Timeshark is a custom-built platform for display of timing & scoring
information for Underwater Hockey tournaments. uwh-display is the software
we built that runs on top of it.
http://navisjon.com/ultimate-uwh-camera/
https://www.gofundme.com/ultimateuwhcamera
Prerequisites:
- cmake
- make
- g++
- swig
- python-dev
- libxbee
- lit
On Linux:
$ git clone --recursive [email protected]:Navisjon/uwh-display.git
$ cd uwh-display
$ mkdir build
$ cd build
$ cmake ..
$ make -j$ make test$ sudo ./bin/uwhdd
Timeshark started with a water-resistant CNC machined Delrin enclosure. The platform was built on top of a Raspberry Pi 2, with a perfboard-prototyped Pi Hat logic board for driving the chain of off-the-shelf 32x32 LED panels.
The first version of the controller was a simple iPhone app, connected to the display over WiFi. It had basic functionality for updating scores, and starting/stopping/setting the game clock.
The second version of Timeshark sported a custom made waterproof enclosure, with wireless communication over the Zigbee protocol.
For this one we designed a custom PCB, and ordered prints of it from OshPark. This version includes level-shifting buffer chips to convert from the Pi's 3.3v signals to the 5.0v that the displays prefer, which seems to stabilize the image and reduce glitches as compared to v1.0. Also included in this version is a Series 2 Zigbee, with ip68 bulkhead connection and underwater cabling to get the signal up to the surface.
For the controller, we built a stand-alone water-resistant touchscreen console. Internally, it has a Raspberry Pi v2, and another custom PCB from OshPark, along with a 7" display, and wireless remote.
Seeing the difficulty in updating the software on the waterproofed displays, we opted to upgrade to Raspberry Pi 3's in order to take advantage of their onboard WiFi chip. Unfortunately, the power budget for the 3.3v rail on the newer Pis is not enough to drive the power-hungry Zigbee radios. This meant a bit of electrical re-work to add an external 3.3v supply to the logic boards on both the displays' PCBs and on the controllers'.
