How Do The Normal People Survive?

It was one of those weeks last week at Hackaday’s home office. My mother-in-law handed me her favorite power bank and said “it’s not charging”. She had every expectation that I’ll open it up, desolder the weary pouch inside, scrounge a LiPo out of some corner of the basement, and have it back up and running before the weekend. And of course that’s what happened, although maybe it looks a little worse for wear because it was hard to open the sealed case without excessive force. Sorry about that!

Then on the weekend, I finally got fed up with the decomposing foam on the face seal on my FPV goggles. It was leaking light all over the place. Of course I could have bought a new seal, but then I’d have to wait a week or so for delivery. So I pulled the velcro backing off, tossed it in the bed scanner, pulled the image up in Inkscape, converted it to Gcode, and cut out a couple seals out of EVA foam on the laser. Not only are they essentially indestructible, but I was able to customize them a little bit, and the fit is now better than ever.

And then, one of our neighbors bought a new garage door fob, flipped the DIP switches into the right configuration, and couldn’t figure out why it wouldn’t open the garage door. Knock knock knock. Using the tried-and-true RF probe that everyone with a scope probe has sitting around, namely hooking the ground pin to the tip and putting the radio device in the loop, it was clear that the sense of the DIP switches was inverted from what it said in the instructions. That was a fun little puzzle.

It was the garage door opener that triggered me to think about how normal people would handle any of these situations. “How do the normies even get by?” were the exact words that went through my head. And let’s face it: we’re not entirely normal. Normal people don’t have a soldering setup just sitting around ready to get hot 24/7, or a scope to diagnose a garage door RF transmitter at the drop of a hat. But these things seem to happen to me all the time. How do the normal people survive? Maybe they all know someone with a scope?

I take it as my service to the world to be “that guy” for most of our friends and family, and I pretty much do it without complaint. “With great power” and all that. My wife is just about as gracious when she’s stuck debugging a parent’s Windows setup, so I’m not saying I’m the only saint in the world, either. Surely you have similar stories.

But last week it made me reflect on how good we’ve got it, and that does make me want to pay it forward a little bit. If you’re one of the people who can, try to help out those who can’t.

2025 Hackaday Speakers, Round One! And Spoilers

Supercon is the Ultimate Hardware Conference and you need to be there! Just check out this roster of talks that will be going down. We’ve got something for everyone out there in the Hackday universe, from poking at pins, to making things beautiful, to robots, radios, and FPGAs. And this isn’t even half of the list yet.

We’ve got a great mix of old favorites and new faces this year, and as good as they are, honestly the talks are only half of the fun. The badge hacking, the food, the brainstorming, and just the socializing with the geekiest of the geeky, make it an event you won’t want to miss. If you don’t have tickets yet, you can still get them here.

Plus, this year, because Friday night is Halloween, we’ll be hosting a Sci-Fi-themed costume party for those who want to show off their best props or most elaborate spacesuits. And if that is the sort of thing that you’re into, you will absolutely want to stay tuned to our Keynote Speaker(s) announcement in a little while. (Spoiler number one.) Continue reading “2025 Hackaday Speakers, Round One! And Spoilers”

Whither The Chip Shortage?

Do you remember the global chip shortage? Somehow it seems so long ago, but it’s not even really been three years yet. Somehow, I had entirely forgotten about it, until two random mentions about it popped up in short succession, and brought it all flooding back like a repressed bad dream.

Playing the role of the ghost-of-chip-shortage-past was a module for a pair of FPV goggles. There are three versions of the firmware available for download at the manufacturer’s website, and I had to figure out which I needed. I knew it wasn’t V1, because that was the buggy receiver PCB that I had just ordered the replacement for. So it was V2 or V3, but which?

Digging into it, V2 was the version that fixed the bug, and V3 was the redesign around a different microcontroller chip, because they couldn’t get the V2 one during the chip shortage.

I saw visions of desperate hackers learning new toolchains, searching for alternative parts, finding that they could get that one chip, but that there were only 20 of them left and they were selling for $30 instead of $1.30. I know a lot of you out there were designing through these tough couple years, and you’ve all probably got war stories.

And yet here we are, definitively post-chip-shortage. How can you be sure? A $30 vape pen includes a processor that we would have killed for just three years ago. The vape includes a touchscreen, just because. And it even has a Bluetooth LE chip that it’s not even using. My guess is that the hardware designers just put it in there hoping that the firmware team would get around to using it for something.

This vape has 16 MB of external SPI Flash! During the chip shortage, we couldn’t even get 4 MB SPI flash.

It’s nice to be on the other side of the chip shortage. Just order whatever parts you want and you get them, but don’t take for granted how luxurious that feels. Breathe easy, and design confidently. You can finally use that last genuine STM32F103 blue pill board without fear of it being the last one on earth.

(Featured image is not an actual photo of the author, although he does sometimes have that energy.)

2025 Hackaday Superconference: Announcing Our Workshops And Tickets

Can you feel the nip of fall in the air? That can only mean one thing: Supercon is just around the corner. The next few weeks are going to bring a blitz of Supercon-related reveals, and we’re starting off with a big one: the workshops.

Supercon is the Ultimate Hardware Conference, and you need to be there to attend a workshop. Both workshop and general admission tickets are on sale now! Don’t wait — they sell out fast.

Continue reading “2025 Hackaday Superconference: Announcing Our Workshops And Tickets”

Worst Clock Ever Teaches You QR Codes

[WhiskeyTangoHotel] wrote in with his newest clock build — and he did warn us that it was minimalist and maybe less than useful. Indeed, it is nothing more than a super-cheap ESP32-C3 breakout board with an OLED screen and some code. Worse, you can’t even tell the time on it without pointing your cell phone at the QR code it generates. Plot twist: you skip the QR code and check the time on your phone.

But then we got to thinking, and there is actually a lot to learn from here on the software side. This thing pulls the time down from an NTP server, formats it into a nice human-readable string using strftime, throws that string into a QR code that’s generated on the fly, and then pushes the bits out to the screen. All in a handful of lines of code.

As always, the secret is in the libraries and how you use them, and we wanted to check out the QR code generator, but we couldn’t find an exact match for QRCodeGenerator.h. Probably the most popular library is the Arduino QRCode library by [ricmoo]. It’s bundled with Arduino, but labelled version 0.0.1, which we find a little bit modest given how widely it’s used. It also hasn’t been updated in eight years: proof that it just works?

That library drew from [nayuki]’s fantastically documented multi-language QR-Code-generator library, which should have you covered on any platform you can imagine, with additional third-party ports to languages you haven’t even heard of. That’s where we’d go for a non-Arduino project.

What library did [WTH] use? We hope to find out soon, but at least we found a couple good candidates, and it appears to be a version of one or the other.

We’ve seen a lot of projects where the hacker generates a QR code using some online tool, packs the bits into a C header array, and displays that. That’s fine when you only need a single static QR code, but absolutely limiting when you want to make something dynamic. You know, like an unreadable clock.

You will not be surprised to know that this isn’t the first unreadable QR-code clock we’ve featured here. But it’s definitely the smallest and most instructive.

Continue reading “Worst Clock Ever Teaches You QR Codes”

PCBs The Prehistoric Way

When we see an extremely DIY project, you always get someone who jokes “well, you didn’t collect sand and grow your own silicon”. [Patrícia J. Reis] and [Stefanie Wuschitz] did the next best thing: they collected local soil, sieved it down, and fired their own clay PCB substrates over a campfire. They even built up a portable lab-in-a-backpack so they could go from dirt to blinky in the woods with just what they carried on their back.

This project is half art, half extreme DIY practice, and half environmental consciousness.  (There’s overlap.)  And the clay PCB is just part of the equation. In an effort to approach zero-impact electronics, they pulled ATmega328s out of broken Arduino boards, and otherwise “urban mined” everything else they could: desoldering components from the junk bin along the way.

The traces themselves turned out to be the tricky bit. They are embossed with a 3D print into the clay and then filled with silver before firing. The pair experimented with a variety of the obvious metals, and silver was the only candidate that was both conductive and could be soldered to after firing. Where did they get the silver dust? They bought silver paint from a local supplier who makes it out of waste dust from a jewelry factory. We suppose they could have sat around the campfire with some old silver spoons and a file, but you have to draw the line somewhere. These are clay PCBs, people!

Is this practical? Nope! It’s an experiment to see how far they can take the idea of the pre-industrial, or maybe post-apocalyptic, Arduino. [Patrícia] mentions that the firing is particularly unreliable, and variations in thickness and firing temperature lead to many cracks. It’s an art that takes experience to master.

We actually got to see the working demos in the flesh, and can confirm that they did indeed blink! Plus, they look super cool. The video from their talk is heavy on theory, but we love the practice.

DIY clay PCBs make our own toner transfer techniques look like something out of the Jetsons.

Continue reading “PCBs The Prehistoric Way”

Smooth! Non-Planar 3D Ironing

Is 2025 finally the year of non-planar 3D printing? Maybe it won’t have to be if [Ten Tech] gets his way!

Ironing is the act of going over the top surface of your print again with the nozzle, re-melting it flat. Usually, this is limited to working on boring horizontal surfaces, but no more! This post-processing script from [Tenger Technologies], coupled with a heated, ball-shaped attachment, lets you iron the top of arbitrary surfaces.

At first, [Ten Tech] tried out non-planar ironing with a normal nozzle. Indeed, we’ve seen exactly this approach taken last year.  But that approach fails at moderate angles because the edge on the nozzle digs in, and the surrounding hot-end parts drag.

[Ten Tech]’s special sauce is taking inspiration from the ball-end mill finishing step in subtractive CNC work: he affixed the round tip of a rivet on the end of a nozzle, and insulating that new tool turned it into an iron that could smooth arbitrary curvy top layers.

One post-processing script later, and the proof of concept is working. Check out the video below to see it in action. As it stands, this requires a toolhead swap and the calibration of a whole bunch of new parameters, but it’s a very promising new idea for the community to iterate on. We love the idea of a dedicated tool and post-processing smoother script working together in concert.

Will 2025 be the year of non-planar 3DP? We’ve seen not one but two superb multi-axis non-planar printer designs so far this year: one from [Joshua Bird] and the other from [Daniel] of [Fractal Robotics]. In both cases, they are not just new machines, but are also supported with novel open-source slicers to make them work. Now [Ten Tech]’s ironer throws its hat in the ring. What will we see next?

Thanks to [Gustav Persson] for the tip!

Continue reading “Smooth! Non-Planar 3D Ironing”