# The Spark Gap - Episode 53

- Show: [The Spark Gap](https://hardwarepodcasts.com/podcast/the-spark-gap)
- Published: 2018-01-31
- Length: 54m
- Page: https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53
- Listen: https://thesparkgap.net/the-spark-gap-episode-53

## Summary

Corey discusses his ongoing ping pong scoreboard project, which uses discrete logic chips like the CD4026 and struggles with CD4518 counters due to clock rise time violations at 12V. He details his debugging process involving breadboards, hex buffers, and the decision to design a PCB using Fritzing. Meanwhile, Karl introduces the STM32F723ZE microcontroller, highlighting its built-in USB High-Speed PHY, but warns of software library incompatibilities, and outlines his own project: a custom CNC Raspberry Pi hat integrating an Arduino and RS485 communication for a variable frequency drive.

## Chapters

- [0:00](https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53#t=0) Introduction: The Spark Gap Podcast
- [2:04](https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53#t=124) Corey's Part of the Podcast: ST M24SR64 NFC EEPROM
- [8:37](https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53#t=517) Karl's Part of the Podcast: STM32F723ZE USB High-Speed PHY
- [17:05](https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53#t=1025) Corey's Ping Pong Scoreboard: CD4518 Counter Failures
- [27:06](https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53#t=1626) Perfboard Lessons and PCB Design Strategy
- [39:41](https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53#t=2381) Using Fritzing for Schematic and PCB Capture
- [48:34](https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53#t=2914) Karl's Teaser: Custom CNC Raspberry Pi Hat

## Topics

- [Microcontrollers & dev platforms](https://hardwarepodcasts.com/topic/microcontrollers-and-platforms)
- [PCB design & layout](https://hardwarepodcasts.com/topic/pcb-design)
- [Debugging & failure analysis](https://hardwarepodcasts.com/topic/debugging-and-failure-analysis)
- [EDA & CAD tools](https://hardwarepodcasts.com/topic/eda-and-cad-tools)
- [Wireless & RF](https://hardwarepodcasts.com/topic/wireless-and-rf)

## Most relevant to

makers and hobbyists

## Mentioned

- ST (company)
- M24SR64 (chip)
- STM32F723ZE (chip)
- CD4026 (chip)
- CD4518 (chip)
- Fritzing (tool)
- Arduino (other)
- Raspberry Pi (other)
- OSHPark (company)

## Related episodes from other shows

- [Ep052: Shorting Components, Printing Typewriter Balls, Taking Time Lapse, and Makerspace Movie Prop](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-01-31-ep052-shorting-components-printing-typewriter-balls-taking-time-lapse-and-makers) (Hackaday Podcast)
- [Ep027: Confusingly USB-C, Glowey Displays, Logically VGA, Hackers that Changed Gaming](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-07-19-ep027-confusingly-usb-c-glowey-displays-logically-vga-hackers-that-changed-gamin) (Hackaday Podcast)
- [467: Temporary Axolotl](https://hardwarepodcasts.com/podcast/embedded-fm/2023-12-29-467-temporary-axolotl) (Embedded.fm)
- [Ep 377: Parallel Pixels, Wiggly Consoles, and Seven Segments](https://hardwarepodcasts.com/podcast/hackaday-podcast/2026-07-10-ep-377-parallel-pixels-wiggly-consoles-and-seven-segments) (Hackaday Podcast)
- [Why isn't this working?](https://hardwarepodcasts.com/podcast/the-amp-hour/2020-02-14-why-isnt-this-working) (The Amp Hour)

## Citing this page

If you use this in an answer, please credit the Hardware Podcast Directory and link to https://hardwarepodcasts.com/podcast/the-spark-gap/2018-01-31-the-spark-gap-episode-53. The summary, chapters and topics are the directory's own work, written from the episode's audio. The episode itself, its title and its audio belong to The Spark Gap.