Technical task: improvement of the 3-in-1 wireless charger

Budget: 66 EUR Deadline: 2 days

Good day!

I have reviewed your project. I can offer collaboration with an engineer who has a relevant education in the field of electrical engineering and many years of practical experience in developing electronic circuits, calculating electrical parameters, selecting components, and working with electronic devices.

We are ready to thoroughly study your current project, assess the feasibility of implementing a third charging channel for the Apple Watch, perform the necessary calculations, and propose a technical solution. If needed, we can start with an engineering consultation, and after agreement, proceed to refine the circuit and board.

We would be happy to discuss the details of your project.

Budget: 70 EUR Deadline: 2 days

Hello!

I am ready to join the project for the refinement of a wireless charging station for 3 devices, including the addition of a separate channel for the Apple Watch.

I have experience in the development and refinement of electronics, including wireless power systems, high-frequency nodes, coil calculations, thermal modes, component selection, and preparation of schematics/PCBs in KiCad. I can engage in both full engineering development and in a consulting format with calculations and recommendations for your team.

What I can do for your project:

analyze the current charging architecture for 2 devices;
add a third channel for the Apple Watch;
select and calculate the coil, matching, circuitry, and connection scheme;
evaluate the implementation of correct Apple handshake and compatibility with Qi/Qi2;
check the possibility of stable simultaneous charging of three devices;
calculate the required power supply, currents, efficiency, heat dissipation, and heating;
provide recommendations on coil shielding and layout within a wooden case;
refine the schematic and PCB in KiCad;
prepare engineering recommendations on safety, manufacturing, and further certification.
Regarding your questions:

Experience with Qi/Qi2 wireless chargers: yes, I have experience working with wireless power transmission nodes, coil selection/matching, power calculations, EMC, and thermal modes.
Experience with Apple Watch / MFi components: I can address compatibility issues, limitations regarding Apple Watch charging architecture, handshake, and possible implementation options considering the available components and licensing restrictions.
Calculations for coils, power, heating, and shielding: yes, I perform these.
Similar projects: I can provide examples of relevant work/cases upon request, if convenient — in private correspondence.
I see two possible scenarios for work:

Full development — analysis of the current board, calculations, refinement of the schematic and PCB, recommendations on design.
Engineering consultation — technical conclusion, calculations, risks, recommendations, and support for your specialist during implementation.
To get started, it would be preferable to receive:

the current schematic and PCB;
parameters of existing coils;
3D models/case limitations;
information on the target power supply;
requirements for power and scenarios for simultaneous charging.
I am ready to discuss the details, assess risks regarding the Apple Watch, and propose the optimal path for implementation in terms of timelines, costs, and technical feasibility. Expand