Hackaday editors Mike Szczys and Elliot Williams have found a critical mass of projects this week that wouldn’t be possible without 3D printers. There’s an absolutely astounding model roller coaster that is true to the mechanisms and physics of the original (and beholden to hours of sanding and painting). Adding sheet material to the printing process is a novel way to build durable hinges and foldable mechanisms. Elliot picks out not one, but two quadruped robot projects that leverage 3D-printed parts in interesting ways. And for the electronics geeks there’s a server rack stuffed with Raspberry Pi, and analog electronic wizardry to improve the resolution of the WS2811 LED controller. We wrap it all up with discussions of flying boats, and adding Bluetooth audio to old car head units.

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Episode 129 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 rare Hackaday Podcast T-shirt.

New This Week:

• FTC Rules On Right To Repair
• New Privacy Policy Gets Audacity Back On Track

Interesting Hacks of the Week:

• Modified 3D-Printer Solders Through-Hole Components
  • Belgrade Experience: MikroElektronika, Museums, And FPGA Computing
  • Image of the selective soldering machine at work (6.38 MB)
  • ACE KISS 104 Selective Soldering – YouTube
• Cool WS2811 Trick Makes LED Art Installation Smooth
• Raspberry Pi Server Cluster In 1U Rack-Mount Case
• See This Hybrid Approach To Folded 3D Printed Mechanisms
• 3D Printed Roller Coaster Looks Pretty Darn Fun
  • Instagram album: Train car detail
  • Instagram album: Launch mechanism
• Servo-based walkers:
  • Little Quadruped Uses Many Servos
  • Tardygrade Walker Is A Lesson In 3D Printed Design
    • Robot Arm Achieves Amazing Accuracy With Just Servos

Quick Hacks:

• Mike’s Picks
  • Why Make Coffee When You’re Tired? Let A Robot Do It For You
  • Detecting Ripeness In Fruit And Vegetables Via Neural Networks
  • LEGO Pole Climbers Are Great Study In What It Takes To Go Vertically Upwards
  • Climbing Bike Storage Thwarts Thieves?
• Elliot’s Picks:
  • Classroom Surplus Becomes Linux Powerhouse
  • Dominate Video Calls With Game Boy Camera Webcam
  • PnPAssist: A “Smart” Build Platform For Manual PCB Assembly

Can’t-Miss Articles:

• Who Flew Across The Atlantic First? The Airborne Boats Of 1919
• How To Modify Your Car Stereo For Bluetooth Or Aux-In