# Ep 149: Ballerina Bot Balances, Flexures Track Cat Food, PCB Goes Under the Knife, and an ATtiny Does the 555

- Show: [Hackaday Podcast](https://hardwarepodcasts.com/podcast/hackaday-podcast)
- Published: 2021-12-17
- Length: 54m
- Episode: 149
- Page: https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a
- Listen: https://hackaday.libsyn.com/ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-and-an-attiny-does-the-555

## Summary

Hackaday editors Elliot Williams and Dan Maloney review a week of hardware hacks, including a self-balancing robot with arms by Hans Jurgen, digital painting on an iPad using frustrated total internal reflection by Richard Green, and PCB microsurgery by Andrew Zonenberg. They also discuss an ATtiny85 emulating a 555 timer, a flexure-based cat food tracker by Amy, and a VGA adapter by Nick Build. The episode concludes with reviews of articles on consciousness research and vintage 8mm cameras.

## Chapters

- [0:00](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=0) Introduction and Log4j/James Webb News
- [5:37](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=337) Self-Balancing Ballerina Robot by Hans Jurgen
- [9:56](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=596) Digital Painting with iPad and Fresnel Prism
- [14:33](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=873) PCB Microsurgery by Andrew Zonenberg
- [19:37](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=1177) ATtiny85 Emulating a 555 Timer
- [23:13](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=1393) Flexure Cat Food Tracker and CNC Review
- [30:17](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=1817) VGA Adapter and Quick Hacks
- [38:24](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-12-17-ep-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-a#t=2304) Can't Miss Articles: Consciousness and 8mm Cameras

## Topics

- [Robotics & autonomy](https://hardwarepodcasts.com/topic/robotics-and-autonomy)
- [Industrial & consumer product design](https://hardwarepodcasts.com/topic/industrial-design)
- [Debugging & failure analysis](https://hardwarepodcasts.com/topic/debugging-and-failure-analysis)
- [Microcontrollers & dev platforms](https://hardwarepodcasts.com/topic/microcontrollers-and-platforms)
- [Fabrication & craft](https://hardwarepodcasts.com/topic/fabrication-and-craft)
- [PCB design & layout](https://hardwarepodcasts.com/topic/pcb-design)

## Most relevant to

makers and hobbyists

## Mentioned

- Hans Jurgen (other)
- Richard Green (other)
- Andrew Zonenberg (other)
- Femptodino (company)
- ATtiny85 (chip)
- 555 (chip)
- Amy (other)
- Nick Build (other)
- ESP32 (chip)
- Nintendo Wii (product)
- iPad (product)
- Lightstrokes (product)
- James Webb Space Telescope (product)
- Log4j (other)
- Fresnel prism (tool)
- Delrin (material)
- 7400 (chip)
- Raspberry Pi (product)
- Fuji P300 (product)

## Related episodes from other shows

- [Raspberry Pi 500, Robot Roadies, Huge 3d Printers and Car Hacking!](https://hardwarepodcasts.com/podcast/the-electromaker-show/2023-11-26-raspberry-pi-500-robot-roadies-huge-3d-printers-and-car-hacking) (The Electromaker Show)
- [Hacked E-Paper Price Tags, Raspberry Pi MCU Dev HAT, Arduino Robot Arm, and More!](https://hardwarepodcasts.com/podcast/the-electromaker-show/2023-01-18-hacked-e-paper-price-tags-raspberry-pi-mcu-dev-hat-arduino-robot-arm-and-more) (The Electromaker Show)
- [Chaffered Chocolate Coemption](https://hardwarepodcasts.com/podcast/the-amp-hour/2012-04-09-chaffered-chocolate-coemption) (The Amp Hour)
- [Eurocircuits PCB Contest Winners, Maker Faire Rome 2022, LattePanda Giveaway!](https://hardwarepodcasts.com/podcast/the-electromaker-show/2022-10-21-eurocircuits-pcb-contest-winners-maker-faire-rome-2022-lattepanda-giveaway) (The Electromaker Show)
- [89: I Have New Batteries](https://hardwarepodcasts.com/podcast/embedded-fm/2015-02-18-89-i-have-new-batteries) (Embedded.fm)

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