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https://world-nuclear.org/nuclear-basics/what-is-radiation.aspx Radiation is energy travelling through space. Sunshine is one of the most familiar forms of radiation. It delivers light, heat and suntans. While enjoying and depending on it, we control our exposure to it. Beyond ultraviolet radiation from the sun are higher-energy kinds of radiation which are used in medicine and which we all get in low doses from space, from the air, and from the earth and rocks. +, <nowiki>https://fr.search.yahoo.com/yhs/search?hspart=ddc&hsimp=yhs-linuxmint&type=__alt__ddc_linuxmint_com&p=dangerous+dose+of+radiation https://www.reuters.com/article/us-how-much-radiation-dangerous-idUSTRE72E79Z20110315 * There is documented evidence associating an accumulated dose from two or three CT scans with an increased risk of cancer. The evidence is reasonably convincing for adults and very convincing for children. * Large doses of radiation or acute radiation exposure destroys the central nervous system, red and white blood cells, which compromises the immune system, leaving the victim unable to fight off infections. For example, a single one sievert (1,000 mSv) dose causes radiation sickness such as nausea, vomiting, hemorrhaging, but not death. A single dose of 5 sieverts would kill about half of those exposed to it within a month. * Exposure to 350 mSv was the criterion for relocating people after the Chernobyl accident, according to the World Nuclear Association.</nowiki> +, <nowiki>https://www.euradcom.org/top-5-sources-of-radiation-in-everyday-life/ #'''''Television''''' The average American over the age of 2 watches 4.5 hours of TV daily. The electrical conductivity in TV sets and computer monitors gives off a minimal amount of X-rays: 1 mrem per year to the typical consumer. However, there are more urgent health hazards such as obesity if you pass several hours per day immobile in front of a screen. #'''''Radon''''' A colorless, odorless gas given off by decaying uranium seeps into the foundation of one out of 15 American homes and takes up residency in their basements. Luckily, you can test your house for high levels of radon and take the necessary steps to protect your family from this gas by consulting[http://www.epa.gov www.epa.gov]. #'''''Medical Imaging''''' Obviously one does not undergo medical imaging procedures on a daily basis, but as the most common source of exposure for Americans beyond normal background radiation, medical imaging bodes mentioning. Medical imaging procedures such as dental or chest X-rays send 10 mrem to the patient. Mammograms log in at 138 mrem per image, and CT scans can deliver up to 1,000. An even higher dosage procedure, the colonography, produces 10,000 mrem, which increases your risk of cancer by 1%. However, if your doctor recommends any of these procedures, you’re better off taking the radiation risk than declining the procedure. #'''''Cell phones''''' Cell phones emit radiofrequency waves, a non-ionizing form of radiation, albeit at a low enough dose that there are no established health effects. Here you can find out more about[https://www.theverge.com/2018/4/5/17202600/cell-phone-radiation-cancer-national-toxicology-program-wireless-health-effect-fears how to avoid radiation from cell phones]. #'''''Smoking''''' It should come as no surprise that cigarettes causes health problems even beyond the carcinogens in the tar component of smoke your body takes in with each inhale. Heavy smokers increase their radiation exposure by 870 mrem per year – more than doubling or even tripling their exposure compared to non-smokers. Keep in mind that most these quotidian objects and personal habits expose you to what, in the end, is a minimal amount of radiation. To learn more about the sources and risks of radiation, consult the International Atomic Energy Agency’s findings on[https://www.iaea.org/Publications/Factsheets/English/radlife radiation in everyday life].</nowiki> , …

Genesys GCP-GC-ADM - Free Exam Questions PDF Files +

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Get Ready for Amazon Fashion's Big Style Sale - Don't Miss Out on These Amazing Deals! +

This year, Amazon has truly stepped up with its first-ever Big Style Sale dedicated entirely to fashion. Unlike their general sales, this event is focused exclusively on clothing, shoes, and accessories from over 100 brands. You’ll find well-known names alongside smaller, up-and-coming designers, making it a fantastic opportunity to explore fresh styles and try out brands you may not have discovered otherwise. +, With thousands of styles included in this sale, there’s something for every fashion lover. The sheer volume of items on sale is astounding, covering everything from casual outfits to dressier pieces, and even stylish loungewear. One of my absolute favorite picks is a trendy tie-dye romper that I found in the sale – it's so comfortable and perfect for summer! While it might already be sold out, there are plenty of other options I can’t wait to share. +, Throughout the sale, I’ll be posting my favorite finds and recent buys on Instagram, so make sure to follow along for daily updates! I’ve curated a list of must-have items, including a mix of essentials and statement pieces that stood out to me. I’ll also be including direct links to help you easily shop each look. Many of these items have already started selling quickly, so if you see something you love, I recommend snapping it up before it’s gone! +, …

Getting Started with 3.5 Inch PC State Display +

If you are a PC enthusiast, you might want to monitor the performance and status of your PC components, such as CPU, GPU, RAM, SSD, HDD, temperature, fan speed, etc. However, opening the task manager or third-party software every time you want to check this information can be inconvenient and distracting. Moreover, you might not be able to see this information when you are gaming or doing other full-screen activities. That’s why a 3.5-inch PC state display can be a great addition to your PC setup. A 3.5-inch PC state display is a small screen that can be mounted on your PC case and display various information about your PC state. It can show you the CPU model, usage, frequency, temperature, fan speed, GPU model, usage, frequency, temperature, fan speed, RAM usage, SSD/HDD usage, network speed, IP address, weather forecast, and custom information. You can also choose from different themes and orientations to suit your preferences. A 3.5-inch PC state display can help you monitor your PC state at a glance, without interrupting your workflow or gaming experience. It can also enhance the aesthetics and functionality of your PC case, making it more personalized and attractive. Whether you are a gamer, a streamer, a content creator, or a professional, a 3.5-inch PC state display can be a useful and fun tool for your PC. In this article, I will show you how to get started with a 3.5-inch PC state display, how to install it, how to customize it, and how to use it. Let’s begin! +, You must check out [https://www.pcbway.com/ PCBWAY] for ordering PCBs online for cheap! You get 10 good-quality PCBs manufactured and shipped to your doorstep for cheap. You will also get a discount on shipping on your first order. Upload your Gerber files onto [https://www.pcbway.com/ PCBWAY] to get them manufactured with good quality and quick turnaround time. PCBWay now could provide a complete product solution, from design to enclosure production. Check out their online Gerber viewer function. With reward points, you can get free stuff from their gift shop. Also, check out this useful blog on PCBWay Plugin for KiCad from [https://www.pcbway.com/blog/News/PCBWay_Plug_In_for_KiCad_3ea6219c.html here.] Using this plugin, you can directly order PCBs in just one click after completing your design in KiCad. +, The 3.5-inch PC state display comes with a metal bracket that can be attached to your PC case using screws. The bracket has four holes that match the standard 3.5-inch drive bay size. You can use the screws that came with your PC case or the display to secure the bracket to the case. Make sure the display is facing the right direction and is aligned with the bracket. Alternatively, you can use double-sided tape or Velcro to stick the display to your PC case, if you don’t want to use screws or if your case doesn’t have a 3.5-inch drive bay. You can also use a 3D-printed enclosure or a custom-made frame to mount the display on your PC case if you want to be more creative. +, …

Getting Started with DFRobot Rainbow Link +

=== 🔌 DFRobot RainbowLink (TEL0185) === * Dual TTL UART channels (A & B) via lever terminals * Built-in power outputs: 3.3V, 5V, 12V (selectable via jumper) * Plug-and-play via USB-C — auto enumerates 4 COM ports * Ideal for ESP32, STM32, LoRa, and GPS modules === 📡 SeeedStudio Wio E5 (STM32WLE5JC) === * Compact Grove-compatible LoRa module * AT command interface over UART * Default baud rate: '''9600''' * Pins: VCC, TX, RX, GND (3.3V logic) * Designed for ultra-low-power IoT applications +, You must check out [https://www.pcbway.com/ PCBWAY f]or ordering PCBs online for cheap! You get 10 good-quality PCBs manufactured and shipped to your doorstep for cheap. You will also get a discount on shipping on your first order. Upload your Gerber files onto [https://www.pcbway.com/ PCBWAY t]o get them manufactured with good quality and quick turnaround time. PCBWay now could provide a complete product solution, from design to enclosure production. Check out their online Gerber viewer function. With reward points, you can get free stuff from their gift shop. Also, check out this useful blog on PCBWay Plugin for KiCad from [https://www.pcbway.com/blog/News/PCBWay_Plug_In_for_KiCad_3ea6219c.html here. Us]ing this plugin, you can directly order PCBs in just one click after completing your design in KiCad. +, '''1️⃣ Connect Wio E5 to RainbowLink (UART A)''' === 2️⃣ Plug RainbowLink into Your PC === * Connect via USB-C cable. * Open '''Device Manager''' to identify COM ports. * You’ll see 4 ports — pick one for UART A (usually lowest COM number). === 3️⃣ Configure Serial Terminal === Use any terminal tool (CoolTerm, PuTTY, Arduino Serial Monitor) and apply: * Baud rate: '''9600''' * Data bits: 8 * Parity: None * Stop bits: 1 * Flow control: None Open the terminal on UART A’s COM port. === 4️⃣ Send AT Commands === Try a basic command: <code>AT</code> You’ll get: <code>+AT: OK</code> +, …

Getting Started with ESP-NOW +

You must check out [https://www.pcbway.com/ PCBWAY] for ordering PCBs online for cheap! You get 10 good-quality PCBs manufactured and shipped to your doorstep for cheap. You will also get a discount on shipping on your first order. Upload your Gerber files onto [https://www.pcbway.com/ PCBWAY] to get them manufactured with good quality and quick turnaround time. PCBWay now could provide a complete product solution, from design to enclosure production. Check out their online Gerber viewer function. With reward points, you can get free stuff from their gift shop. +, <nowiki>ESPNOW communication works based on the MAC address of the nodes. So, we need to find the Mac address of our slave or receiver node. ]For that just upload the following sketch to the ESP32 board and look for the Mac address in the serial monitor.<div class="mw-highlight mw-content-ltr" dir="ltr"><pre>#include "WiFi.h" void setup(){ Serial.begin(115200); WiFi.mode(WIFI_MODE_STA); Serial.println(WiFi.macAddress()); } void loop(){ }</pre></div> Once you uploaded the code, press the EN button and wait for the serial monitor results. It will show you the Mac address. Note that.</nowiki> +, <nowiki>Next, we need to prepare the transmitter, for that use this example sketch which can send multiple data types of data to the particular slave node.<div class="mw-highlight mw-content-ltr" dir="ltr"><pre> // Register peer memcpy(peerInfo.peer_addr, broadcastAddress, 6); peerInfo.channel = 0; peerInfo.encrypt = false; // Add peer if (esp_now_add_peer(&peerInfo) != ESP_OK){ Serial.println("Failed to add peer"); return; } } void loop() { // Set values to send strcpy(myData.a, "I'm alive"); myData.b = random(1,20); myData.c = 1.2; myData.d = false; // Send message via ESP-NOW esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData)); if (result == ESP_OK) { Serial.println("Sent with success"); } else { Serial.println("Error sending the data"); } delay(2000); }</pre></div><blockquote>Note: Change the Mac Address here</blockquote>Here are the serial monitor results, it show sent success but not delivered. Because we don't have the receiver. Let's try to implement the receiver.</nowiki> +, …

Getting Started with TivaWare Launchpad - Basics +

You must check out [https://www.pcbway.com/ PCBWAY] to order PCBs online for cheap! You get 10 good-quality PCBs manufactured and shipped to your doorstep for cheap. You will also get a discount on shipping on your first order. Upload your Gerber files onto [https://www.pcbway.com/ PCBWAY] to get them manufactured with good quality and quick turnaround time. PCBWay now could provide a complete product solution, from design to enclosure production. Check out their online Gerber viewer function. With reward points, you can get free stuff from their gift shop. +, The TivaWare for software development kit (SDK) provides all of the components necessary for engineers to evaluate and develop applications for the Texas Instruments TM4C Arm Cortex - M4F device family. Based on Embedded C language, it allows developers to get started quickly, uses already-tested development methods and drivers that take less time to build and create. In our case, we'll be using a basic microcontroller board TM4C123GXL, which has the same properties as an STM Nucleo Board. TI Boards for this series are termed as 'Launchpad' due to its ability to support other booster drivers and boards that'll give extra support to provide more features. +, This '''Tivaware Launchpad (TM4C123GXL)''' has the following features : * Tiva TM4C123GH6PMI microcontroller * Motion control PWM * USB micro-A and micro-B connectors for USB device, host, and on-the-go (OTG) connectivity * RGB user LED * Two user switches (application/wake) * Available I/O brought out to headers on a 0.1-in (2.54-mm) grid * On-board ICDI * Switch-selectable power sources: – ICDI – USB device * Reset switch * Preloaded RGB quickstart application '''Let us check more about the TM4C123GH6PMMCU :''' * 80MHz 32-bit ARM Cortex-M4-based microcontrollers CPU * 256KB Flash, 32KB SRAM, 2KB EEPROM * Two Controller Area Network (CAN) modules (requires CAN transceivers) * USB 2.0 Host/Device/OTG + PHY * Dual 12-bit 2MSPS ADCs, motion control PWMs * 8 UART, 6 I2C, 4 SPI This board provides more features than any other Arduino Board. What's special about it, is the 32-bit MCU taking control of the board. +, …

Getting Started with Xiao ESP32 S3 Sense +

This project was successfully completed because of the help and support from [https://www.nextpcb.com/pcb-assembly-quote NextPCB.] Guys if you have a PCB project, please visit their website and get exciting discounts and coupons. NextPCB offers high-quality, reliable PCB starting at $1.9, and multilayer starting at $6.9. Also, everyone can enjoy free [https://www.nextpcb.com/pcb-assembly-quote PCB assembly] for 5 boards! Also, NextPCB is having a year end sale in which anyone can register through their website and get a $30 Coupon which can be used for ordering PCBs. You can also try HQDFM free online [https://www.nextpcb.com/free-online-gerber-viewer.html PCB Gerber viewer] to check your PCB design and avoid costly errors. +, <nowiki>The Xiao esp32 s3 sense comes with a detachable OV2640 camera sensor, which can capture images up to 2 megapixels. The camera sensor is connected to the board via a 24-pin FPC cable, which can be easily plugged in or unplugged. The camera sensor can be mounted on the board using the provided screws, or placed anywhere you want using the extension cable. To capture and display images, you need to use the CameraWebServer example sketch from the Arduino IDE. This sketch will create a web server on the Xiao esp32 s3 sense, which will allow you to access the camera stream from any web browser on your local network. You can also take snapshots and save them to the SD card or the flash memory. To use the CameraWebServer sketch, you need to follow these steps: * Open the Arduino IDE and select the Xiao esp32 s3 sense board from the Tools menu. * Go to File > Examples > ESP32 > Camera > CameraWebServer and open the sketch. * In the sketch, find the line that says <code>#define CAMERA_MODEL_AI_THINKER</code> and uncomment it. This will select the correct camera model for the Xiao ESP32 s3 sense. <div class="mw-highlight mw-content-ltr" dir="ltr"><pre>#include "esp_camera.h" #include <WiFi.h> #define CAMERA_MODEL_XIAO_ESP32S3 // Has PSRAM #include "camera_pins.h" // =========================== // Enter your WiFi credentials // =========================== const char* ssid = "ELDRADO"; const char* password = "amazon123"; void startCameraServer(); void setupLedFlash(int pin); void setup() { Serial.begin(115200); while(!Serial); Serial.setDebugOutput(true); Serial.println(); camera_config_t config; config.ledc_channel = LEDC_CHANNEL_0; config.ledc_timer = LEDC_TIMER_0; config.pin_d0 = Y2_GPIO_NUM; config.pin_d1 = Y3_GPIO_NUM; config.pin_d2 = Y4_GPIO_NUM; config.pin_d3 = Y5_GPIO_NUM; config.pin_d4 = Y6_GPIO_NUM; config.pin_d5 = Y7_GPIO_NUM; config.pin_d6 = Y8_GPIO_NUM; config.pin_d7 = Y9_GPIO_NUM; config.pin_xclk = XCLK_GPIO_NUM; config.pin_pclk = PCLK_GPIO_NUM; config.pin_vsync = VSYNC_GPIO_NUM; config.pin_href = HREF_GPIO_NUM; config.pin_sscb_sda = SIOD_GPIO_NUM; config.pin_sscb_scl = SIOC_GPIO_NUM; config.pin_pwdn = PWDN_GPIO_NUM; config.pin_reset = RESET_GPIO_NUM; config.xclk_freq_hz = 20000000; config.frame_size = FRAMESIZE_UXGA; config.pixel_format = PIXFORMAT_JPEG; // for streaming //config.pixel_format = PIXFORMAT_RGB565; // for face detection/recognition config.grab_mode = CAMERA_GRAB_WHEN_EMPTY; config.fb_location = CAMERA_FB_IN_PSRAM; config.jpeg_quality = 12; config.fb_count = 1; // if PSRAM IC present, init with UXGA resolution and higher JPEG quality // for larger pre-allocated frame buffer. if(config.pixel_format == PIXFORMAT_JPEG){ if(psramFound()){ config.jpeg_quality = 10; config.fb_count = 2; config.grab_mode = CAMERA_GRAB_LATEST; } else { // Limit the frame size when PSRAM is not available config.frame_size = FRAMESIZE_SVGA; config.fb_location = CAMERA_FB_IN_DRAM; } } else { // Best option for face detection/recognition config.frame_size = FRAMESIZE_240X240; #if CONFIG_IDF_TARGET_ESP32S3 config.fb_count = 2; #endif } // camera init esp_err_t err = esp_camera_init(&config); if (err != ESP_OK) { Serial.printf("Camera init failed with error 0x%x", err); return; } sensor_t * s = esp_camera_sensor_get(); // initial sensors are flipped vertically and colors are a bit saturated if (s->id.PID == OV3660_PID) { s->set_vflip(s, 1); // flip it back s->set_brightness(s, 1); // up the brightness just a bit s->set_saturation(s, -2); // lower the saturation } // drop down frame size for higher initial frame rate if(config.pixel_format == PIXFORMAT_JPEG){ s->set_framesize(s, FRAMESIZE_QVGA); } // Setup LED FLash if LED pin is defined in camera_pins.h #if defined(LED_GPIO_NUM) setupLedFlash(LED_GPIO_NUM); #endif WiFi.begin(ssid, password); WiFi.setSleep(false); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); startCameraServer(); Serial.print("Camera Ready! Use 'http://"); Serial.print(WiFi.localIP()); Serial.println("' to connect"); } void loop() { // Do nothing. Everything is done in another task by the web server delay(10000); } </pre></div> * In the sketch, find the line that says <code>const char* ssid = "your-ssid";</code> and replace <code>your-ssid</code> with the name of your Wi-Fi network. Do the same for the line that says <code>const char* password = "your-password";</code> and replace <code>your-password</code> with the password of your Wi-Fi network. * Upload the sketch to the Xiao esp32 s3 sense and open the serial monitor. You should see the IP address of the web server, such as <code>http://192.168.1.100</code>. * Open any web browser on your computer or smartphone and enter the IP address of the web server. You should see the camera stream and some buttons and options on the web page. </nowiki> , The xiao esp32 s3 sense can capture images at different resolutions, ranging from 160x120 to 1600x1200. You can change the resolution from the web page by selecting one of the options from the drop-down menu. The higher the resolution, the better the image quality, but the slower the frame rate and the more memory usage. You can also change the orientation of the camera from the web page by clicking on the buttons that say “Flip” or “Rotate”. The flip button will flip the image horizontally, while the rotate button will rotate the image 90 degrees clockwise. +, …

Glowing LED Butterfly +

Use TinkerCad to design the component that will be 3D printed. This is a great opportunity to develop your computer aided design (CAD) skills! What to think about.. - Needs to have holes for the light to go through - Needs to be big enough to hide the Arduino and PCB - Needs to be able to sit on the top of the 9V battery Pre-made butterfly design can be found through this link +, Save and download your design as a .stl and upload into your printer software. Slice your design, making sure you pay attention to the printer settings. Things to think about.. - Is the highest quality necessary for this print? - How could you save time on the printing? - How could you save material on this print? - Are supports needed anywhere? Do you have any large amounts of overhang? - Should you add a raft to help with the removal of the print from the machine? Upload onto a SD card or USB stick (depending on your printer) and hit print! +, Set up a temporary circuit using a bread board and solderless jumper cables. Set up your circuit as shown in the diagram Things to note: - There is a transistor for each of the Red, Blue and Green inputs of the RGB strip - Each transistor has 3 pins, one for GROUND, one for SIGNAL INPUT and one for SIGNAL OUTPUT - The signal input pin of each transistor is connected to a pin on the Arduino board which will be controlled by the Arduino code - this will tell it when this colour should illuminate or not. - The signal output pin of each transistor is connected to the corresponding connection on the RGB strip. - The Vin pin from the Arduino is connected to the 12V+ connection point on the RGB strip. This means that the power source is coming the computer when it is connected rather than a battery +, …

Google Professional-Cloud-DevOps-Engineer Practice Test Questions 2024 +

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Graver des surfaces avec Inkscape et une CNC +

On voit le Z min et max qui doivent correspondre à la profondeur et à la hauteur de sécurité, pondéré du facteur "Scale along Z axis" de "Zone/Options". +, Défini le XY 0,0 et la profondeur Z * Z depth: profondeur total de la gravure, toutes passes confondues Attention: "Scale along Z axis" dans Option est un facteur qui sera aussi appliqué. Voir EXEMPLE plus bas +, Set tool shape. Ajoute un encart éditable (diametre...) Déplacer le nouveau cadre. Editer dedans: * diameter, la taille de l'outil * feed: la vitesse XY, par exemple 50 pour une vitesse lente de test * depth step: le nombre de mm entre 2 passes EXEMPLE: OP "Z depth" = 1.1mm, "depth step" = 0.3. Il y aura 3 passes de 0.3mm + 1 passe de 0.2mm pour faire 1.1 mm Mais, si "Scale along Z axis" de Zone/Options est à 3, il y aura 3 passes de 0.9mm + 1 passe de 0.6mm pour faire 3.3 mm +, …

Gravograph - Mode d'emploi au fab-c +

Démarrer le programme en cliquant sur l'icône GS 8 Laser mode +, Indiquer les dimensions de votre plan de travail. Régler les marges, s'il y en a. Valider (V vert) quand tout est correct +, Img1 - Cliquer sur le cadenas afin de libérer le déplacement en dehors du plan de travail Img2 - Cliquer sur LASERSTYLE (bouton vert) pour faire apparaître le menu correspondant Img3- Cliquer sur Importer pour charger votre fichier Img4 - Si votre fichier n'apparaît pas, changer le 'Types de fichiers" avec l'extension voulu Img5 - La fenêtre "Options Import s'ouvre. Valider. '''Img6 - Le fichier est importé''' +, …

Gravure Standard +

Sur Adobe Illustrator réaliser une illustration/dessin (ou alors vectoriser une image existante) +, Avant d'avant registrer : Vérifier que la taille par rapport au support Vérifier les couleurs RVB (Noir gravure 0/0/0) Enregistrer votre dessin : En Adobe PDF +, Ouvrez le PDF dans Acrobat Reader ou votre lecteur PDF par défaut Imprimez comme pour une imprimante classique Vérifier la destination : Trotec Engraver Vérifier la taille : Taille réelle Vérifier l'orientation Puis aller dans le paramétrage d'impression +, …

Gravure de la Coupe Stanley +

# '''Nettoyer la surface :''' Essuyez la tasse avec de l'alcool isopropylique pour éliminer les traces de doigts, les traces de gras ou la poussière. Une surface propre permet une gravure laser plus uniforme. # '''Mesurez votre zone de gravure :''' utilisez une règle ou un pied à coulisse numérique pour mesurer l'espace disponible pour votre motif. La plupart des coupes Stanley ont une surface incurvée ; il est donc essentiel de connaître la largeur et la hauteur de votre gravure. # '''Installation de l'accessoire rotatif :''' Installez votre outil rotatif conformément au manuel de votre graveur laser. La coupelle doit être bien ajustée entre les rouleaux ou les mandrins sans glisser pendant la rotation. # '''Mise à niveau de la tasse :''' assurez-vous que la partie de la tasse à graver est à niveau avec le faisceau laser. Vous devrez peut-être lever ou abaisser le rotor pour obtenir la bonne hauteur. +, Pour graver une coupe Stanley, privilégiez les motifs simples et audacieux. Les lignes fines et les détails complexes peuvent se perdre sur les surfaces courbes. Par conséquent : * Privilégiez des polices de caractères fortes et claires pour le texte * Utiliser des illustrations vectorielles pour les logos ou les graphiques * Évitez les motifs avec des ombrages importants ou des remplissages complexes '''Conseil :''' si vous n'êtes pas sûr de la taille, créez d'abord un gabarit en papier. Enroulez-le autour de la tasse pour visualiser l'ajustement de votre motif. +, # '''Importez le fichier :''' ouvrez votre logiciel de gravure (tel que LightBurn) et téléchargez votre conception. # '''Ajustez la taille :''' Redimensionnez votre motif en fonction de vos mesures précédentes. Assurez-vous qu'il s'adapte parfaitement à la zone de gravure sans trop entourer la tasse. # '''Positionnement du motif :''' Alignez votre motif horizontalement pour une rotation régulière pendant la gravure. Certains logiciels proposent un mode rotatif pour vous aider à configurer correctement ce mode. # '''Miroir de l'image (si nécessaire) :''' selon vos paramètres rotatifs, vous devrez peut-être refléter l'image horizontalement pour qu'elle soit gravée dans la bonne direction. +, …

Gravure litctenberg +

Couper les 2 gros fils rouge +, Brancher le primaire 220v avec une prise (récupéré sur le micro onde) brancher le secondaire avec des fils avec des pinces 1 fil sur la bobine du secondaire le 2ème sur la masse du transformateur +, Démonter le transformateur, faire attention au condensateur le décharger avant le démontage, mettre en contact les 2 bornes du condensateur +, …

Gravure photo en 3 étapes et l'option relief +

Aprés avoir choisit l'image qui sera gravée, il faut la préparer en amont. C'est à dire retirer le fond de l'image si on ne souhaite pas le graver par exemple. Il y a des applications en ligne gratuite qui le font plus ou moins bien. Si le résultat ne convient pas, passez par un logiciel de photo montage. Pour améliorer le contraste de l'image, je régule le niveau des blancs et des noirs. L'image convenant, on l'enregistre en jpeg par exemple pour pouvoir l'utiliser dans Inkscape +, L'application Inkscape ouverte, importer la ou les images/photos du projet. A cette étape, on va déterminer les lignes de coupes et de marquages qui seront appliquées par la découpeuse laser. N'oubliez pas que la découpeuse laser utilise un code couleur de priorité pour les découpes! Après la gravure de tout ce qui est en noir (image, photo, ligne mais aussi les défauts noirs de l'image non corrigés), elle "découpe" les motifs vert, puis rouge et enfin le bleu. Il est recommandé que l'odre des découpes se fassent de l'intérieur de l'objet vers l'extérieur. Car si le contour extérieur de l'objet est découpé avant les lignes internes, l'objet peut bouger (même de quelques milimètres) et donc faire des découpes internes érronées. En sachant tout celà, il faut appliquer le code couleur à notre dessin. Pour créer rapidement le contour de mon objet, il faut: -sélectionner l'objet/photot -allez dans l'onget "Chemin" --> "Vectoriser un objet matriciel" (Maj+Alt+B) -pour des contours précis (dans le cadre d'une photo), je choisis "Multicolor" au lieu de "Une seule passe". Grace à l'aperçu à droite, on peut choisir quelle est la meilleur détection -pour le nombre de Passes, il vaut mieux choisir un nombre élevé pour la précision des contours et des points. -Cochez les cases Adoucis , empilement et retirer l'arrère-plan, et cliquer sur "appliquer" -cliquez en dehors de l'image -avec l'outil de sélection, dessiner un cadre de sélection autour de l'image que l'on vient de travailler. -Allez dans l'onglet "Chemin" ---> sélectionner "séparer", puis "combiner" puis"union". Notre objet est devenu entièrement noir. si ce n'est pas le cas et qu'il y a des zones avec des "trous", il faut recommencer : avec l'outil de sélection, dessiner un cadre de sélection autour de l'image que l'on vient de travailler; Allez dans l'onglet "Chemin" ---> sélectionner "séparer", puis "combiner" puis"union". -sélectionner l'objet noir, allez dans l'onglet "Objet" et selectionner "Fond et contour" C'est à partir de cette étape que l'on va déterminer l'odre de travail de la découpeuse laser, quelque soit l'objet travaillé. Dans notre cas, on veut que le contour soit découpé et l'intérireur gravé. Si on laisse comme ça, on aura juste un gros trou noir. Donc pour le fond, on décoche la case ou on coche le X en début des choix de fond. Notre photo réapparait. On va dans le sous-onglet "contours". Là, on choisit la couleur de découpe par rapport au reste du projet. Si cette photo est la seule chose que l'on veut couper, on peut attribuer la couleur rouge (R=255) ou bleu (B=255). , La découpeuse laser utilise l'application Ruby (dans mon cas). Je rencontre souvent des problèmes/anomalie lors de l'importation de mon projet inkscape par rapport à l'image ou le texte (tout le monde n'a pas les mêmes polices de caractères). Pour palier à ces soucis, j'enregistre mon projet sous 2 formats : svg (format inkscape) et en pdf (quand il y a du texte). Pour les parametres en PDF, il ne faut pas oublier de cocher la case "convertir les textes en chemins". Sans cette option, les lignes de découpes ne seront pas prises en compte. +, …

Gravure sur galet +

Pour obtenir un effet de dégradé naturel du motif sur la totalité du galet et pour ne pas faire flamber votre martyr , il vous faut que : - les dimensions de votre fichier dépassent un peu celle du galet - le motif soit en dégradé afin que les bords frôlent la transparence. Vous pouvez choisir le motif que vous voulez (la moquette de Shining ici) mais tenez compte de la texture de la pierre. Des dessins fins sur un galet très granuleux peuvent perdre en lisibilité. Une fois votre dessin près à l'impression, envoyé le dans JobControl. +, <div class="icon-instructions caution-icon"> <div class="icon-instructions-icon"></div> <div class="icon-instructions-text">Puisque votre gravure débordera du galet, il vous faut un martyr pour protégé votre nid d'abeille. La pierre demande une forte puissance de gravure, tenez en compte dans le choix du martyr. Le CTP et carton bois 3mm sont à proscrire. Le mieux ici à été du PMMA 3mm.</div> </div> * Positionnez votre galet sur le martyr en le calant avec une matière molle. J'ai choisi la pâte à modeler et fait 2 plots pour mettre à niveau ma pierre. Cela stabilisera aussi votre pierre durant la gravure. * Positionnez l'ensemble martyr/galet sur le nid d'abeille. * Faites la focalisation avec la pige. * Placez le faisceau laser au centre (enfin au plus près) de votre galet. +, * Centrez votre job sur le curseur (lui même centré sur le galet) de la laser * Réglez vos paramètres de gravure. * Lancez votre gravure et patientez ! Pour attaquer la pierre, la vitesse de déplacement du laser est plutôt lente. Donc la gravure peut être longue en fonction de la dimension du motif. Celle ci a duré presque 1h. <div class="icon-instructions caution-icon"> <div class="icon-instructions-icon"></div> <div class="icon-instructions-text">Risques de combustion du martyr, c'est une gravure à surveiller attentivement pour stopper au moindre départ de flammes !</div> </div> +

Gravure sur lino +

En linogravure, on creuse dans la plaque de lino autour des éléments qu'on veut imprimer pour les faire ressortir en relief. Nous allons recréer ce procédé avec la découpeuse laser. Du coup, il faut passer en négatif l'image souhaitée. Pour cela, dans Photoshop, on ouvre notre image de scarabée qui est sur fond blanc. Ensuite on va dans "Image > Réglages > Négatif". Ainsi, notre scarabée noir sur fond blanc devient un scarabée blanc sur fond noir. Il ne reste plus qu'à enregistrer le fichier en .jpg. Comme la découpeuse laser grave ce qui est en noir et ne grave pas ce qui est en blanc, elle va creuser tout autour de notre scarabée, le laissant ainsi en relief. +, Une fois sur le logiciel Laserbox, allez dans le petit menu en haut à gauche puis cliquez sur "Importer". Récupérez votre image en négatif. Nous avons fait plusieurs tests de réglages jusqu'à ce que cela nous semble convenable pour imprimer sur de la terre. Nous avons utilisé du lino gris (la souplesse n'est pas la même en fonction de la couleur). Les réglages qui nous ont semblé le mieux sont : * Puissance : 35% * 85mm/seconde * Passe : 1 Dans les paramètres avancés nous avons réglé l'acuité sur 100% afin d'avoir le plus de détails possible dans notre gravure. +, C'est cuit ! Vous n'avez plus qu'à découper votre petit morceau de lino et tester votre motif dans la terre. Cela n'a rien à voir avec le procédé, mais il faut avoir en tête que si vous souhaitez graver un petit motif il faudra prévoir que ce dernier n'ai pas trop de détails car sinon l'image n'est plus lisible. +