https://kittenlabs.de/projects/art/Recent content in Art on KittenLabsHugoenTue, 10 Oct 2023 00:00:00 +0000https://kittenlabs.de/blinkekatze/Tue, 10 Oct 2023 00:00:00 +0000https://kittenlabs.de/blinkekatze/<figure class="card rounded p-2 td-post-card mb-4 mt-4" style="max-width: 410px"> <img class="card-img-top" src="https://kittenlabs.de/blinkekatze/featured-blinkekatze_hu_8528057269992d99.jpg" width="400" height="300"> <figcaption class="card-body px-0 pt-2 pb-0"> <p class="card-text"> <p>Wild Blinkekatzen in their natural habitat</p> </p> </figcaption> </figure> <h2 id="what-is-it">What is it?<a class="td-heading-self-link" href="#what-is-it" aria-label="Heading self-link"></a></h2> <p>Blinkekatzen are a replacement PCB for commercially available silicone LED lights.<br> The lights usually contain a battery, some RGB LEDs and an optical diffuser in a soft cat shaped translucent silicone housing. The light emitted by the LEDs hits the diffuser and lights up the outer cat shaped silicone shell.</p>https://kittenlabs.de/oled-nametag/Sat, 03 Jun 2023 00:00:00 +0000https://kittenlabs.de/oled-nametag/<img src="featured-badge_main_screen_small.webp" width="60%" alt="OLED nametag"> <h2 id="features">Features<a class="td-heading-self-link" href="#features" aria-label="Heading self-link"></a></h2> <ul> <li>Bright, sunlight readable OLED display</li> <li>Infinity constrast ratio</li> <li>Support for GIF animations</li> <li>WLAN AP support</li> <li>Web interface for management of animations</li> <li>Automatic brightness adjustment</li> <li>8h+ runtime</li> </ul> <h2 id="links">Links<a class="td-heading-self-link" href="#links" aria-label="Heading self-link"></a></h2> <ul> <li><a href="https://github.com/TobleMiner/oled-nametag" target="_blank">Hardware</a>: KiCAD design files</li> <li><a href="https://github.com/TobleMiner/oled-nametag-firmware" target="_blank">Firmware</a>: ESP-IDF source code</li> </ul>https://kittenlabs.de/analog-floppy-synth/Sat, 29 Oct 2022 00:00:00 +0000https://kittenlabs.de/analog-floppy-synth/<video width="90%" controls> <source src="popcorn.mp4" type="video/mp4"> Your browser does not support the video tag. </video> <h2 id="what-is-it">What is it?<a class="td-heading-self-link" href="#what-is-it" aria-label="Heading self-link"></a></h2> <p>3.5&quot; floppy disks hold information by storing them magnetically on 80 different tracks (effectively circles) across the media. A stepper motor moves a read/write head across the media and can select which track is being accessed.</p> <p>In normal computer usage, the tracks are being formatted/modulated with modified frequency modulation (MFM) to store digital data onto these tracks.</p>https://kittenlabs.de/rgb-led-nametag/Wed, 29 Dec 2021 00:00:00 +0000https://kittenlabs.de/rgb-led-nametag/<video width="60%" controls muted autoplay> <source src="rgbled.mp4" type="video/mp4"> Your browser does not support the video tag. </video> <h2 id="hardware">Hardware<a class="td-heading-self-link" href="#hardware" aria-label="Heading self-link"></a></h2> <img src="featured-pcb_back.png" width="70%" alt="KiCad 3d rendering of RGB nametag PCB"> <h2 id="specs">Specs<a class="td-heading-self-link" href="#specs" aria-label="Heading self-link"></a></h2> <ul> <li>1x STM32F7 taking care of power management, USB and display multiplexing</li> <li>1x ESP32 Pico D4 providing a web interface to build and store animations</li> <li>20x HC595 shift registers for row and column control</li> <li>768x Tiny 1x1mm RGB LEDs arranged in 1.7mm pitch grid</li> </ul> <h2 id="features">Features<a class="td-heading-self-link" href="#features" aria-label="Heading self-link"></a></h2> <ul> <li>only 84mm wide and 29mm tall</li> <li>WLAN enabled</li> <li>48x16 glorious RGB led pixels with more than 16 million colors each</li> <li>Powerful ARM Cortex M7 and Xtensa 32bit dual core</li> <li>3MB of onboard data storage</li> </ul> <h2 id="links">Links<a class="td-heading-self-link" href="#links" aria-label="Heading self-link"></a></h2> <ul> <li><a href="https://github.com/TobleMiner/RGB-led-nametag" target="_blank">Hardware (Nametag)</a>: KiCAD design files</li> <li><a href="https://github.com/TobleMiner/16x16-RGB-led-panel" target="_blank">Hardware (16x16 matrix)</a>: KiCAD design files</li> </ul>https://kittenlabs.de/led-wall/Sat, 11 Sep 2021 00:00:00 +0000https://kittenlabs.de/led-wall/<p><img src="featured-IMG_2306.JPG" width="49%" alt="LED wall, giving off white light on a foggy night"> <img src="IMG_2298.JPG" width="49%" alt="Raspberry Pi 4, 3 STM32 boards"></p> <h2 id="what-is-it">What is it?<a class="td-heading-self-link" href="#what-is-it" aria-label="Heading self-link"></a></h2> <p>At the Hacken Open Air 2021 (Gifhorn, Germany) event, this 5m by 3m large LED display was built.<br> It consists of 50 individual LED strings with 50 WS2812 LEDs each (50x50 pixels).</p> <p>A central Raspberry Pi feeds 3 seperate <a href="https://github.com/TobleMiner/STM32-RedPill" target="_blank">STM32F722</a> via UART. These then generate the pixel data for the individual chains of LEDs. Each LED chain has it&rsquo;s own 24V -&gt; 5V buck regulator.</p>https://kittenlabs.de/mn12864k-vfd/Sun, 27 Sep 2020 00:00:00 +0000https://kittenlabs.de/mn12864k-vfd/<p><img src="featured-cube.jpeg" width="49%" alt="MN12864K VFD, showing a cube"> <img src="firstlight.jpeg" width="49%" alt="MN12864K VFD, showing random lines"></p> <h2 id="what-is-it">What is it?<a class="td-heading-self-link" href="#what-is-it" aria-label="Heading self-link"></a></h2> <p>This adapter board provides the required voltage level conversion, anode supply and filament bias voltages to run a Noritake MN12864K graphical vacuum fluorescent display.</p> <h2 id="bad-apple">Bad Apple<a class="td-heading-self-link" href="#bad-apple" aria-label="Heading self-link"></a></h2> <iframe width="90%" style="aspect-ratio: 16 / 9;" src="https://www.youtube-nocookie.com/embed/lp6mTAZll1I?si=YIGc65DVEzQl238Q" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe> <h2 id="links">Links<a class="td-heading-self-link" href="#links" aria-label="Heading self-link"></a></h2> <ul> <li><a href="https://github.com/TobleMiner/vfd-breadboard-adapter" target="_blank">Breadboard adapter</a>: KiCAD design files</li> <li><a href="https://github.com/TobleMiner/noritake_mn12864k_controller" target="_blank">STM32F7-based controller</a>: KiCAD design files</li> </ul>https://kittenlabs.de/neonmatrix/Sat, 06 Jun 2020 00:00:00 +0000https://kittenlabs.de/neonmatrix/<video width="60%" controls muted autoplay> <source src="neonmatrix.mp4" type="video/mp4"> Your browser does not support the video tag. </video> <h2 id="what-is-it">What is it?<a class="td-heading-self-link" href="#what-is-it" aria-label="Heading self-link"></a></h2> <p>The NeonMatrix 8x8 matrix uses common neon indicator bulbs to display simple graphics.<br> They can be chained and controlled directly via SPI.</p> <p>Operating voltage is about ~70V AC.<br> The circuit is pretty dangerous, all neon bulbs have high voltages on their legs, the 74HC595 shift registers are floating at mains/AC potential.</p> <h2 id="hardware">Hardware<a class="td-heading-self-link" href="#hardware" aria-label="Heading self-link"></a></h2> <p><img src="featured-neonmatrix.jpg" width="49%" alt="PCB, with 8x8 neon bulbs"> <img src="electronics.jpg" width="49%" alt="PCB, with 595 shift registers, ESP32 next to it"></p>