3 | 2u2 | Capacitor_SMD:C_0402_1005Metric | C9, C10, C13 |
| 3 | MAX14689EWL+T | Horace:BGA9C40P3X3_124X124X69 | IC1, IC2, IC3 |
| 2 | 2.2uH | Horace:INDC2016X120N | L1, L3 |
| 2 | 3k3 | Resistor_SMD:R_0402_1005Metric | R10, R11 |
| 2 | 434153017835 | Horace:434153017835 | S1, S2 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | MAX40200ANS+T | Horace:BGA4C35P2X2_73X73X50 | D1, D2 |
| 2 | MAX9062EBS+TG45 | Horace:MAX9062EBS&plus_TG45 | U1, U2 |
| 1 | 0 | Resistor_SMD:R_0402_1005Metric | R15 |
| 1 | 10 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 10k | Horace:THRMC0603X33N | TH1 |
| 1 | 10n | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 32.768kHz | Horace:XTAL320X150X90 | Y1 |
| 1 | 39k | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 4.7uH | Horace:1285ASH1R0MP2 | L2 |
| 1 | 499R | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 4k7 | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 4u7 | Capacitor_SMD:C_0402_1005Metric | C8 |
| 1 | 502078-1710 | 5020781710 | J1 |
| 1 | BMI160 | Package_LGA:Bosch_LGA-14_3x2.5mm_P0.5mm | U7 |
| 1 | DX07S024JJ3R1300 | Horace:DX07S024JJ3R1300 | J2 |
| 1 | MAX20303BEWN+ | Horace:BGA56C50P7X8_368X418X69 | IC4 |
| 1 | MAX32630IWG+T | Horace:MAX32630IWG&plus_T | U5 |
| 1 | MAX8532EBT2+T | Horace:MAX8532EBT2&plus_T | U3 |
| 1 | MX25U51245GZ4I54 | Horace:MX25U51245GZ4I54 | U6 |
| 1 | PAN1326B | Horace:PAN1326B | IC5 |
| 1 | SML-LX0404SIUPGUSB | Horace:SML-LX0404SIUPGUSB | LED1 |
| 1 | SN74LVC1G04YZVR | Horace:SN74LVC1G04YZVR | U4 |
Questions
How big is the Sensor schematics PCB?
It measures 18.3 × 36.1 mm and has 6 copper layers, 1.6 mm thick.
What parts does the Sensor schematics use?
70 parts, built around the MAX32630IWG+T, MX25U51245GZ4I54, MAX14689EWL+T and MAX9062EBS+TG45. 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 Sensor schematics KiCad files?
From the sugar-sensor/sensor-schematics repository on GitHub, at the commit this page was made from: the board is main/main.kicad_pcb and its schematic sensor/sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sensor schematics design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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