Small case for EDTracker DIY build (does not house the official PCB), I used a 6 pin JST connector inside to join the MPU and Pro Micro, connected via the following:

(Pro Micro left, MPU Right)

VCC > VCC GND > GND P3 > SCL P2 > SDA GND > ADD P7 > INT

Tolerances are tight as it's pressure fit, it should hold itself together well, if you don't use a connector or have enough wire inside use a little foam to keep the MPU and Pro micro apart, otherwise it's fairly self explanatory.

If you find the parts are not tight enough or are too tight try adjusting your extrusion multiplier + or - 5% or so, this should be enough to get a snug fit unless your calibration is way out, this is by far the easiest way to adjust it but if you go too low your part will lose strength.

With the 9250 or 9150 orientation matters, best way to check is to line up the P3 / P2 and SCL / SCA pins on the boards, this will ensure correct orientation when in use.

I'm planning an update using some proper pin connections between these two and wires for the rest, this should allow a smaller profile, I'll add this as a remix when I get time.

When orientated on headphones the Pro Micro should be up, if you're seeing strange movements in the EDTracker GUI such as drifting back to centre this is most likely the cause.

See here for EDTracker info and to download the GUI for flashing and calibration http://www.edtracker.org.uk/

Parts list:

• Pro Micro Arduino, 16mhz 5v version (£3 approx from China on eBay)
• MPU 9250 or 9150 (again about £2 to £3 on eBay, make sure you get a 5v capable one)
• Micro JST 6 pin male and female (£1 ish)

Along with a little soldering and printing, less than £10 for a pretty brilliant head tracker!

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Category: Video Games