Sparv Embedded2015

Sparv Embedded

Wearable ECG Monitor Hardware Redesign

Healthcare / Hardware / IoT

A wearable ECG monitor that needed to do more: Bluetooth, and enough storage to hold a full recording. I was at Sparv Embedded, and the work was consultancy for Linkura, whose name is on the boards. The unit was redesigned around those two requirements, with new firmware to match.

A redesign is mostly a component-selection problem

Adding BLE and a large storage capacity to an existing wearable is not a feature you bolt on. It changes the power budget, the layout and the parts list. I did the complete PCB redesign and the component selection behind it, through to the final board design for the ECG unit.

Hand-assembled first, then handed over

A fully hand-assembled prototype run to prove the board, new firmware with BLE integration, and C drivers written for the in-house firmware team to build on. On a short engagement the deliverable that matters is the one the team can carry forward without me.

Engagement: ~6 months
Handed over: Board, firmware, drivers

What I owned

System Developer & Hardware Engineer

Redesigned the PCB for the wearable ECG monitor
Developed new firmware with BLE integration
Added large storage capacity to hardware design
Wrote C-based drivers for firmware development team
Provided hardware design advisory and technical support

Hardware Design / PCB Design / Embedded C / BLE / Firmware Development / Driver Development

Gallery

All projects

1000+ units shipped

Lifee

IoT Health Tracker for Children

Founder & Technical Lead

Hardware Design / Embedded C / FreeRTOS / BLE +4

50+ stations delivered

Mud Masters

Real-time scoring system for GYMRACE fitness competitions

Principal Engineer

Raspberry Pi / Node.js / TypeScript / React +5

CE-certified radio hardware

Invisense

Advanced Humidity Monitoring System

Firmware & Application Developer

Embedded C / FreeRTOS / React Native / Hardware QA +2

Next step

Tell me what you're building

Send me a short description of the problem and I'll tell you whether I'm the right fit, what it would cost, and how long it would take. No pitch deck.

Email me Call +46 70 753 73 78

Email: elinor@wigertztech.se
Phone: +46 70 753 73 78
LinkedIn: elinorwigertz