Swiftlet Project page - Sonar for the visually impaired

Projects / Project Swiftlet

The project is getting too big for the index page, so I think it make sense to have its own page.

Sonar for Visually Impaired - Theory, background material, licenses and other boring stuff.

There are lots of material from various of my project logs, but they don't exactly fit the blog model.  I'll try to group the scattered parts into similar topics when possible.  Please bear with me.  Sadly this project is incomplete due to lack of time for the contest and outside funding, but I have a lot of results to share.

Project github: https://github.com/FPGA-Computer/Swiftlet

Design stage

• 1. Ultrasonic sensors part 1 background material
  2. Ultrasonic module teardown part 1
  3. Ultrasonic module reverse engineered
  4. Ultrasoni module customization ideas
  5. Ultrasonic circuit design
• 1. Microcontroller
  2. Making the Teensy LC in my own image
• MEMS is the word
• Haptic motor
• Battery info
• Power supply design
• PCB Design
• Misc components selection
• RTOS bringup
• Audio ideas/research
• User interface ideas
• Random thoughts
• PCB ordering - adventure in shipping - Canada Post decided to downgrade theri tracking systems.

Project bringup

• PCB populating and basic sanity
• Sonar firmware
• Digital rangefinder
• Noisy Cricket - Source of low frequency noise found - Boost converter PFM. Need PWM version
• Audio playback

Project status

• Progress report semifinal
  Sadly this is where the project ended.  Out of time for the contest, didn't win anything.  Everything so far was funded out of my own pocket.  Went into some major issue with I2S playback for the ASRm chip I have chosen.  There were no open source at the time that support what I wanted to do.