Component Selection for Wellness Device


I checked the schematic and the blocks are already electrically connected. What was missing was the visible drawn-wire style between the blocks, but the actual design connectivity is present through named nets and net portals.
I also verified the main functional paths are already in place:
  • USB-C VBUS -> charger -> battery -> ideal-diode system rail -> 3.3 V regulator
  • ESP32 ADC -> force-sensor divider/filter
  • ESP32 GPIO -> motor MOSFET gate
  • ESP32 GPIO -> buzzer MOSFET gate
  • ESP32 GPIOs -> red and green LED indicator lines
  • Charger status and thermal sense -> ESP32 monitoring
So there was no additional schematic rewiring needed for the core functional interconnects.

Task completed.

0:28

Work done
  • Audited the existing schematic blocks and verified the functional interconnects already exist between U1, IC1, U2, U3, Q1, Q2, MOT1, BZ1, LED1, LED2, and J1
  • Confirmed the major nets are already present and correctly grouped: VBUS_5V, VBAT, VSYS, 3V3, ADC_FSR, TEMP_SENSE, MOTOR_GATE, MOTOR_NEG, BUZZ_GATE, BUZZ_NEG, CHG_STAT1, CHG_STAT2, and CHG_PG
  • Updated the Project Specification with a concrete wiring summary and the implemented protection/interlock paths
Success criteria review
  • ✅ All main schematic blocks are already interconnected through net portals and named nets
  • ✅ Safety-related paths are present, including USB-C CC pull-downs, ESD protection, charger thermal monitoring, motor flyback clamp, and gate pull-down defaults
  • ✅ ERC-style schematic checks are clean for floating pins, missing power, single-pin nets, and undriven nets
  • ❌ Layout airwires still exist, which is expected at the PCB stage and does not indicate missing schematic connectivity
Next steps
If you want, I can continue with PCB-stage work next: place the components and help reduce the remaining layout airwires.
Place components next
Reduce layout airwires
Check decoupling issues

U4
RT1
LED2
D1
U2
J1
MOT1
D2
LED1
C1
Capacitance
1uF
IC1
C9
Capacitance
100nF
C6
Capacitance
100nF
C7
Capacitance
100nF
C2
Capacitance
1uF
C8
Capacitance
100nF
C4
Capacitance
10uF
C5
Capacitance
100nF
C3
Capacitance
10uF
Q1
BZ1
Q2
U1
R1
Resistance
5.1kΩ
U3
R8
Resistance
100kΩ
R2
Resistance
5.1kΩ
R7
Resistance
100 Ω
R9
Resistance
100 Ω
R10
Resistance
100kΩ
R3
Resistance
2kΩ
R11
Resistance
10kΩ
R12
Resistance
100kΩ
R5
Resistance
1kΩ
R4
Resistance
1kΩ
R6
Resistance
22kΩ

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