# Ep 031: Holonomic Drives, Badges of DEF CON, We Don't Do On-Chip Debugging, and Manufacturing Snafus

- Show: [Hackaday Podcast](https://hardwarepodcasts.com/podcast/hackaday-podcast)
- Published: 2019-08-16
- Length: 38m
- Page: https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-08-16-ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manuf
- Listen: https://hackaday.libsyn.com/ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manufacturing-snafus

## Summary

Hosts Mike Szczys and Kerry Scharfglass record from DEF CON, discussing Kerry's small-scale holonomic drive robot project and the complex manufacturing of the Car Hacking Village's SUV-shaped badge. They debate the merits of on-chip debugging versus print-based debugging in embedded systems, with Kerry advocating for unit testing with Valgrind on desktop builds. The episode concludes with interviews about manufacturing snafus, including a badge maker struck by lightning during assembly and another delayed by a contract manufacturer ordering the wrong microcontrollers.

## Chapters

- [0:01](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-08-16-ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manuf#t=1) Introduction and Holonomic Drive Robot Project
- [7:43](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-08-16-ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manuf#t=463) DEF CON Badges: Car Hacking Village SUV and Queercon
- [12:43](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-08-16-ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manuf#t=763) Embedded Engineering Career Path and On-Chip Debugging
- [19:19](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-08-16-ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manuf#t=1159) Dynamic Memory Allocation, malloc/free, and Valgrind
- [24:57](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-08-16-ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manuf#t=1497) Teensy 4.0, Edge Computing, and Low-Power Cellular
- [28:54](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-08-16-ep-031-holonomic-drives-badges-of-def-con-we-dont-do-on-chip-debugging-and-manuf#t=1734) Manufacturing Snafus: Lightning Strike and Wrong Parts

## Topics

- [Embedded firmware](https://hardwarepodcasts.com/topic/embedded-firmware)
- [Manufacturing partners & offshoring](https://hardwarepodcasts.com/topic/manufacturing-partners)
- [Microcontrollers & dev platforms](https://hardwarepodcasts.com/topic/microcontrollers-and-platforms)
- [Robotics & autonomy](https://hardwarepodcasts.com/topic/robotics-and-autonomy)
- [Test & measurement](https://hardwarepodcasts.com/topic/test-and-measurement)

## Most relevant to

makers and hobbyists

## Mentioned

- DEF CON (other)
- Supercon (other)
- Teensy 4.0 (chip)
- ESP32 (chip)
- Kendite K210 (chip)
- Valgrind (tool)
- GDB (tool)
- OpenOCD (tool)
- Bus Pirate (product)
- Ozobot (product)
- ST (company)
- Seed (company)

## Related episodes from other shows

- [387: Bucket of Spiders](https://hardwarepodcasts.com/podcast/embedded-fm/2021-09-23-387-bucket-of-spiders) (Embedded.fm)
- [191: What, Yogurt!?!](https://hardwarepodcasts.com/podcast/embedded-fm/2017-03-15-191-what-yogurt) (Embedded.fm)
- [Debugger vs Printeffer](https://hardwarepodcasts.com/podcast/the-amp-hour/2018-01-29-debugger-vs-printeffer) (The Amp Hour)
- [144: Asking For Clippy](https://hardwarepodcasts.com/podcast/embedded-fm/2016-03-23-144-asking-for-clippy) (Embedded.fm)
- [Photon Rich, Cash Poor](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-10-14-photon-rich-cash-poor) (The Amp Hour)

## Citing this page

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