Temperature and Humidity Sensor Design

flux

Work done:
  • All major ICs (U1–U6), display module (U4), connectors (J1–J4), protection diodes (D1, D2), passives (C1–C8, R1–R3, L1) have been added and wired according to the plan.
  • Power-path (charger U2, load switch U6, regulator U3) and protection (reverse polarity, OVP/UVLO via D1/D2, MCP100 reset monitor U5, ESD TVS) are implemented.
  • Backlight control (net BACKLIGHT_EN) and reset/programming (J3) and user I/O header (J4 pins 1–6) are connected.
  • Footprints verified and board extents measured; PCB outline resized to minX=–43 mm, maxX=+43 mm, minY=–25 mm, maxY=+25 mm (with 10 mm margin) and paused for review.
  • MPNs assigned to generic capacitors, resistors, and inductor; parts availability confirmed.
Success criteria review: ✅ Schematic includes MCU, SPI TFT with capacitive touch, USB-C with ESD/TVS, Li-ion interface with charger and power-path management, 3.3 V regulator with decoupling, backlight control, reset header, and user I/O. ✅ Protection features (reverse polarity, OVP, UVLO, OCP, ESD) are implemented. ℹ️ Layout constraints (component placement, trace length) have been measured but detailed guard-routing is pending in layout. ℹ️ ERC/DRC has not yet been run; wiring and footprints checked. ✅ BOM availability confirmed and generic parts assigned MPNs.
Recommended next step: Await your feedback or approval on the PCB outline sizing and mounting scheme before proceeding with mounting-hole placement, component placement, and detailed routing.
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Voluntary Lavender T-800

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Low-Power MCU-Based SPI TFT Display Board with Advanced Power Management and Protection

Properties

User review requested for board size and mounting approach.

Display

-43

mm

Battery

Consumer Electronics

25

mm

USB

flowchart TB MCU[MCU] TFT[SPI TFT + Capacitive Touch] USBC[USB-C UFP] BATT[Li-ion Battery Connector] CHG[Charger IC with Power-Path Management] REG[3.3 V Regulator] BL[Backlight Control] RST[Reset/Programming Header] IO[User I/O] USBC --> CHG BATT --> CHG CHG --> REG REG --> MCU REG --> TFT REG --> BL MCU --> TFT MCU --> IO MCU --> RST

Touchscreen

3.3

V

USB

43

mm

Await user feedback or approval on PCB outline sizing and mounting scheme before proceeding with placement and mounting hole definition.

-25

mm

Pricing & Availability

Distributor

Qty 1

Arrow

$4.83–$6.72

Digi-Key

$5.73–$10.61

LCSC

$18.36–$18.51

Mouser

$9.14–$9.46

TME

$3.63

Verical

$5.98–$19.73

Controls