Description: The HMC6343 is a fully integrated high end electronic compass module that can compute and give you a heading direction that’s accurate within a couple degrees. It is tilt compensated and is calibrated to handle magnetic distortions. This breakout board allows for easy use of the HMC6343. All that is required is power and I2C connections to a microcontroller so that the module can receive commands and send data back to the user.
The IC combines 3-axis magneto-resistive sensors and 3-axis MEMS accelerometers, analog and digital support circuits, a microprocessor and algorithms in firmware required for heading computation. The HMC6343 Breakout needs to be supplied with 3.3V @ 4.5mA and can measure and compute a heading direction every 200ms (5Hz). This board for the HMC6343 breaks out the all the pins you’ll need to send commands and collect data from the electronic compass including GND, 3.3V, SDA, and SCL.
Based on 2 ratings:
Being able to get this chip on a breakout board has been extremely helpful for my prototyping effort. The example code was helpful, but I made my own set of functions since I’m using a PIC and I2C commands are different. I did also find the PIC I2C to HMC interface requires about 5K of pull-up to provide clean waveforms, as with 10K pull-ups they were heavily rounded off (although still worked). So I just put another set of 10K’s in parallel with the ones on the breakout board and it cleaned right up. It’s probably a PIC thing. Overall, I’m very pleased with the breakout board. The chip functionality is nice, also, and certainly offloads some of the processing software I would otherwise need on the micro if I went with one of the less expensive heading ICs (for my application).