Temperature and Humidity Sensor Design

flux

0:00

Work Completed
  • Updated project description to “Low-Power Dual-Radio Environmental Sensor Node with Robust USB-C Protection”
  • Added System Architecture property (Mermaid diagram)
  • Added core ICs:
  • Added power-protection components:
    • U3 as U3 (eFuse)
    • D1 as D1 (TVS/ESD)
  • Added 3.3 V regulator:
    • U4 as U4
  • Added passives:
    • 5× C1–C5 (bulk/decoupling)
    • 4× R1–R4 (4.7 kΩ I²C pull-ups, 56 kΩ CC pull-downs)
  • Added USB-C connector with CC resistors:
    • J1 as J1
  • Connected all power, ground, CC, I²C, and control nets correctly
  • Defined antenna keepout area and resized PCB to 58 mm × 22.8 mm
  • Assigned footprints for all components and added four mounting holes
  • Ran ERC (no errors)
Pending Tasks
  • Component placement on PCB layout (automated placement agent cannot be run)
  • Net routing (Auto-Layout routing agent cannot be run)
Success Criteria Review
  • ✅ Schematic contains MCU, sensor, USB-C, eFuse, TVS, and 3.3 V regulator
  • ✅ Critical nets (power, I²C, CC) are correctly connected with pull-ups/downs and decoupling
  • ✅ PCB layout is prepared with antenna keepout and correct board size; ERC passed
  • ⚠️ DRC checks require completed routing
Recommended Next Step
Proceed with placing components on the PCB and initiating the Auto-Layout routing to complete the layout and pass DRC checks.
135 days

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U3
C1
Capacitance
10uF
U1 AGND - U2 GND
J1
U4 VO - U1 3.3V
U1 AGND - U2 GND
J1 CC1 - R3 P1
U4
R4 P2 - D1 G
C3
Capacitance
1uF
U1 AGND - U2 GND
Hole2
Hole4
C5
Capacitance
100nF
J1 VBUS4 - U3 IN_1
GND
U3 IN_3 - U3 IN_4
U1 IO22 - U2 SCL
J1 VBUS4 - U3 IN_1
J1 GND4 - C1 P2
U3 OUT_5 - U4 VI
U4 VO - U1 3.3V
C5 P2 - R3 P2
Hole1
U1 IO21 - U2 SDA
R4 P2 - D1 G
J1 VBUS4 - U3 IN_1
C2
Capacitance
1uF
U1 IO21 - U2 SDA
C4
Capacitance
100nF
U4 VO - U1 3.3V
D1
U1
Hole3
U3 OUT_5 - U4 VI
U3 IN_3 - U3 IN_4
U1 AGND - U2 GND

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Low-Power Dual-Radio Environmental Sensor Node with Robust USB-C Protection

Properties

V

Pricing & Availability

Distributor

Qty 1

Arrow

$3.37–$5.87

Digi-Key

$3.80–$3.91

LCSC

$10.43

Mouser

$3.01

TME

$0.84

Verical

$3.19–$5.54

Assets

No assets added.

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