Bme280-i2c breakout

chaitya37·bme280-i2c-breakout

Bme280-i2c breakout layout, top view — open source board by chaitya37

About the Bme280-i2c breakout

Bme280-i2c breakout is an open source PCB design by chaitya37, published on GitHub. It is a 2-layer board measuring 14.5 × 13.5 mm, with 5 components from 4 distinct parts.

Other key parts include the BME280. By type, the board carries 2 resistors, 1 IC, 1 connector and 1 capacitor.

It belongs with the sensors, dev boards & breakouts and power & battery designs in this gallery.

From the project

KiCad breakout board for the bosch BME280 sensor. I2C interface with onboard pullups and decoupling- ready to plug any microcontroller project

A minimal, ready-to-use I2C breakout board for the Bosch BME280 temperature/humidity/pressure sensor. Designed in KiCad — exposes a clean 4-pin interface (VCC, GND, SDA, SCL) for easy connection to any microcontroller.

See schematic.pdf for the full schematic.

- I2C pull-ups (4.7kΩ on SDA/SCL): Required since I2C is an open-drain bus — without pull-ups, the lines can't idle high, and no communication is possible. - Decoupling (100nF ceramic on VDD): Placed directly next to the sensor's VDD pin for a clean, local power supply during measurement cycles. - CSB tied to 3.3V: Forces the sensor…

Main components on the Bme280-i2c breakout

Bme280-i2c breakout bill of materials (BOM)

5 components, 4 distinct parts.

Qty	Part	Footprint	Refs
1	BME280	Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering	U1
1	Conn_01x04_Pin	PinHeader_1x04_P2.54mm_Vertical	J1
1	100n	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C1
2	4.7k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R2

Bme280-i2c breakout design files

The KiCad project lives in the chaitya37/bme280-i2c-breakout repository on GitHub; these links point at the commit this page was built from.

LayoutBme280 sensor.kicad_pcb
SchematicBme280 sensor.kicad_sch

Bme280-i2c breakout: common questions

How big is the Bme280-i2c breakout?

The Bme280-i2c breakout measures 14.5 × 13.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bme280-i2c breakout?

5 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bme280-i2c breakout design files?

From the chaitya37/bme280-i2c-breakout repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Bme280-i2c breakout design in my own project?

The repository has no license, so all rights stay with chaitya37. Use it as a reference, and ask the author before reusing the design.

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