Smartphone Runs Home Server

It’s one of the great tragedies of our technological era. Smartphones that feature an incredible amount of computational power compared to computers the past, are largely locked down by carriers or manufacturers, dooming them to performing trivial tasks far below their true capabilities.

But there is hope. In part one of this build, a OnePlus 6T is stripped of its Android operating system in favor of postmarketOS, a Linux distribution based on Alpine designed for a number of Android phones and tablets as well as some Linux-only handhelds. The guide also demonstrates how to remove the battery and use a modified USB-C cable to essentially trick the battery management system into powering up the phone anyway. The second part of the project dives into the software side, getting the Linux system up and running before installing Docker and whichever Docker containers the user needs.

There are a few downsides to running a server from a smartphone. Although there’s plenty of processing power available for a wide range of applications, most phones won’t have Ethernet support out-of-the-box which forces the use of WiFi. There’s also limited storage options available, so a large NAS system may be out of reach. But for something like a home automation system or a music streaming server this could put plenty of older devices to work again. And if you don’t want to hunt for an Android phone that isn’t completely hobbled out-of-the box you might want to try a phone that’s Linux-based from the get-go instead.

Thanks to [JohnU] for the tip!

PlayStation Motherboard Sanded And Scanned, But There’s More To Do

If you want to reverse engineer the boards in a modern console, you’d better have a lab, a lot of fancy gear, and a good few months to dedicate to the task. The humble PlayStation, on the other hand, is more accessible in this regard. [Lawrence Brode] pulled one apart and started documenting it as part of a grander quest for console understanding.

[Lawrence’s] ultimate goal is to create a portable PlayStation using original hardware. That is, rather than cannibalizing an existing console, he wants to build an original portable from scratch. He needed to understand the PlayStation to recreate it, so he started by analyzing the original hardware.

The first part of [Lawrence’s] quest was to try and reverse engineer the PlayStation motherboard itself. The 1990s console has the benefit of only using a two-layer PCB, meaning it’s far easier to trace out than more modern multi-layer designs. [Lawrence] started with a damaged console, pulled out the motherboard, and stripped off all the components. He then cleaned the board, scanned it, and then sandblasted it to remove the solder mask.

He’s begun the work of tracing out signals, and next on the agenda is to create a new custom PCB that’s compatible with the original PlayStation hardware. You can grab his work via GitHub if you’re interested. [Lawrence] is also excited about the possibilities of grabbing the 24-bit RGB signal heading into the GPU and using it for an HDMI output conversion in the future.

It’s always an exciting time in the PlayStation community; we see lots of great hacks on the regular. If you’re cooking up your own, don’t hesitate to drop us a line!

Raspberry Pi 500 And The Case Of The Missing M.2 Slot

Raspberry Pi just dropped the new Raspberry Pi 500, which like its predecessor puts the similarly named SBC into a keyboard. In a detailed review and teardown video, [Jeff Geerling] goes over all the details, and what there is to like and not like about this new product.

The new Raspberry Pi 500 with the new Raspberry Pi Monitor. (Credit: Jeff Geerling)
The new Raspberry Pi 500 with the new Raspberry Pi Monitor. (Credit: Jeff Geerling)

Most of the changes relative to the RP400 are as expected, with the change to the same BCM2712 SoC as on the Raspberry Pi 5, while doubling the RAM to 8 GB and of course you get the soft power button. As [Jeff] discovers with the teardown, the odd thing is that the RP500 PCB has the footprints for an M.2 slot, as seen on the above image, but none of the components are populated.

Naturally, [Jeff] ordered up some parts off Digikey to populate these footprints, but without luck. After asking Raspberry Pi, he was told that these footprints as well as those for a PoE feature are there for ‘flexibility to reuse the PCB in other contexts’. Sadly, it seems that these unpopulated parts of the board will have to remain just that, with no M.2 NVMe slot option built-in. With the price bump to $90 from the RP400’s $70 you’ll have to do your own math on whether the better SoC and more RAM is worth it.

In addition to the RP500 itself, [Jeff] also looks at the newly launched Raspberry Pi Monitor, a 15.6″ IPS display for $100. This unit comes with built-in speakers and VESA mount, but as [Jeff] notes in his review, using this VESA mount also means that you’re blocking all the ports, so you have to take the monitor off said VESA mount if you want to plug in or out any cables.

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3D scanned image of LEGO sheep

Do 3D Printers Dream Of LEGO Sheep?

Imagine the power to clone your favorite LEGO piece—not just any piece, but let’s say, one that costs €50 second-hand. [Balazs] from RacingBrick posed this exact question: can a 3D scanner recreate LEGO pieces at home? Armed with Creality’s CR-Scan Otter, he set out to duplicate a humble DUPLO sheep and, of course, tackle the holy grail of LEGO collectibles: the rare LEGO goat.

The CR-Scan Otter is a neat gadget for hobbyists, capable of capturing objects as small as a LEGO piece. While the scanner proved adept with larger, blocky pieces, reflective LEGO plastic posed challenges, requiring multiple scans for detailed accuracy. With clever use of 3D printed tracking points, even the elusive goat came to life—albeit with imperfections. The process highlighted both the potential and the limitations of replicating tiny, complex shapes. From multi-colored DUPLO sheep to metallic green dinosaur jaws, [Balazs]’s experiments show how scanners can fuel customization for non-commercial purposes.

For those itching to enhance or replace their builds, this project is inspiring but practical advice remains: cloning LEGO pieces with a scanner is fun but far from plug-and-play. Check out [Balazs]’s exploration below for the full geeky details and inspiration.

Continue reading “Do 3D Printers Dream Of LEGO Sheep?”

Illustrated Kristina with an IBM Model M keyboard floating between her hands.

Keebin’ With Kristina: The One With The Funny Keyboard

What’s the most important keyboard macro you know? Honestly, it’s probably Ctrl-S. But do you use that one often enough? Chances are, you do not. What you need is a giant, dedicated Save keyboard that looks like a floppy disk.

A physical Save button that looks like a floppy disk and sends Ctrl-S over USB-C.
Image by [Makestreme] via Hackaday.IO
[Makestreme] recently started creating YouTube videos, but wasn’t pressing Save often enough. Couple that with editing software that crashes, and the result is hours of lost work.

Just like you’d expect, pressing the floppy icon triggers Ctrl-S when connected over USB-C. Internally, it’s a Seeeduino Xiao, a push button, and some wires.

The floppy disk itself is made of foam board, and everything is encased in a picture frame. If you want to make one for yourself, [Makestreme] has some great instructions over on IO.

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Electric Bike Uses No Electronics, Weird Motor

E-bikes combine a bicycle with a big lithium battery, a speed controller, and a motor. What you get from that combination is simple, efficient transportation. [Tom Stanton] wanted to build an e-bike himself, but he did it without any of the fancy electronic components. But the real gem? The weird janky motor he built to run it.

The concept is simple. An e-bike is electric, in that it has an electric motor and a source of electric power. However, [Tom] intended to eliminate the electronic parts—the speed controller, any battery balancing hardware, and the like. Just think no transistors and microchips and you’ve got the right idea. Basically, [Tom] just built an e-bike with motor weak enough that it doesn’t need any fancy throttle control. He can just turn the motor hard on or off with a switch.

The bike is built around a reed switch motor. This uses magnets on a rotor, which interact with a reed switch to time pulses of electricity to coils which drive the motor. [Tom] wound the coils and built the motor from scratch using 3D printed components. The project quickly ran into problems as the reed switch began to suffer degradation from arcing, which [Tom] solved with some innovative tungsten contacts.

Controlling the bike is pretty simple—there’s just a switch connecting a capacitor bank to the motor to provide power on command. No electronics! However, [Tom] has also neatly set up the motor to charge a bank of supercapacitors when coasting downhill. In this regard, the bike can store power on a descent and then use it for a boost when required later on. Between the weird motor and the weedy capacitor bank, it doesn’t do much, but it does work.

If he’s looking for a more potent power source, perhaps the answer is already out on the street — in the form of a battery pack salvaged from the cells in discarded vapes.
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Finally Putting The RK1 Through Its Paces

The good folks at Turing Pi sent me a trio of RK1 modules to put through their paces, to go along with the single unit I bought myself. And the TLDR, if you need some real ARM processing power, and don’t want to spend an enterprise budget, a Turing Pi 2 filled with RK1s is a pretty compelling solution. And the catch? It’s sporting the Rockchip RK3588 processor, which means there are challenges with kernel support.

For those in the audience that haven’t been following the Turing Pi project, let’s recap. The Turing Pi 1 was a mini ITX carrier board for the original Raspberry Pi compute module, boasting 7 nodes connected with onboard Gigabit.

That obviously wasn’t enough power, and once Raspberry Pi released the CM4, the Turing Pi 2 was conceived, boasting 4 slots compatible with the Nvidia Jetson compute units, as well as the Raspberry Pi CM4 with a minimal adapter. We even covered it shortly after the Kickstarter. And now we have the RK1, which is an 8-core RK3588 slapped on a minimal board, pin compatible with the Nvidia Jetson boards. Continue reading “Finally Putting The RK1 Through Its Paces”