# Ep 127: Whippletree Clamps, Sniffing Your Stomach Radio, Multimeter Hum Fix, and C64 Demo; No C64

- Show: [Hackaday Podcast](https://hardwarepodcasts.com/podcast/hackaday-podcast)
- Published: 2021-07-16
- Length: 53m
- Episode: 127
- Page: https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64
- Listen: https://hackaday.libsyn.com/ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64-demo-no-c64

## Summary

Hackaday editors Mike Szczys and Elliot Williams review several hardware hacks, including a custom NFC antenna design by RevK using the PN532 chip, a 3D-printed whippletree clamp by Chris Borga, and a medical device sniffing project by James Wu. They also discuss a multimeter repair involving a crystal frequency mismatch and a Commodore 64 demo running on a floppy drive. The episode concludes with a discussion on the Audacity ownership saga involving Muse Group and grid restart technology.

## Chapters

- [0:02](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=2) Introduction: NTSC Broadcast End and Hackaday Prize
- [6:29](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=389) Custom NFC Antenna Design by RevK
- [9:51](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=591) 3D Printed Whippletree Clamp by Chris Borga
- [15:43](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=943) Sniffing Stomach Radio Signals by James Wu
- [20:40](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=1240) Multimeter Hum Fix: Crystal Frequency Mismatch
- [25:28](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=1528) Raspberry Pi Stereo Microscope Setup
- [29:46](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=1786) C64 Demo Running on Floppy Drive
- [37:23](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=2243) Grid Black Start and Exciter Circuits
- [40:42](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64#t=2442) Audacity Ownership Saga: Muse Group and Licensing

## Topics

- [PCB design & layout](https://hardwarepodcasts.com/topic/pcb-design)
- [Prototyping & iteration](https://hardwarepodcasts.com/topic/prototyping)
- [Wireless & RF](https://hardwarepodcasts.com/topic/wireless-and-rf)
- [Debugging & failure analysis](https://hardwarepodcasts.com/topic/debugging-and-failure-analysis)
- [Microcontrollers & dev platforms](https://hardwarepodcasts.com/topic/microcontrollers-and-platforms)
- [Chips, FPGAs & semiconductors](https://hardwarepodcasts.com/topic/chips-and-fpgas)
- [Energy & climate tech](https://hardwarepodcasts.com/topic/energy-and-climate-tech)
- [Intellectual property](https://hardwarepodcasts.com/topic/intellectual-property)

## Most relevant to

makers and hobbyists

## Mentioned

- RevK (other)
- PN532 (chip)
- Chris Borga (other)
- James Wu (other)
- RTL-SDR (tool)
- RTL 433 (tool)
- Giga Devices (company)
- HY3131 (chip)
- Raspberry Pi (other)
- Stereo Pi (product)
- Commodore 64 (product)
- Muse Group (company)
- Audacity (product)
- Tenacity (product)

## Related episodes from other shows

- [Clap on, clap off, lights flicker](https://hardwarepodcasts.com/podcast/the-amp-hour/2025-03-12-clap-on-clap-off-lights-flicker) (The Amp Hour)
- [Cassette decks have browsers?](https://hardwarepodcasts.com/podcast/the-amp-hour/2021-05-24-cassette-decks-have-browsers) (The Amp Hour)
- [Call In Show #4](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4) (The Amp Hour)
- [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)
- [033 - All Over the Place](https://hardwarepodcasts.com/podcast/unnamed-reverse-engineering-podcast/2020-04-27-033-all-over-the-place) (Unnamed Reverse Engineering Podcast)

## Citing this page

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