Mailbag: QMC5883L 3-Axis Compass Module (Schematic, Tests, Arduino Library)

The QST chip on this module is a license build Honeywell HMC5883L … ↓↓↓ Complete description, time index and links below ↓↓↓ First we have a look at the module under the microscope, because 13 components on 2.1cm² are a bit too much for the naked eye. After that we reverse-engineer the circuit and verify that it is indeed fully compatible with our 5V Arduino. But beware! The QST QMC5883L is pin compatible to the Honeywell HMC5883L, but not software compatible. We’ll find a working Arduino library for that thing anyway and do some tests. We have a look at its interrupt output with the scope too. 00:00 Intro – module and pin header in ESD bag inside envelope 00:15 Microscopy – 14mm by 15mm board with 13 components 03:51 Circuitry – reversed engineered, actually quite good 08:20 Warning – not all QMC5883L modules are fully 5V tolerant 08:45 Hookup – to an Arduino with just four wires 09:38 Oscilloscope – timing and voltage level of data ready pin 10:04 Library – for using the QMC5883L with an Arduino 12:16 Interference – it’s a diva when it comes to magnetic fields 13:27 HMC5883L – pin- but not software-compatible to QMC5883L 14:25 Listing – on eBay, in German, but you can get those anywhere 15:12 Wrap-up – more to come about this module, bye Mailbags    • Mailbags   Reviews    • Reviews   #compass #magnetometer #module #mailbag #postbag #firstimpressions #test #review #robertssmorgasbord