# The Spark Gap - Episode 38

- Show: [The Spark Gap](https://hardwarepodcasts.com/podcast/the-spark-gap)
- Published: 2015-07-29
- Length: 1h 07m
- Page: https://hardwarepodcasts.com/podcast/the-spark-gap/2015-07-29-the-spark-gap-episode-38
- Listen: https://thesparkgap.net/the-spark-gap-episode-38

## Summary

Hosts Carl and Corey discuss the Maxim DS2413 one-wire GPIO expander and the Maxim MAX3421E USB peripheral host controller, analyzing their specific use cases and limitations in embedded design. They then detail their podcasting setup, explaining their transition from a Guitar Hero USB microphone to Rode Procaster XLR microphones and a Focusrite Saffire Pro 24 audio interface to achieve multi-track recording. Finally, they share technical gripes regarding SPI bus mode inconsistencies and a Rigol DP832 power supply that failed by outputting 48 volts after a short circuit.

## Chapters

- [1:09](https://hardwarepodcasts.com/podcast/the-spark-gap/2015-07-29-the-spark-gap-episode-38#t=69) Introduction: Maxim DS2413 One-Wire GPIO Expander
- [13:09](https://hardwarepodcasts.com/podcast/the-spark-gap/2015-07-29-the-spark-gap-episode-38#t=789) Maxim MAX3421E USB Peripheral Host Controller
- [24:00](https://hardwarepodcasts.com/podcast/the-spark-gap/2015-07-29-the-spark-gap-episode-38#t=1440) Podcasting Gear: Microphones and Audio Interfaces
- [50:11](https://hardwarepodcasts.com/podcast/the-spark-gap/2015-07-29-the-spark-gap-episode-38#t=3011) Gripe: SPI Bus Mode Inconsistencies
- [56:41](https://hardwarepodcasts.com/podcast/the-spark-gap/2015-07-29-the-spark-gap-episode-38#t=3401) Gripe: Rigol DP832 Power Supply Failure Mode

## Topics

- [Microcontrollers & dev platforms](https://hardwarepodcasts.com/topic/microcontrollers-and-platforms)
- [Embedded firmware](https://hardwarepodcasts.com/topic/embedded-firmware)
- [Creator business](https://hardwarepodcasts.com/topic/creator-business)
- [Debugging & failure analysis](https://hardwarepodcasts.com/topic/debugging-and-failure-analysis)

## Most relevant to

makers and hobbyists

## Mentioned

- Maxim (company)
- DS2413 (chip)
- MAX3421E (chip)
- Rode Procaster (product)
- Focusrite Saffire Pro 24 (product)
- Rigol DP832 (product)

## Related episodes from other shows

- [Why isn't this working?](https://hardwarepodcasts.com/podcast/the-amp-hour/2020-02-14-why-isnt-this-working) (The Amp Hour)
- [328: Debugging Like a Monkey](https://hardwarepodcasts.com/podcast/embedded-fm/2020-04-23-328-debugging-like-a-monkey) (Embedded.fm)
- [381: Mass Sponge Migration](https://hardwarepodcasts.com/podcast/embedded-fm/2021-07-22-381-mass-sponge-migration) (Embedded.fm)
- [167: All Aliens Are Shiny](https://hardwarepodcasts.com/podcast/embedded-fm/2016-09-07-167-all-aliens-are-shiny) (Embedded.fm)
- [197: Smell the Transistor](https://hardwarepodcasts.com/podcast/embedded-fm/2017-04-26-197-smell-the-transistor) (Embedded.fm)

## Citing this page

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