# Ep062: Tripping Batteries, Ventilator Design, Stinky Prints, and Simon Says Servos

- Show: [Hackaday Podcast](https://hardwarepodcasts.com/podcast/hackaday-podcast)
- Published: 2020-04-10
- Length: 54m
- Page: https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos
- Listen: https://hackaday.libsyn.com/ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos

## Summary

Hackaday editors Mike Szczys and Elliot Williams discuss the engineering challenges of DIY ventilator designs, noting their lack of pressure feedback and safety features compared to medical-grade units. They explore a hack by Oliver that uses the DW01 battery protection chip to remotely shut off lithium-ion cells, and Peter's Big Lab's 'Simon Says' trainable servo project which records analog positions for playback. The episode also covers a research paper comparing consumer and research-grade heart rate monitors, a guide to J-Tag reverse engineering, and safety measures for smelly resin 3D printing.

## Chapters

- [0:03](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=3) Introduction and Telepresence Robots
- [6:43](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=403) DIY Ventilator Engineering Challenges
- [14:23](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=863) Abusing DW01 Battery Protection Circuits
- [19:33](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=1173) Trainable Servos and Closed-Loop Control
- [23:24](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=1404) Consumer vs. Research Heart Rate Monitor Accuracy
- [30:31](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=1831) J-Tag Reverse Engineering Guide
- [33:56](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=2036) Open Source Tamagotchi and Industrial Robot Hacks
- [41:41](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-10-ep062-tripping-batteries-ventilator-design-stinky-prints-and-simon-says-servos#t=2501) Resin Printing Safety and Star Tracking Navigation

## Topics

- [Batteries & low-power design](https://hardwarepodcasts.com/topic/batteries-and-low-power)
- [Medical & health devices](https://hardwarepodcasts.com/topic/medical-devices)
- [Microcontrollers & dev platforms](https://hardwarepodcasts.com/topic/microcontrollers-and-platforms)
- [Sensors & measurement in products](https://hardwarepodcasts.com/topic/sensors)
- [Debugging & failure analysis](https://hardwarepodcasts.com/topic/debugging-and-failure-analysis)
- [Materials & manufacturing processes](https://hardwarepodcasts.com/topic/materials-and-processes)

## Most relevant to

makers and hobbyists

## Mentioned

- DW01 (chip)
- Apple Watch (product)
- Xiaomi Band 3 (product)
- OpenOCD (tool)
- UrJTAG (tool)
- Raspberry Pi (product)
- Prusa (company)
- Form Labs (company)

## Related episodes from other shows

- [304: ADC Channel Six](https://hardwarepodcasts.com/podcast/embedded-fm/2019-09-26-304-adc-channel-six) (Embedded.fm)
- [The Spark Gap - Episode 44](https://hardwarepodcasts.com/podcast/the-spark-gap/2015-12-25-the-spark-gap-episode-44) (The Spark Gap)
- [Our First Call In Show](https://hardwarepodcasts.com/podcast/the-amp-hour/2015-11-06-our-first-call-in-show) (The Amp Hour)
- [It Works With Option Number 5](https://hardwarepodcasts.com/podcast/the-amp-hour/2025-06-19-it-works-with-option-number-5) (The Amp Hour)
- [54: Oh! The Hugh Manatee](https://hardwarepodcasts.com/podcast/embedded-fm/2014-06-05-54-oh-the-hugh-manatee) (Embedded.fm)

## Citing this page

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