Logical pinout · physical placement not verified

VIN0.1 inch breakout header
Power input; reverse-polarity protected
Type · PowerVoltage · 3-5VDC
GND0.1 inch breakout header
Common power and data ground
Type · GroundVoltage · 0V
3Vo0.1 inch breakout header
3.3V output from onboard regulator
Type · PowerVoltage · 3.3V, up to 100mA
SDA0.1 inch breakout header
I2C data through onboard level shifting/pullups
Type · I2CVoltage · logic referenced to VIN
SCL0.1 inch breakout header
I2C clock through onboard level shifting/pullups
Type · I2CVoltage · logic referenced to VIN
RDY0.1 inch breakout header
Data-ready output from HMC5883L
Type · UnknownVoltage · logic output

Pin	Position	Type	Function	Voltage
VIN	0.1 inch breakout header	Power	Power input; reverse-polarity protected	3-5VDC
GND	0.1 inch breakout header	Ground	Common power and data ground	0V
3Vo	0.1 inch breakout header	Power	3.3V output from onboard regulator	3.3V, up to 100mA
SDA	0.1 inch breakout header	I2C	I2C data through onboard level shifting/pullups	logic referenced to VIN
SCL	0.1 inch breakout header	I2C	I2C clock through onboard level shifting/pullups	logic referenced to VIN
RDY	0.1 inch breakout header	Unknown	Data-ready output from HMC5883L	logic output

Logical pinout · physical placement not verified

Pin details

6 connections

VIN
Power input; reverse-polarity protected
PowerVoltage · 3-5VDC
0.1 inch breakout header
GND
Common power and data ground
GroundVoltage · 0V
0.1 inch breakout header
3Vo
3.3V output from onboard regulator
PowerVoltage · 3.3V, up to 100mA
0.1 inch breakout header
SDA
I2C data through onboard level shifting/pullups
I2CVoltage · logic referenced to VIN
0.1 inch breakout header
SCL
I2C clock through onboard level shifting/pullups
I2CVoltage · logic referenced to VIN
0.1 inch breakout header
RDY
Data-ready output from HMC5883L
UnknownVoltage · logic output
0.1 inch breakout header

Start wiring

I2C · SPI · Analog · 3.3 – 5 V · Breakout

Confirm the data interface matches your host board.

Module pins: VIN, GND, 3Vo, SDA, SCL. Schematik maps them to your board in the app.

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