OHM-0003Design demo · no physical photo
OHM-0003
I2C Environment Sensor Breakout — 2-layer, 20 × 30 mm
Concept example2 layersRev A
- MCU
- None (I2C peripheral)
- Input
- 3.3V via JST-SH
- Layers
- 2
- Size
- 20 × 30 mm
- Parts
- 8
- Assembly
- Single-sided
- Fabrication
- Not fabricated
- Physical testing
- Not physically tested
Shipping extra
01
Prompt
I2C breakout board with SHT40 temperature and humidity sensor and BMP280 barometric pressure sensor. Two JST-SH 4-pin connectors (Qwiic / STEMMA QT compatible) for daisy-chaining. 3.3V input. Board size around 20 × 30 mm.
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Schematic
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Layout & 3D
Top
Bottom
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Key features
A small breakout board combining SHT40 (temperature and humidity) and BMP280 (barometric pressure) sensors on one I2C bus. Two JST-SH 4-pin connectors (Qwiic / STEMMA QT pinout) allow daisy-chaining with other I2C modules. Commonly used by makers.
- •SHT40 temperature and humidity sensor (±0.2 °C, ±1.8% RH)
- •BMP280 barometric pressure sensor (±1 hPa)
- •Two JST-SH 4-pin connectors (Qwiic / STEMMA QT compatible)
- •I2C pull-up resistors (2.2 kΩ) included
- •3.3 V only (do not use with 5 V logic)
- •Mounting holes: 2 × M2.5
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Notes
- I2C addresses: SHT40 = 0x44, BMP280 = 0x76 (SDO pin grounded).
- Both sensors require 3.3 V; connecting to 5 V will damage them.
- Recommended I2C speed: 100 kHz (standard mode).
- Typical current consumption: <1 mA active, <1 μA sleep.
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Files
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