WELL-03 · Wellness Electronics
EMS Heated Neck Massager Control PCBA
A representative wearable architecture combining locally limited electrical stimulation, contact-aware intensity control, regulated heating, battery power, and optional wireless interaction.
Project context
A representative engineering program
A representative wearable architecture combining locally limited electrical stimulation, contact-aware intensity control, regulated heating, battery power, and optional wireless interaction.
System architecture
How the electronics are organized
A rechargeable battery feeds the logic and heater rails plus a controlled stimulation boost stage; an MCU supervises balanced pulse generation, hardware current limiting, electrode-contact feedback, NTC temperature sensing, and local or wireless UI.
Engineering risks to close
What must be resolved before release
- Keep stimulation output controlled as electrode contact and skin-equivalent impedance change.
- Prevent sudden intensity steps during mode changes, reconnection, or brownout recovery.
- Detect heater-sensor faults and localized hot spots independently of the primary firmware loop.
Validation plan
Evidence expected before production
- Measure every intensity level on defined equivalent loads for amplitude, pulse width, frequency, polarity balance, and residual charge.
- Inject open, short, partial-contact, NTC, power-stage, and low-battery faults and verify safe output removal.
- Map skin-side temperature uniformity and exercise bend, sweat, ESD, and wireless coexistence conditions.
Decision-ready evidence packet
What a comparable RFQ should define
This checklist turns the technical story into reviewable inputs and release records. It describes what buyers and manufacturers should agree—not a claim that every listed record applies to every build.
Design baseline
Released schematic or block diagram, interface table, power states, critical constraints, and revision owner.
Manufacturing release
Gerber or ODB++, stack-up, centroid data, assembly drawings, approved DFM dispositions, and panel assumptions.
Material control
Released BOM revision, manufacturer part numbers, AVL or alternate rules, no-substitute lines, MSL handling, and exception approvals.
Validation record
Test method, acceptance criteria, sample or serial identity, measured result fields, and disposition. Example scope: Measure every intensity level on defined equivalent loads for amplitude, pulse width, frequency, polarity balance, and residual charge.
Production release
First-article status plus the agreed SPI, AOI, X-ray, ICT, FCT, programming, rework, OQA, labeling, and packing records.
Project-specific fields, retention periods, sampling rules, measured limits, and customer approvals are confirmed during RFQ and protected under the applicable confidentiality agreement.
Development and production controls
Manufacturing scope represented here
- Contact-aware stimulation control.
- Closed-loop wearable heating.
- Local UI and optional wireless sessions.
Technical image review
Board-level evidence
White-background views are published to make component placement, interfaces and assembly boundaries easier to inspect.
