The Curious Engineer

All blogs / Ham radio / RF

absorptions

windytan.com

A blog about signals, programming, music, and other stuff.

Ham radio / RFAudio / hi-fiElectronicsEngineering blogs

’15’20’25
Posts
59 from 8 Jan 2012 to 16 Apr 2025
Posting
now and then
Kind
personal blog
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2025 1

  1. Passing planes and other whoosh sounds

2024 2

  1. Ultrasonic investigations in shopping centres
  2. Smoother sailing: Studying audio imperfections in Steamboat Willie

2023 1

  1. Using HDMI EMI for fast wireless data transfer

2021 2

  1. Spiral spectrograms and intonation illustrations
  2. Speech to birdsong conversion

2020 1

  1. Plotting patterns in music with a fantasy record player

2019 2

  1. Capturing PAL video with an SDR (and a few dead-ends)
  2. Beeps and melodies in two-way radio

2017 5

  1. Animated line drawings with OpenCV
  2. In pursuit of Otama's tone
  3. Descrambling split-band voice inversion with deinvert
  4. Gramophone audio from photograph, revisited
  5. Virtual music box

2016 2

  1. CTCSS fingerprinting: a method for transmitter identification
  2. Redsea 0.7, a lightweight RDS decoder

2015 6

  1. Pea whistle steganography
  2. The microphone bioamplifier
  3. Case study: low-frequency tinnitus with distortion
  4. Trackers leaking bank account data
  5. Receiving RDS with the RTL-SDR
  6. My chip collection

2014 6

  1. Visualizing hex dumps with Unicode emoji
  2. Mapping microwave relay links from video
  3. Headerless train announcements
  4. Time-coding audio files
  5. Mystery signal from a helicopter
  6. Misleading representations of discrete-time signals

2013 23

  1. Decoding radio-controlled bus stop displays
  2. Broadcast messages on the DARC side
  3. The burger pager
  4. LAN file transfer with netcat
  5. Squelch it out
  6. Reader challenge explained
  7. The flyback sonar
  8. Reader challenge: Obfuscated messages
  9. Descrambling the voice inversion scrambler
  10. A determined 'hacker' decrypts RDS-TMC
  11. Tomy Electronic PUCKMAN
  12. How I discovered RDS
  13. Portable TV, Raspberry-Pified
  14. Rendering PCM with simulated phosphor persistence
  15. Eavesdropping on a wireless keyboard
  16. RDS display on a Raspberry Pi
  17. Voice over laser
  18. The laser-equipped Lego train
  19. Case modding, the polish way
  20. The Atomic-Powered Robot
  21. The GSM buzz
  22. SSTV reception on Linux
  23. The infrared impulse

2012 8

  1. The sound of the dialup, pictured
  2. How I made my Ubuntu usable again
  3. Enchanting subcarriers on FM, part 2
  4. Enchanting subcarriers on FM
  5. Character recognition, the simple way
  6. Vintage bits on cassettes
  7. Summer fun: tinkering with a broken GPS
  8. Google Earth on 64-bit Linux