Compact Smartwatch PCB Design & Prototyping
Budget: €250 – €750 EUR
Design and Prototype a Compact Wearable Smartwatch PCB (BLE, Sensors, Charging)
We are looking for an experienced hardware design engineer or embedded system developer to help us design and prototype a compact wearable smartwatch PCB for real-time physiological data collection, wireless communication, and onboard data storage.
You will be working from an existing schematic (partially ready but need modification and will be provided as a PDF from Altium Designer) and are expected to optimize, design, and deliver a production-ready device (prototype) as well as deliver Schematic/PCB layout, bill of materials, and firmware.
Scope of Work:
Schematic Review & Optimization
Analyze the provided schematic for completeness, efficiency, and best practices
Recommend improvements to power routing, signal isolation, and component selection
PCB Design
Create a compact, wearable-friendly board layout (preferably 4-layer)
Ensure proper RF design for Bluetooth (impedance matching, antenna layout)
Design for low noise in analog signal paths (EDA, PPG)
Include test points, USB-C interface, and programming/debugging access
BoM Finalization
Confirm part availability through major suppliers (DigiKey, Mouser, LCSC)
Suggest replacements if parts are obsolete or have long lead times
Deliverables
. Full PCB design source files (only Altium Designer is accepted)
. Gerber files, BoM, and pick-and-place file
.Full firmware for sensor data storage, communication (with PC) and BLE
. Power tree diagram, block diagram, and documentation
Optional but Preferred
. 3D enclosure support (mechanical integration)
. Pre-compliance design tips for FCC/EMC
Key Technologies and Components:
Microcontroller + BLE: NINA-B306 (nRF52840), Arduino IDE
Sensors:
MAX30101 (optical heart rate / SpO2 sensor)
LSM6DSM (accelerometer + gyroscope)
ADS1113 + EDA frontend (EDA measurement)
AS6221 (temperature sensor)
Memory: W25N01GV (1 Gbit SPI NAND flash)
Power Management:
BQ24230 (Li-Ion charging over USB-C)
TPS61022 (boost converter)
MIC5365 (1.8V LDO)
Connectivity: USB-C (with ESD protection)
Indicators: RGB LED
see attachement.
We are looking for an experienced hardware design engineer or embedded system developer to help us design and prototype a compact wearable smartwatch PCB for real-time physiological data collection, wireless communication, and onboard data storage.
You will be working from an existing schematic (partially ready but need modification and will be provided as a PDF from Altium Designer) and are expected to optimize, design, and deliver a production-ready device (prototype) as well as deliver Schematic/PCB layout, bill of materials, and firmware.
Scope of Work:
Schematic Review & Optimization
Analyze the provided schematic for completeness, efficiency, and best practices
Recommend improvements to power routing, signal isolation, and component selection
PCB Design
Create a compact, wearable-friendly board layout (preferably 4-layer)
Ensure proper RF design for Bluetooth (impedance matching, antenna layout)
Design for low noise in analog signal paths (EDA, PPG)
Include test points, USB-C interface, and programming/debugging access
BoM Finalization
Confirm part availability through major suppliers (DigiKey, Mouser, LCSC)
Suggest replacements if parts are obsolete or have long lead times
Deliverables
. Full PCB design source files (only Altium Designer is accepted)
. Gerber files, BoM, and pick-and-place file
.Full firmware for sensor data storage, communication (with PC) and BLE
. Power tree diagram, block diagram, and documentation
Optional but Preferred
. 3D enclosure support (mechanical integration)
. Pre-compliance design tips for FCC/EMC
Key Technologies and Components:
Microcontroller + BLE: NINA-B306 (nRF52840), Arduino IDE
Sensors:
MAX30101 (optical heart rate / SpO2 sensor)
LSM6DSM (accelerometer + gyroscope)
ADS1113 + EDA frontend (EDA measurement)
AS6221 (temperature sensor)
Memory: W25N01GV (1 Gbit SPI NAND flash)
Power Management:
BQ24230 (Li-Ion charging over USB-C)
TPS61022 (boost converter)
MIC5365 (1.8V LDO)
Connectivity: USB-C (with ESD protection)
Indicators: RGB LED
see attachement.