WELL-03 · Wellness Electronics
EMS Heated Neck Massager Control PCBA
A representative EMS heated neck massager PCBA reference: limited electrical stimulation, contact-aware intensity control, regulated heating, battery power, and BLE control.
Project context
How this product is typically engineered
A representative EMS heated neck massager PCBA reference: limited electrical stimulation, contact-aware intensity control, regulated heating, battery power, and BLE control.
System architecture
Typical architecture
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 resolve
Decisions to close 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
Checks to define 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.
What to put in the RFQ
Files and records to agree before quoting
Use this list to agree the build inputs and release records for a similar product. The final set depends on the project.
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.
During RFQ review, we confirm the required fields, sampling, limits, approvals, and record-retention period. Confidential project information stays within the agreed access rules.
Development and production controls
Typical manufacturing scope
- 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.
