Heads Up Display for use with Stratux. Designed for reflective HUD screens, intended for traffic call outs.
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This project aims to bring an affordable heads up display system into ANY cockpit.

The focus is to improve traffic awareness and to reduce the amount of time pilots reference tablets or an EFB.

NOTE: This project relies on having a Stratux build with AHRS and GPS. A suitable build can be done for less than $150 (USD).

There are two versions that can be built:


Using the "HUDLY Classic" projector and a Raspberry Pi 3.

HUDLY Version

Estimated cost is $300

  • $40 for RaspberryPi 3
  • $215 for HUDLY projector
  • Fans, case, cables

Requires your aircraft to have a "12 Volt" cigarette power outlet.

Alternative, Less Expensive Version

A self contained system that uses a 3D printed case and teleprompter glass. This version can be built for the cost of a Raspberry Pi and the 3D print.

NOTE: This version does have visibility issues in daylight conditions. The HUDLY Version is fully daylight visible.

Teleprompter Glass Version In Flight

Estimated Cost is $140

  • $40 for a RaspberryPi 3
  • $45 for the LCD screen
  • $20 for Teleprompter Glass and shipping.
  • Cost of 3D printing the special case.
  • Cables

Can be powered by a USB powerbank or USB power.

In Flight Controls

You may use a number pad as input device. I used velcro to secure the number pad to my dashboard.

Key Action
Backspace Tell the Stratux that you are in a level position. Resets the AHRS to level.
+ Next view
- Previous view
= Toggle rendering debug information
Esc Send shutdown commands to both the HUD controller and the Stratux
q (Full keyboard only) Quit to the command line.


  • Traffic
  • AHRS
  • Traffic List (Text only)
  • Blank

Traffic View


Traffic View Screenshot

We are receiving ADS-B from three planes. N705JA is right ahead of us, bearing 90. We have a GPS track of 112 degrees. N705JA is 1.1 statute miles ahead, and 2,200 feet above. We have a large red target reticle that shows where N705JA actually is outside the cockpit.

Delta Airlines flight 39 is also ahead of us, and slightly to the right. It is further away, so the red reticle is smaller.

Note tha a red triangle points from the information card to the heading strip where the traffic is.

The closer the traffic, the larger the heading bug.

Traffic View Explanation

This shows you all of the traffic with reliable ADSB data.

NOTE: Any planes further than 10SM are excluded from this view.

It attempts to prioritize traffic by distance.

At the bottom is a heading strip. It shows you in text with a green background your GPS track and your gyro based direction. Combined they will give you an idea of any crab being maintained.

To the left and right are the headings 180 degrees from center.

Drawn above the heading strip are red "bugs". The larger the heading bug, the closer the traffic is.

Right above each bug is a yellow "card" that shows you information about that traffic.

At the top is the Tail Number, and if that is not available, a unique identifier that is broadcast. The next line is the bearing to the traffic. Below that is the distance to the target. Finally, the bottom line is the relative altitude in hundreds of feet. (+2 would be 200' above you.)

Cards are drawn so the furthest traffic is "at the bottom of the stack". This prioritizes the closest traffic to have all content readable.



Traffic View Screenshot

We have a GPS track of 153 degrees. We are in a 28 degree turn to the left. We are 15 degrees nose up. Our GPS altitude is 309' We are experiencing 0.8Gs, less than normal gravity.

Traffic Listing View


Traffic View Screenshot

This shows us at most the five closest planes.

NOTE: Any planes further than 10SM are excluded from this view.

Here we see N435SP is the closest plane, bearing 345, 1.0 statute miles away, and 1,300' above us.

N705JA is the second closest plane. It is Bearing 78, 1.2 statues miles away and 2,300 feet above us.


A blank screen so no information is displayed.

Parts List

All Builds

NOTE: This does not include a power source. You will need to supply ship power from a 5V USB port or from a battery.

Recommended HUDLY Build

  • HUDLY Classic
    • NOTE: You will most likely want to order the cigarette lighter powered version.
    • NOTE: You can order the iPhone or Android cable option based on your phone. It will not matter for the StratuxHud.
  • 12" HDMI Cable

3D Print Build

Install instructions

First Boot

  1. Flash the latest Raspbian to an SD card
  2. Plug in a keyboard and a monitor
  3. Plug in the power to the Pi.
  4. Press ctrl+alt+f1 to quit from the GUI to the desktop
  5. sudo raspi-config
  6. boot options -> desktop / cli -> "Console auto-login"
  7. "Advanced options" -> "Expand Filesystem"
  8. "OK"
  9. "Finish"
  10. "Yes"
  11. Wait for the reboot
  12. sudo raspi-config
  13. "Network options" -> "WiFi"
  14. Choose your country. Pressing "u" will take you to USA.
  15. Enter your network name and password.
  16. "Interfacing Options" -> "Enable SSH"
  17. "Localization" -> "Change Keyboard Layout" -> "Generic 104"
  18. "Other" -> "English US" -> "Default" -> "No compose" -> "Yes"
  19. "Finish"

Install Software

  1. Enter ping google.com. Press ctrl+c after a while. This will confirm that you have internet access. If you do not, then use rasp-config to re-enter your wi-fi
  2. pip install ws4py
  3. pip install pygame
  4. pip install requests
  5. cd ~
  6. git clone https://github.com/JohnMarzulli/StratuxHud.git
  7. sudo raspi-config
  8. Choose "WiFi" again, and enter stratux as the SSID. No password
  9. sudo vim /etc/wpa_supplicant/wpa_supplicant.conf
  10. Delete the section that contains your WiFi network, leaving the section that contains the Stratux network.
  11. More info on configuring Linux WiFi: https://www.raspberrypi.org/forums/viewtopic.php?t=160620
  12. Save and quit.
  13. Type "crontab -e"
  14. Select "Nano" (Option 1)
  15. Enter the following text at the bottom of the file:
@reboot sudo python /home/pi/StratuxHud/stratux_hud.py &
  1. Save and quit.

HUDLY Based Setup

  1. Install the HUDLY projector per the HUDLY directions. It is handy to have the projector turned on to help locate the glass.
  2. Plug in the HDMI cable between the HUDLY input box and the Raspberry Pi.
  3. Plug the number pad into the Raspberry Pi

Teleprompter Glass Based Setup

  1. Print the case.
  2. Attach the LCD screen to the "GPIO Board" of the Raspberry Pi
  3. Download the LCD drivers. https://s3.amazonaws.com/sunfounder/Raspberry/images/LCD-show.tar.gz
  4. Install the LCD driver per SunFounder's instructions. http://wiki.sunfounder.cc/index.php?title=5_Inch_LCD_Touch_Screen_Monitor_for_Raspberry_Pi
  5. Edit the StratuxHud config.json file so "flip_vertical" is True.
  6. Plug the number pad into the Raspberry Pi


Teleprompter sample: https://telepromptermirror.com/sample/

Acknowledgements And Credits

This project uses the Liberation family of fonts. They can be found at https://pagure.io/liberation-fonts/

The initial project was inspired by Kris Knigga's PyAhrs project https://github.com/kdknigga/pyahrs

The following components are used:

  • Python
  • PyGame
  • Ws4Py

... and of course Stratux


This project is covered by the GPL v3 license.

Please see LICENSE