SainSmart HMC5883L Digital Compass Module 3 Axis Magnetoresistive Sensor for Arduino UNO MEGA R3 Mega2560 Duemilanove Nano Robot
Overview : The small board integrated HMC5883L all the necessary resistance and capacitance, only an external power supply, the SDA and SCL lines to read data through the IIC interface. Applications : smart phones, sports watch, handheld compass, automotive electronics and so on. Specifications : Board size: 16mm 18mm. Supply voltage: 3.3V or 5V. Pin spacing: 2.54mm.