This Little RaspberryPi Device Lets You View Your NFTs

Snarflakes designed a Raspberry Pi-based displayer that lets you view your NFT images whenever you like.

Non-fungible tokens (NFTs) are a new concept in the world of cryptocurrency, though the idea itself is timeless. A fungible currency or commodity is one that is identical in value to every other unit of its type. Conventional currency is fungible, because a particular dollar bill always has the same value as any other dollar bill. A non-fungible commodity’s value is dependent on its own unique characteristics. Diamonds, for example, vary in value depending on their size, clarity, inclusions, and so on. NFTs are units of currency with values specific to themselves, and they’re usually represented as images. This Raspberry Pi-based device lets you view those NFT images whenever you like.

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A Mini Bluetooth Dot Matrix Printer

This ATmega328P-powered device is like a tiny modern-day telegraph printer.

YouTuber Et Discover built a miniature printer that’s controlled by his phone over Bluetooth. The device uses a pen as the marking device and a micro servo and linkage system to move it back and forth. The small strip of paper is advanced by a 24BYJ-48 stepper motor, along with a ULN2003 driver, allowing for sequential control over pen placement.

What’s interesting from a mechanical standpoint is that the pen doesn’t descend to the paper to make each dot, but instead the rig employs an electromagnet to bounce the paper up to hit the pen. A neodymium magnet is embedded in the small printed platform that rises up to receive a dot, and a boost converter is used to produce 24 volts for actuation.

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Power Supply Uses Thin Form Factor

We’ve seen lots of power supply projects that start with an ATX PC power supply. Why not? They are cheap and readily available. Generally, they perform well and have a good deal of possible output. [Maco2229’s] design, though, looks a lot different. First, it is in a handsome 3D-printed enclosure. But besides that, it uses a TFX power supply — the kind of supply made for very small PCs as you’d find in a point of sale terminal or a set-top box.

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Thingiverse Files…

A DIY Stepper Motor Analyzer Designed for Your 3D Printers

This open source analyzer comes with an easy-to-use setup and tests each and every parameter of a stepper motor.

If you have a 3D printer and want to analyze the stepper motor signals without the use of a computer and expensive stepper analyzer, then this low-cost hardware design can solve your problem. The open source analyzer comes with an easy-to-use setup and can be easily built to give you the capabilities to test each and every parameter of the stepper motor.

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Should you buy a GaN Power Adapter? Or is it a scam? || Testing GaN FETs!

In this video we will be having a closer look at GaN FETs in order to find out whether they will improve power electronics products in the future. For that I got myself a commercial GaN power adapter which I will compare with a more traditional power adapter concerning their efficiency. Afterwards I will measure the resistance and switching speed of a proper GaN FET and finally use it in a buck converter circuit to demonstrate the difference to a normal MOSFET. Let’s get started!

Cast Spells on Devices with This Magic IoT Wand

Sam March can now “magically” control smart outlets with a wand that detects gestures and sends them via Bluetooth.

As stated best by the writer Arthur C. Clarke, “Any sufficiently advanced technology is indistinguishable from magic.” Internet-connected homes can certainly feel like magic sometimes, as every appliance, light bulb, and outlet can all talk to each other and relay information for increased convenience and efficiency. However, just saying a command to your favorite digital assistant or pressing a few buttons on an app isn’t that fun, which is why Sam March decided to invent a novel way of activating smart outlets — through a magic wand. By performing certain gestures, the user can cast “spells” on specific outlets through Bluetooth.

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Boochow’s RaspberryPi Pico Receives and Decodes MIDI Signals via Its USB Port

Developed using the TinyUSB library, this project receives MIDI messages via USB and decodes them for printing via UART.

Pseudonymous developer “boochow” has used the popular Raspberry Pi Pico in the heart of a MIDI device with a difference: Rather than making music, it’s designed to monitor and display the MIDI signals received from a USB MIDI device.

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