Ep 373: GPS, Danger In Space, and Robby the Robot

Hackaday Podcast · 12 Jun 2026 · 53m · Episode 373

What this episode covers

Hosts Elliot Williams and Jenny List discuss Stephen Murdoch's research revealing that GPS satellites have been broadcasting secret, encrypted messages in the 'special messages' field of subframe 4 for decades, effectively acting as a modern numbers station. They then cover several hardware hacks, including an ATtiny85 emulating an Intel 8080, techniques for embedding magnets in 3D prints, and the debunking of the myth that all modern cassette mechanisms are identical. The episode concludes with home automation projects integrating linear tracking turntables and car diagnostics, and a 3D-printed Robbie the Robot costume.

Other shows on the same ground, closest first.

  • The Amp Hour · 1h 06m

    Space Age Bluetooth with Alex Haro

    Alex Haro, co-founder and CEO of Hubble, explains how his company has built a global tracking network using standard Bluetooth chips communicating directly with low-Earth orbit satellites. Haro details the technical innovation of using digital beamforming and custom waveforms to receive weak 2.4 GHz signals from space, allowing devices to function without GPS or cellular modems. The episode covers Hubble's hybrid terrestrial-satellite architecture, which leverages existing gateways and smartphone apps to provide enterprise-grade, real-time asset tracking and sensor data globally.

  • Embedded.fm · 1h 06m

    498: To Consume Stickers

    Hosts Elecia White and Christopher White discuss personal projects, including Christopher building a high-frequency GPS logger for a radio-controlled airplane using an ESP32 and Arduino, and Elecia’s journaling habit. They also cover listener questions on breaking into embedded software, the necessity of personal projects for engineers, and strategies for preventing burnout. The episode concludes with a technical discussion on designing event-driven serial communication stacks for bare-metal and RTOS environments.

  • Embedded.fm · 57m

    117: In as Much as Which

    Hosts Elecia White and Christopher White discuss listener emails covering Bluetooth 4.2 security, the definition of masked ROM, and the use of the volatile keyword in C. They review Elecia's work on precision mice feeders and bike lights, and detail their disassembly of BB-8 robots for competitive analysis of their BLE and inertial sensors. The episode concludes with commentary on Amazon's work culture and drone regulations.

  • The Amp Hour · 1h 05m

    Optimization Beast

    Hosts Dave Jones and Chris Gammell discuss a sophisticated impersonation scam targeting Dave, the passing of analog legend Barry Gilbert, and the logistics of moving labs. They announce KiCon 2020 at CERN, analyze the Starlink satellite network's latency and orbital debris issues, and review the Fairchild FSBB20 IGBT module, detailing its unique staggered pin package for high-voltage isolation. The episode concludes with a discussion on engineering productivity, task switching, and firmware debugging challenges.

  • Unnamed Reverse Engineering Podcast · 1h 40m

    053 - It's Hammer Time!

    Hash, a reverse engineer known for smart meter hacking, discusses his journey from self-taught electronics hobbyist to analyzing critical infrastructure. He details his reverse engineering of the Neato XV-11 robot vacuum's LIDAR to win a bounty, and his current work using Software Defined Radios (SDRs) like the HackRF and Yardstick One to analyze Landis+Gyr smart meters. Hash explains how he bypassed frequency hopping by transmitting on all channels simultaneously and highlights the security risks of these devices, including data leakage from decommissioned hardware found on eBay.

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