In this specially-numbered podcast episode that lines up quite nicely with our Retrocomputing Challenge, Elliot Williams and Kristina Panos met over surprisingly low latency and loud beverages to bring you the best of the previous week’s hacks.

But first, the news. German company Isar Aerospace can now claim that they’ve launched the first spacecraft into orbit from Europe. Be sure to check out the in-link, where we reported on the building of the spaceport.

In Hackaday news, the aforementioned Retrocomputing Contest had 64 entries at last check, which is just perfect for Episode 386. Will yours be the 65th?

Supercon Ten tickets are selling out, and per Elliot, the talks have been chosen, pending approval by each submitter.  Keep an eye on the blog for the official announcement!

After reviewing the news, Elliot reached into the ol’ Mailbag and found two missives, including another from [Vik Olliver] regarding the printing of LEGO. The other is from [Mendel Munkis], who has been enjoying Wikipedia offline since 2018, thanks to a 32-bit ARM9 processor. Then, it was on to the hacks.

Check out the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Download in lovely MP3.

Episode 386 Show Notes:

News:

• The First Spacecraft Launched To Orbit From Europe
• Announcing The 2026 Hackaday Retrocomputing Challenge
• Retro Computing Contest
• Wikipedia: Unusual articles

Mailbag:

• This week, we have a double feature!

Interesting Hacks of the Week:

• Making A Pole Balance Itself With Propellers
  • 3D-Printed Self-Balancing Robot Brings Control Theory To Life
• Free Your Rotary Telephone From Its Wire
  • • Simplify Your Life With This Pocket Rotary Cellphone
    • The Open Source Rotary Cell Phone, Two Years Later
    • Using Old Phones As An Intercom In Your VW Bus (or Anywhere Else)
    • Wikipedia: Intercept messages
    • This Is a Recording
• Printing Micron-Scale Benchies With Resin And Turmeric
  • GitHub – 0x23/MicroManipulatorStepper: A sub-micrometer 3D motion control plattform. · GitHub
• This Clavichord Is A Well-Tempered Project
• The Different Ways To Look At Negative Resistance
• There’s A Whole Computer Inside This Mouse

Quick Hacks:

• Elliot’s Picks:
  • If It’s Electronic Paper, Why Not Print To It?
  • 3D Printable Lenticular Indicators
  • The Helicopter With Radioactive Blades
• Kristina’s Picks:
  • A Split Keyboard Designed For Human Hands
  • Take Tool Photo, Generate Custom Gridfinity Bin
  • Anti-Doomscroll Tamagotchi Only Lives If You Do

Can’t-Miss Articles:

• Hackaday Europe 2026: Outdoors With Robots
• Hunting The Wild Vibrotruck

As the calendar turns a leaf into September, Elliot Williams is joined by Jenny List for our weekly look at all things Hackaday.

In the news, our retrocomputing competition is well under way, but there’s plenty of time to get an entry in if you’ve got a cool old-style project to show us. And then Elliot’s been chasing seismic surveyors in Munich, where they’re looking for geothermal energy.

In the stand-out hacks there’s a discussion of smoothing 3D prints using frickin’ lasers, the effect of unreasonably high RAM and storage prices on the single board computer ecosystem, and an unfortunate air conditioning system that’s tricked into believing it’s a hot day. Finally, we look in depth at PETG, and take a dive into reverse Polish notation.

Download your own personal version of the podcast right here.

Episode 384 Show Notes:

Mailbag:

In out mailbag this week we had [Kevin Opalka] asking about roadtrip hacks and [Matthew Rowberry] explaining that most versatile yet underrated prototyping medium: the humble Lego brick. Which in turn gives us the chance to mention Lego House: Right Next To Denmark’s Legoland, But Way Cooler, a trip we made back in 2019.

Got something to say? Send an e-mail or an audio clip to mailbag@hackaday.com.

News:

• Announcing The 2026 Hackaday Retrocomputing Challenge
• Seismic investigation for Munich’s geothermal project.

Interesting Hacks of the Week:

• Laser Your Way To Smoother FDM 3D Prints
  • Has FDM 3D Printing Hit Its Peak?
• Has the time of esoteric operating systems arrived?
  • Haiku OS Releases Beta 6
  • ReactOS Gets An Upgrade
  • Amiga-Inspired AROS Goes Bare Metal On Raspberry Pi
• Tricking An Air Conditioner Into Cooling
• Wikipedia On A Cheap Yellow Display
• HDMI For The Color Computer 2
• RAM And EMMC Prices Are So High, Pine64 Has Stopped Linux Device Production

Quick Hacks:

• Elliot’s Picks:
  • Doubling Thermal Printer Resolution By Wiggling
  • A Defrag Simulator In Your Browser
  • Reactive Heat And Wind Come To VR, Thanks To Smart Plugs
  • Get Your Monitor Transmitting VHF With A Browser Tool
• Jenny’s Picks:
  • Digital “Film” For Your Pi Camera
  • Giving The NES An Optical Data Storage Add-On
  • How A 1981 RAM Expansion Worked

Can’t-Miss Articles:

• PETG: The PLA Filament Alternative That Just Works
• “I’m Not Dead Yet!” Reverse Polish Notation Calculators You Can Still Buy
  • Teardown With A Twist: 1975 Sinclair Scientific Calculator
  • Reverse Polish Notation And Its Mildly Confusing Elegance

What did Hackaday editors Elliot Williams and Al Williams read in Hackaday last week? Probably everything, but you can tune in and hear about their favorites on this week’s podcast. They heard from lots of listeners this week, and also saw DIY projects running from a 3D-printed Stirling engine, to clogs, to LEDs.

There are some over-the-top hacks like a refit for a decades-old watch to do tap-to-pay and a — for lack of a better word — a record player that optically reads MOD files. Want to emulate an iPod? Talk to Eliza? Print a hand-operated rail car? Hackaday is the place to read about it all.

The can’t miss articles included a talk from Hackaday Europe about making magical PCBs and a not-so-brief history of space stations starting in the 1800s.

Check out the links if you want to follow along, and as always, tell us what you think about this episode in the comments!

Direct download in MP3 suitable for hand-decoding.

Episode 384 Show Notes:

Mailbag:

• [Joshua Wiebe] had questions about using MOSFETs to drive motors. The guys had their thoughts, but feel free to send in yours.
• [Jake Wachlin] wanted to talk about using AI in projects.
• [Caleb Butler] spammed us, but all in fun.
• [Alexander] wrote in to response to last week’s podcast talking about his experiece with an ultrasonic knife.

Got something to say? Send an e-mail or an audio clip to mailbag@hackaday.com.

News:

• Announcing The 2026 Hackaday Retrocomputing Challenge
  • Linux Fu: The Old School Terminal
• Supercon 2026!

Interesting Hacks of the Week:

• Thermoacoustic Stirling Engine Is Now Fully 3D Printable
  • Thermoacoustic engines paper (pdf)
  • Thermoacoustic Organ
  • A DIY Pulse Tube Cryocooler In The Quest For Home-Made Liquid Nitrogen
• Straight Talk On 3D Printing Footwear At Home
• The Shutter Makes This 3D Printed Camera Special
• Making LEDs In The Home Fab
• Encoding MOD Files Optically On Paper, Because Amiga’s Legacy Will Outlast M-Disks
• The Casio F-91W As A Contactless Payment Device.

Quick Hacks:

• Elliot’s Picks:
  • Making An LCD UI Look More Like Classic Indicator Lamps
  • Emulating The iPod
  • Quest VR Headset Becomes Unlocked Hardware
• Al’s Picks:
  • Artificial Intelligence As It Once Was
  • Neo-Cyclostyle: Automatic Document Copying Devices In 1890
  • 3D Printing A Railway Pump Car

Can’t-Miss Articles:

• Hackaday Europe 2026: PCBs With A Plot
• An Early History Of Space Stations: The Brick Moon Made Real
• An Early History Of Space Stations: Where’s My Wheel?

In this week’s episode, Hackaday Editors Elliot Williams and Tom Nardi start things off by getting excited about the recently announced 2026 Retrocomputing Challenge. From there the conversation will cover efforts to improve desktop 3D printing with lasers, an expensive grill with an ESP32 controller and an open source firmware, open source tools underground, and some impressive techniques to squeeze a bit more utility out of the common QR code.

You’ll also hear about turning PVC pipes into flat stock, old school Radio Shack electronic kits, and VR soldering demos. Stick around to the end of the episode learn about the latest developments in over-the-counter hearing aids and the 1-bit CPU that’s enjoying an unexpected fandom nearly 50 years after its release.

Check out the links if you want to follow along, and as always, tell us what you think about this episode in the comments!

Direct download in DRM-free MP3.

Episode 383 Show Notes:

Mailbag:

• Alexander wrote in praise of buying ultrasonic knife guts. Donald Papp wrote up his experience with a hacked dental tool a few years back. Now you can get it over the counter.
• Joey wrote in asking if we can add video/visuals to the Podcast. We complain about how difficult that would be.  :)
• Mailbag still needs intro/outro music. Anyone want to whip something up? Send it to mailbag@hackaday.com.

News:

• Announcing The 2026 Hackaday Retrocomputing Challenge
• Using The Famicom Network System In 2026

Interesting Hacks of the Week:

• Laser Layers For (Almost) Isotropicly Strong Prints
  • 3D Print Smoothing, With Lasers
  • More On Wave Overhangs For 3D Printing
• Reverse Engineered Grill Controller Gets Open Firmware
• Hackaday Europe 2026: Open Source Hardware Goes Underground, Literally
  • GitHub – furbrain/STIC · GitHub
• Building Custom Backyard Solar Lights
  • PVC Pipe Transformed Into Handy Tool Box
• Compress Links For Optimal QR Codes
  • http://ha.mr#2)22
  • Store Tunes On Paper And Stream Them Over LoRA
• Radio Shack Toy Returns To Life

Quick Hacks:

• Elliot’s Picks:
  • Joy-Cons Plus WiiMotes Make For Switch 2 Wii-Cons
  • So, You Want To Fix An Old Camera
  • Watch Soldering Up Close And From Any Angle, In VR
  • May This Balloon Banjo Resonate With You
• Tom’s Picks:
  • Snooping Flume Water Monitor Data On The Wire
  • Smarting Up A Doorbell With Zigbee
  • Scanning For Lifesigns With ESP32 And Raspberry Pi

Can’t-Miss Articles:

• Smartphones And The Next Generation Of Hearing Aids
• Hackaday Europe 2026: The 1-Bit CPU That Ran Factories
  • Building An Industrial Control Unit With An Industrial Control Unit
  • A one-bit processor explained: reverse-engineering the vintage MC14500B
  • WDR-1-Bit-Computer
  • Too Cool For 8-bit Retro? Try 1-bit Gaming