The BNO055 is a wonder. Here's a complete integration with bluetooth: https://www.youtube.com/watch?v=84MOS78-Hso Too bad the schematics are not provided.
The sensor looks easy to use, but it needs calibration: https://www.youtube.com/watch?v=Nz4EozK4cPY If made small enough, a complete device could be useful not only for head tracking, but also to track the orientation of an ambisonic microphone (or a panoramic/360 camera). -- Marc On Sun, 31 Jan 2016 20:16:24 +0100, Bo-Erik Sandholm <[email protected]> wrote : > I copied the wrong link, touch interface is not always good :-) > > I was involved in getting Matthias to support the diy head tracker > with the gy-85 an a aurdino nano with USB connectivity, in the > current setup we need a initial calibration and a pd plugin to > convert to OSC to talk to Reaper daw. > > Now I saw this module, neat and small no calibration needed. > https://www.tindie.com/products/FabLab/pico-platinchen/ > > https://learn.adafruit.com/adafruit-bno055-absolute-orientation-sensor/overview > > http://github.com/arduino-org/Arduino/tree/ide-org-1.6.1.x/libraries/NAxesMotion > > Maybe it overkill and have one processor too much in the chain... > Currently the plan is convert to OSC high speed serial in the > pico-platinchen. > > I will add a esp-01 esp8266 to connect the serial port and send the > OSC data with UDP WiFi to the PC running Reaper. The WiFi setup will > be done in esp-01 code. > > Probably a esp8266 and the BNO055 directly connected could manage it > without the ATmega328P on the pico platinchen. > But currently the cost of for example > http://www.ebay.com/itm/Adafruit-9-DOF-Absolute-Orientation-IMU-Fusion-Breakout-BNO055-PID-2472-/171821750983?hash=item28015fdac7:g:-wYAAOSwBLlVTrbI > is not cheaper than the pico... > > A naked bno055 is 13 usd on ali express but needs a circuit board and > be built to combine with the esp-01. > > So 2 small modules and a battery is the system, and be mounted on the > headband of a headset. > > I am definitely open for all possible forms of cooperation. > Bo-Erik > On 31 Jan 2016 16:58, "Marc Lavallée" <[email protected]> wrote: > > > > > Warning: the discussion is drifting to DIY electronic gadgetry. :) > > > > On Sun, 31 Jan 2016 11:16:26 +0100, > > Bo-Erik Sandholm <[email protected]> wrote : > > > > > I have decided to simplify the DIY head tracking dongle build and > > > setup in some aspects, now I have ordered this sensor that do not > > > need initial calibration. > > > This is the new sensor module: > > > https://learn.adafruit.com/adafruit-neopixel-uberguide/overview > > > > The page is about addressable LED modules. Is it an error? > > > > I would use a GY-85 board and a micro-controller, as seen here: > > http://www.rcgroups.com/forums/showthread.php?t=1677559 > > This is a good starting point. > > > > > It will initially be combined with a esp8266 module for WiFi > > > connectivity or maybe Bluetooth > > > http://www.esp8266.com/wiki/doku.php?id=getting-started-with-the-esp8266 > > > > > http://www.aliexpress.com/item/Promotion-Brand-NEW-HC-05-Wireless-Bluetooth-RF-Transceiver-Module-serial-RS232-TTL/32367579918.html > > > > Could there be some added latency when using wifi or bluetooth? A > > direct usb connection should be faster, but avoiding a cable would > > be desirable because many android devices cannot easily use their > > usb port for communication. If using wifi, I would try multicast > > udp. > > > > Here's a page that explains how to use the bluetooth module: > > > > http://www.instructables.com/id/Cheap-2-Way-Bluetooth-Connection-Between-Arduino-a/ > > > > > Power will probably be from one of these, giving around 10 hours > > > of operations: > > > > > http://www.aliexpress.com/item/4PCS-Hot-Sale-Soshine-900mAh-14500-battery-3-2V-LiFePO4-AA-Rechargeable-Battery/32242320597.html > > > > Nice! > > > > > I will send OSC (open sound control > > > https://en.m.wikipedia.org/wiki/Open_Sound_Control) directly from > > > the sensor. > > > > OSC is a good protocol, but an application specific protocol could > > be designed to be more compact, reducing the latency. > > > > > This should simplify the build of the head tracked sensor, > > > reducing the soldering need. > > > > There would be 4 modules involved: a sensing assembly, a > > micro-controller, a wifi transmission module, and a power supply. > > Going usb-wired would remove the wifi transmitter and the supply. > > > > A custom firmware can be programmed for the ESP-8266, which have > > GPIOs, so maybe it could be used as a micro-controller: > > > > http://hackaday.com/2015/03/18/how-to-directly-program-an-inexpensive-esp8266-wifi-module/ > > > > If a micro-controller is required, the trinket is an alternative to > > the arduino nano: https://learn.adafruit.com/introducing-trinket/ > > It's much smaller, works at 3.2V. For a 5V USB wired version, it can > > provide 3.2 volts for other boards. > > > > > This should simplify the setup of playback using > > > http://www.matthiaskronlachner.com/?p=2015 > > > And maybe later ambiexplorer can be modified to accept OSC data? > > > > It could even be used with a browser (chrome) based player. > > > > In the end, the first problem to avoid is latency, and it can > > invalidate many potential solutions. > > > > > This will allow you to use any headphones and DAC and amplifier > > > > > > Best regards > > > > > > Bo-Erik > > > > I already bought some of the parts to create a head-tracking device, > > months ago. Let's do it and share the designs. Even if we have > > personalized HRTFs with order 1024 decoders, we need head-tracking. > > The other solution is to use the sensors in phones or oculus-like > > devices, but they are all too big or a bit expensive for the task > > of listening to binaural audio only (not combined with visuals). > > > > > _-------------- > > > > > > I want to see a good quality over the ear stereo headphone with > > > all necessary electronics built into the headband. It will have > > > single usb connector which will provide power and digital audio > > > (24 bit) and carry head tracking information back to the > > > computer, which will have the software to play standard first > > > order B-format files decoded to binaural, using simple HRTF > > > filters. The computer can be your desktop, a tablet computer or a > > > mobile. > > > > > > umashankar > > > > For a DIY project, integrating head-tracking and audio would be a > > lot, and the resulting device could be rather large. But I may be > > wrong. > > > > -- > > Marc > > > > _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
