Hackaday Podcast 121: Crazy Bikes, DIY Flip Dots, EV Mountain Climbing, and Trippy Tripterons

Hackaday editors Mike Szczys and Elliot Williams discuss a great week of hardware hacks. Two delightful mechanical hacks focus on bicycles: one that puts a differential on the front fork, and the other a flywheel between the knees. Elliot was finally impressed by something involving AI — a machine-learning guitar pedal. You’ve heard of a delta bot? The tripteron is similar but with a single rail for the three arms. After a look at flip dots, tiny robots, and solar air planes we close the show geeking out about racing electric vehicles up a hill and stories of the hardware that has made closed captions possible.

Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Direct download (55 MB or so.)

Places to follow Hackaday podcasts:

• Google Podcasts
• iTunes
• Spotify
• Stitcher
• RSS

Episode 121 Show Notes:

What’s that Sound?

Tell us your answer for this week’s “What’s that sound?”. Next week on the show we’ll randomly draw one name from the correct answers to win a limited-edition Hackaday Podcast T-shirt. (How limited?  So far, limited to three. But I’m sure we’ll make another in a couple weeks.)

New This Week:

• New Part Day: RP2040 Chips In Single Unit Quantities

Interesting Hacks of the Week:

• 3D Printed Flip Dots
  • GitHub – larrybuilds/flip_dot_display: A modular 3D printable flip dot display
• Trippy Tripteron Kinematics Brainteaser
  • RepRap DuoRail (More of a Shelbyville Idea) – Two Rail Tripteron – YouTube
  • Dawn Of The Tripteron 3D Printer
• Tiny PCB Motor Robot Is Making Its First Wobbly Moves
  • Living Robots: Revisiting BEAM
• Neural Networks Emulate Any Guitar Pedal For $120
  • Elk Audio OS · GitHub
• Crazy Bikes:
  • All-Wheel Drive Bicycle Using Hand Drill Parts
  • Bicycle Flywheel Stores A Bit Of Energy, Not Much
• Solar Plane Is Like One Big Flying Solar Panel
  • Tacking Against The Sun: Flying A Batteryless Solar RC Plane Is Almost Like Sailing
  • Solarflieger
  • AMAZING RC SOLAR PLANE WITHOUT BATTERY SELFMADE FLIGHT DEMONSTRATION – YouTube

Quick Hacks:

• Mike’s Picks
  • Retrotechtacular: The Drama Of Metal Forming
  • Reviving Old Recipe For Faraday Wax Keeps Vacuum Experiments Going
  • This ESP32 Bluetooth Page Turner Can’t Get Any Easier
• Elliot’s Picks:
  • A Look Back On The Oroville Dam With Practical Engineering
  • Speech Recognition On An Arduino Nano?
  • Samsung Releases Minimum Viable Galaxy Upcycling

Can’t-Miss Articles:

• Electric Vehicles Do Battle On Pikes Peak
• History Of Closed Captions: Entering The Digital Era