Fibonacci512 giant LED disc

From Jason Coon of Evil Genius Labs:

Fibonacci512 is a giant, beautiful 320mm circular disc with 512 RGB LEDs surface mounted in a Fibonacci distribution. Swirling and pulsing like a colorful galaxy, it’s mesmerizing to watch.

It consists of 512 WS2812B-Mini 3535 RGB LEDs, arranged into a circular Fermat’s spiral pattern.

I have created several LED art pieces in Fibonacci patterns. They are all very labor intensive to create, and so are fairly expensive and limited in quantity. I wanted to come up with a Fibonacci layout that was at least slightly easier to create, and therefore more affordable.

I have RGB LEDs in just about every form they come: strips, strings, rings, discs, etc. The LEDs on most discs are arranged in very regular rings. Fibonacci512 is different. The LEDs are arranged in a Fibonacci distribution. The makes the layout very organic and seemingly messy. But with the proper animation, spiral patterns emerge with spectacular results.

Each of the 512 WS2812B-Mini 3535 RGB LEDs has its own decoupling capacitor built in. The top and bottom of the PCB are large 5V and GND planes, to allow for the large amount of current required by the 512 LEDs. The PCB is split into four separate data lines to allow for higher frame rates when driven by a microcontroller that supports the FastLED library’s parallel output, such as ESP8266, ESP32, Teensy, etc. The max theoretical frame rate with four way parallel output is ~260 FPS. Each of the four data lines has a separate four-pin headers provided for 5V, Data In (to the section), Data Out (from the previous section) and GND. The last Data Out pin can be used to connect to even more LEDs. There are also small jumper solder pads that can be bridged to drive the whole panel with a single pin (max ~65 FPS), or two pins (max 130 FPS).

Read more on Tindie…

Fibonacci512 giant LED disc

Modchip style SOIC8 EEPROM to Stemma QT adapter


Francois Gervais
designed this clever flexible PCB:

Modchip style SOIC8 EEPROM to Stemma QT adapter

The design is available as a shared project:

Modchip style SOIC8 EEPROM to Stemma QT adapter

Open Hardware 101: An Introduction for Policymakers

Great set of talks from Javier Serrano of CERN, Rick O’Conner of OpenHW Group, Calista Redmore of RISC-V International, and more:

One of the most advanced areas in Open Hardware is open chips, a critical dependency for the European Union. Open chips have the potential to be beneficial in terms of their adaptability, speed and potential for increasing digital sovereignty in several sectors, including automotive industry, edge computing, data storage solutions, aerospace, energy or health.

By drawing lessons from Open Source Software, Europe can realise vast value from Open Hardware for its economy and citizens. There is a need for more debate on opportunities and challenges of Open Hardware, its potential for scaling up and supporting more collaborative and open infrastructure underlying all other layers of the digital ecosystem we know.

Open Hardware 101: An Introduction for Policymakers

Open Source Hardware Certifications for May 2021

Salman Faris of OSHWA write about the latest ceritied Open Source Hardware in Make:

Open Source Hardware Certifications for May 2021

In May 2021 the Open Source Hardware Association (OSHWA) certified a wide variety of hardware as open source.  we will have a certified variety collection of Open Source Hardwares, Let’s take a look! (And remember, certification is a free and easy way to show that your hardware complies with the open source hardware definition.)

First, many makers are interested in space and astronomy. The Astrohat is a Raspberry Pi 4 compatible hat for all your astronomy equipment. It comes with six 12V controllable outputs @3A each with current monitoring (2 PWM controllable for dew heaters), a temperature, humidity and pressure sensor port (external module), one adjustable 6-12 V output, and one port for serial communication and power to external device like a GPS. It’s the 5th piece of certified hardware from Greece. You can find the details here.

Read more…


Open Source Hardware Certifications for May 2021

Harnessing the Benefits of Open Electronics in Science

Michael Oellermann asks:

Wonder how Open Electronics can help scientist to make lab life easier, help institutions to reduce costs and aid science to become more reproducible, innovative, and collaborative?

Find out in this paper:

Harnessing the Benefits of Open Electronics in Science

Freely and openly shared low-cost electronic applications, known as open electronics, have sparked a new open-source movement, with much un-tapped potential to advance scientific research. Initially designed to appeal to electronic hobbyists, open electronics have formed a global community of “makers” and inventors and are increasingly used in science and industry. Here, we review the current benefits of open electronics for scientific research and guide academics to enter this emerging field. We discuss how electronic applications, from the experimental to the theoretical sciences, can help (I) individual researchers by increasing the customization, efficiency, and scalability of experiments, while improving data quantity and quality; (II) scientific institutions by improving access and maintenance of high-end technologies, visibility and interdisciplinary collaboration potential; and (III) the scientific community by improving transparency and reproducibility, helping decouple research capacity from funding, increasing innovation, and improving collaboration potential among researchers and the public. Open electronics are powerful tools to increase creativity, democratization, and reproducibility of research and thus offer practical solutions to overcome significant barriers in science.

Harnessing the Benefits of Open Electronics in Science

Review of AD409 Digital Microscope

It wasn’t that long ago that if you had an optical microscope in your electronics shop, you had a very well-supplied shop indeed. Today, though, a microscope is almost a necessity since parts have shrunk to flyspeck-size. [Maker Mashup] recently picked up an AD409 and posted a video review of the device that you can see below.

The microscope in question has a 10-inch screen so it is a step up from the usual cheap microscope we’ve seen on a lot of benches. Of course, that size comes at a price. The going rate for a new on is about $400.

If the 10 inch screen isn’t enough, you can connect the microscope to an external monitor. That does disable the onboard monitor, though. The microscope offers plenty of space to solder under and has a removable lens and filter so you can add filters or even put on a wide-angle lens.

Read more on Hackaday…

Review of AD409 Digital Microscope

Open source BioAmp measures EEG, ECG, EMG and EOG

BioAmp EXG Pill is an open source biopotential analog front-end (AFE) module from Upside Down Labs. Based on TL074 quad low-noise JFET-input operational amplifier, the EXG Pill works as a single channel biopotential amplifier that can amplify low magnitude electrical signals produced by our body. The EXG in the name is a placeholder. Replace the “X”, and you get EEG, ECG, EMG and EOG. And yes, the EXG Pill can measure all these signals if you configure it appropriately and use the right firmware. BioAmp EXG Pill can be interfaced to any 5V microcontrollers. The analog output from the module can be sampled by internal ADCs of microcontrollers or external ones.

The project is completely open source, allowing you to get a copy of all the source files, and modify and redistribute them as you wish. BioAmp EXG Pill v1.0 will be soon launched at Crowd Supply. If you want to get your hands on one, be quick to subscribe to the project page at Crowd Supply. Once the project is active, you can pre-order the modules.

Read more…

Open source BioAmp measures EEG, ECG, EMG and EOG

Hackaday Prize: winners of the Rethink Displays round

We asked you to rethink what displays can look like and you didn’t disappoint. From almost 150 entries the judges have winnowed the list down to ten projects which are awarded a $500 prize and will go on to the final round of the 2021 Hackaday Prize in October

In a world where there’s an HD (or better) display in every pocket, it is the oddball ideas that tend to turn heads. High on that list is a volumentric display that levitates a tiny foam ball on ultrasonic transducers to draw 3D color patterns before your eyes, or the volumetric display shown above that works with a sheet of film and motors. Or how about a take on a laser projected display that uses a phosphorescent screen so that the path of the laser persists, fading in time for the next infrequent update.

Read more on Hackaday…

Hackaday Prize: winners of the Rethink Displays round