Author: Zoe Skyforest

3645 Articles

A Super-Cheap Turntable Build For Photographic Purposes

June 13, 2023 by 16 Comments

When it comes to photographing products or small items, sometimes it’s useful to get vision from all angles. Shooting a video of an item on a turntable is an ideal way to do this. [ROBO HUB] built a super-cheap turntable for just this purpose.

The build relies upon a regular micro servo to handle rotating the turntable. However, it has been modified from stock to rotate 360 degrees instead of its usual 180 degree range of motion. This is a common hack that allows servos to be used for driving wheels or other rotating mechanisms. In this case, though, any positional feedback is ignored. Instead, the servo is just used as a conveniently-geared motor, with its speed controlled via a potentiometer. A CD covered in paper is used as a turntable, with the electronics and motor assembled in a cardboard base.

It’s a simple hack, and one you can probably put together with the contents of your junk drawer. Combined with a lightbox, it could up your photo and video game significantly. Those skills are super useful when it comes to documenting your projects, after all!

Cheap USB Sniffer Has Wireshark Interface

June 13, 2023 by 31 Comments

If you’ve done any development on USB hardware, you’ve probably wished you could peek at the bits and bytes as they pass through the data lines. Sometimes, it’s the only way to properly understand what’s going on. [ataradov]’s USB sniffer is built to do just that. 

To sniff high-speed USB communications, the device relies on a Lattice LCMXO2 FPGA and a Cypress CY7C68013A microcontroller, paired with a Microchip USB3343 USB PHY. This setup is capable of operating at data rates of up to 40-50 MB/s, more than enough to debug the vast majority of USB peripherals on the market.

The device is built specifically for use with Wireshark. Most commonly used for network packet sniffing, Wireshark can also be used with a wide variety of other capture hardware for other debugging tasks, as seen here. In addition to live sniffing, it also allows captured data to be saved for later analysis.

If you need this tool, spinning up your own is straightforward. Gerber files are available and the required components can be bought off the shelf. Once assembled, you can program the chips via USB, with no external hardware programmer required.

We’ve seen some other similar hardware before. Meanwhile, if you’re whipping up your own useful debug tools, don’t hesitate to drop us a line!

Art of 3D printer in the middle of printing a Hackaday Jolly Wrencher logo

Microsculptures 3D Printed With Advanced Macromolecular “Inks”

June 5, 2023 by 3 Comments

When we think about 3D printing, our mind often jumps to hot nozzles squirting out molten plastic. Other popular techniques include flashing bright light into resin, or using lasers to fuse together metal powders. All these techniques are great at producing parts with complicated geometries at desktop scales.

However, it’s also possible to 3D print at altogether microscopic scales. Researchers in Germany have now developed advanced macromolecular “inks” that can be used to create microscopic 3D sculptures with finer control than ever before.

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Bike Rides Played Back Via Aircraft Altitude Indicator

June 3, 2023 by 7 Comments

Any good bike ride should have a big climb to push your fitness, and a nice descent for the joy of careening down at high speed. [Glen Akins] has been recording his altitude during his mountain biking expeditions, and has now built a way to play them back on an aircraft altitude indicator.

A Python script is used to parse a recorded GPX file, which stores position and elevation data captured from a GPS device during [Glen]’s rides. The elevation data is then output to a Raspberry Pi Pico, which drives a set of three Microchip MCP4802 DACs and three TI OPA584 op-amps in order to create the necessary 400 Hz AC waveforms to drive the aircraft altitude indicator. One DAC and op-amp are used to generate 400 Hz AC to simply power the device, while the other two are used to generate synchro signals to actually drive the dial as needed. The maths involved is worth checking out, particularly if you’re into old-school instrumentation from the 20th century.

We’ve seen similar tinkering efforts from [Glen] before, too.

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ADATA SSD Gets Liquid Cooling, But Not Everyone’s Convinced

June 3, 2023 by 19 Comments

Solid-state drives (SSDs) were a step change in performance when it came to computer storage. They offered incredibly fast seek times by virtue of dispensing with solid rust for silicon instead. Now, some companies have started pushing the limits to the extent that their drives supposedly need liquid cooling, as reported by The Register.

The device in question is the ADATA Project NeonStorm, which pairs a PCIe 5.0 SSD with RGB LEDs, a liquid cooling reservoir and radiator, and a cooling fan. The company is light on details, but it’s clearly excited about its storage products becoming the latest piece of high-end gamer jewelry.

Notably though, not everyone’s jumping on the bandwagon. Speaking to The Register, Jon Tanguy from Crucial indicated that while the company has noted modern SSDs running hotter, it doesn’t yet see a need for active cooling. In their case, heatsinks have proven enough. He notes that NAND flash used in SSDs actually operates best at 60 to 70 C. However, going beyond 80 C risks damage and most drives will shutdown or throttle access at this point.

Realistically, you probably don’t need to liquid cool your SSDs, even if you’ve got the latest and greatest models. However, if you want the most tricked out gaming machine on Twitch, there’s plenty of products out there that will happily separate you from your money.

Zelda Guardian Sculpture Tracks Humans And Pets Via Camera

June 3, 2023 by 3 Comments

In The Legend of Zelda: Breath of the Wild Guardians are a primitive form of sentry turret that tracks the player with a watchful eye. Inspired by this, [npentrel] decided to whip up one of her own in the real world.

The build relies on a Raspberry Pi kitted out with its usual camera for machine vision purposes. It uses the Viam robot toolkit, which runs a machine learning model to detect pets and humans on the camera feed. The guardian then tracks any pets or humans that show up by turning its head, and thus the camera, with a servo controlled by a PWM signal via the Raspberry Pi’s GPIO pins. It’s all wrapped up in a nicely-decorated 3D printed model that really does look like something straight out of Breath of the Wild.

Sentry projects are a great way to learn about electronics, mechanics, and image processing techniques. It’s funny to see how advanced and complicated these projects were fifteen years ago, compared to how easy they are today with modern machine learning libraries. How times change!

C64 Gets ChatGPT Access Via BBS

June 2, 2023 by 4 Comments

ChatGPT, powered by GPT 3.5 and GPT 4, has become one of the most popular Large Language Models (LLM), due to its ability to hold passable conversations and generate large tracts of text. Now, that very tool is available on the Commodore 64 via the Internet.

Obviously, a 6502 CPU with just 64 kilobytes of RAM can barely remember a dictionary, let alone the work with something as complicated as a modern large language model. Nor is the world’s best-selling computer well-equipped to connect to modern online APIs. Instead, the C64 can access ChatGPT through the Retrocampus BBS, as demonstrated by [Retro Tech or Die].

Due to security reasons, the ChatGPT area of the BBS is only available to the board’s Patreon members. Once in, though, you’re granted a prompt with ChatGPT displayed in glorious PETSCII on the Commodore 64. It’s all handled via a computer running as a go-between for the BBS clients and OpenAI’s ChatGPT service, set up by board manager [Francesco Sblendorio]. It’s particularly great to see ChatGPT spitting out C64-compatible BASIC.

While this is a fun use of ChatGPT, be wary of using it for certain tasks in wider society. Video after the break.

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