# Ep078: Happy B-Day MP3, Eavesdrop on a Mars Probe, Shadowcasting 7-Segments, & a Spicy Commodore 64

- Show: [Hackaday Podcast](https://hardwarepodcasts.com/podcast/hackaday-podcast)
- Published: 2020-07-31
- Length: 57m
- Page: https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy
- Listen: https://hackaday.libsyn.com/ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy-commodore-64

## Summary

Hackaday editors Mike Szczys and Elliot Williams discuss a variety of hardware hacks, including decoding telemetry from the Tianwen-1 Mars probe, a wireless SD card reader using an ESP8266, and a plasma cutter collision detection system based on exact constraint design. They also review a mechanical shadow-casting 7-segment display, a Commodore 64 used to control a meat smoker, and a 4-axis stencil printer for PCBs. The episode concludes with a retrospective on the 25th anniversary of the MP3 format and a discussion on SpaceX's Falcon 9 rapid reflight records.

## Chapters

- [0:01](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=1) Introduction and DEF CON Badge Puzzle
- [4:55](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=295) Decoding Tianwen-1 Mars Probe Telemetry
- [10:42](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=642) ESP8266 Wireless SD Card Reader and Kinematic Mounts
- [20:13](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=1213) Mechanical Shadow-Casting 7-Segment Display
- [25:30](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=1530) Commodore 64 Meat Smoker and PCB Stencil Printer
- [33:05](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=1985) Quick Hacks: Color TV, PhidoCad J, and Splat 2308
- [37:55](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=2275) SpaceX Falcon 9 Rapid Reflight Records
- [46:42](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-31-ep078-happy-b-day-mp3-eavesdrop-on-a-mars-probe-shadowcasting-7-segments-a-spicy#t=2802) 25th Anniversary of the MP3 Format

## Topics

- [Embedded firmware](https://hardwarepodcasts.com/topic/embedded-firmware)
- [Mechanical engineering](https://hardwarepodcasts.com/topic/mechanical-engineering)
- [Chips, FPGAs & semiconductors](https://hardwarepodcasts.com/topic/chips-and-fpgas)
- [AI & machine learning](https://hardwarepodcasts.com/topic/ai-and-machine-learning)
- [Energy & climate tech](https://hardwarepodcasts.com/topic/energy-and-climate-tech)

## Most relevant to

makers and hobbyists

## Mentioned

- Tianwen-1 (product)
- ESP8266 (chip)
- Commodore 64 (product)
- Falcon 9 (product)
- MP3 (other)
- Fraunhofer Institute (company)
- SpaceX (company)
- NASA (company)

## Related episodes from other shows

- [Space Difficulties and Lost Heroes - Wanzing Workshop Whemmle](https://hardwarepodcasts.com/podcast/the-amp-hour/2014-11-06-space-difficulties-and-lost-heroes-wanzing-workshop-whemmle) (The Amp Hour)
- [73: That's a Waste of Bits](https://hardwarepodcasts.com/podcast/embedded-fm/2014-10-22-73-thats-a-waste-of-bits) (Embedded.fm)
- [1 Inch HDMI Second Screen, Retro Wall Art, and more!](https://hardwarepodcasts.com/podcast/the-electromaker-show/2022-04-06-1-inch-hdmi-second-screen-retro-wall-art-and-more) (The Electromaker Show)
- [233: Always the Wrong Way](https://hardwarepodcasts.com/podcast/embedded-fm/2018-02-09-233-always-the-wrong-way) (Embedded.fm)
- [Multicopter, DIY drones & Tektronix - Zappy Zendik Zoilism](https://hardwarepodcasts.com/podcast/the-amp-hour/2011-08-30-multicopter-diy-drones-tektronix-zappy-zendik-zoilism) (The Amp Hour)

## Citing this page

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