Temperature and Humidity Sensor Node Design
Thought for 1 min 3 sec
I’ll create a low‑power USB‑C 5 V environmental node with a digital T/RH sensor and a dual‑radio Wi‑Fi/BLE MCU, including robust input protection sized for 0.5–3 A sources.
Plan:
- Add MCU, digital T/RH sensor, USB‑C receptacle, 3.3 V regulator, eFuse/load switch, and passives; include bidirectional USB data‑line TVS with capacitance below 1 pF per line.
- Implement USB‑C sink (CC pull‑downs), VBUS reverse/OVP/UVLO/OCP, and ESD; size power path for up to 3 A sources.
- Power: 5 V to 3.3 V with low quiescent current; observe minimum load requirements; decouple per ICs.
- RF/I/O: choose antenna type and keepouts; route I2C with pull‑ups; add programming/status.
- Connect nets, run ERC/DRC, and prep placement isolating switcher returns from sensor grounds to prevent ground bounce coupling.
Questions to finalize before I start:
- Any preference for antenna (chip, PCB trace, or external connector)?
- Target sensor accuracy (for RH/Temp) and measurement cadence?
- Size constraints or enclosure considerations? Click Start on the plan bar when ready.
Pick specific MCU
Choose sensor part
Antenna decision
USB-C protection parts
Form factor constraints
To get started, talk to Flux or create a New Document.
