{"title":"Home page","description":"","products":[{"product_id":"automatic-window-opener","title":"GlassCalibur","description":"\u003ch2\u003eThe GlassCalibur: Automated Window Opener\u003c\/h2\u003e\n\u003cp\u003eGlassCalibur is a smart window opener that opens and closes your windows. \u003cstrong\u003eIt only works with ESPHome at this time. So please be sure you know how to use ESPHome before purchasing.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eUse Cases\u003c\/h2\u003e\n\u003cp\u003eHome automation is where this device shines. \u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e1. Use an indoor air quality sensor (like an Awair) to trigger the window to air out the room\u003cbr data-mce-fragment=\"1\"\u003e2. Check Purple Air sensors hourly and close your windows when bad outdoor air is detected\u003cbr data-mce-fragment=\"1\"\u003e2. Measure indoor and outdoor temperatures and cool your room when necessary\u003cbr data-mce-fragment=\"1\"\u003e3. Check weather APIs if it's raining to open\/close your window\u003cbr data-mce-fragment=\"1\"\u003e4. Set a schedule to listen to the morning birds chirp\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSafety features\u003c\/h2\u003e\n\u003cp\u003eSafety is the primary concern with this device. \u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eIn case of emergencies, the entire device can be instantly removed from your window. (see GIF above)\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/hand-gif_480x480.gif?v=1629591622\" data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eIn case an object or limb gets in the way during window operations, the device will automatically stop and save its location. \u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eIn the event that you leave the window locked, the device will automatically detect a locked window and stop the motor.\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eIs your window too heavy?\u003c\/h2\u003e\n\u003cp\u003eThe motor has been tested to move up to 40 lbs. However, this is extremely heavy and may cause problems. If your window is this heavy, lubricate it with dry silicone spray and check if that helps.\u003c\/p\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eHow to install it\u003c\/h2\u003e\n\u003cp\u003eInstallation is \u003cstrong\u003esuper easy\u003c\/strong\u003e. The total install time is just a few minutes. Attach 2 mounts, wait 24 hours for the adhesives to build some strength, and start using.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThere are 2 mounts that are attached with adhesive. If necessary, you can also use a screw into the sill, but that has been required. \u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eFirst, attach the window mount. Next, attach the sill mount.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWait 24 hours for the adhesives to set and you can now use the window opener.\u003c\/p\u003e","brand":"VALAR Systems","offers":[{"title":"Default Title","offer_id":39590892208187,"sku":"","price":179.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/1_71a1c0a9-3c23-468f-bb04-54a27f4b3903.jpg?v=1773876875"},{"product_id":"val3000","title":"VAL3000: WiFi Stepper Motor Controller","description":"\u003cp\u003eThe VAL3000 is the easiest, fastest, cheapest, safest, and most wireless way to spin a stepper motor. \u003c\/p\u003e\n\u003cp\u003eYou can precisely control a motor's distance, speed, current, and stall characteristics within minutes of receiving it. \u003c\/p\u003e\n\u003cp\u003eIf you want to program it yourself, you can find the GitHub code \u003ca rel=\"noopener\" href=\"https:\/\/github.com\/Valar-Systems\/VAL3000\" target=\"_blank\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe VAL3000 contains the following components in a very small package:\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEspressif ESP32-C3\u003c\/li\u003e\n\u003cli\u003eTrinamic TMC2209 motor driver with StallGuard and StealthChop\u003c\/li\u003e\n\u003cli\u003eSynchronous DC\/DC converter\u003c\/li\u003e\n\u003cli\u003eThree button inputs\u003c\/li\u003e\n\u003cli\u003eEnd stop connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eESPHome for Everyone\u003c\/h2\u003e\n\u003cp\u003eThe firmware has been updated! The device now ships with ESPHome already installed, it does not require Home Assistant or any uploading or flashing of firmware. Once powered on, it creates a Wi-Fi hotspot which you connect to with your phone or laptop. Then you add the device to your network and can access the settings from any browser on the same network. It will be discoverable in Home Assistant for automation, but it can also function without it. \u003c\/p\u003e\n\u003ch2\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDetailed Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eESP32-C3\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConnect the ESP32 to Wi-Fi and wirelessly control it.\u003c\/p\u003e\n\u003ch4\u003eTrinamic TMC2209\u003c\/h4\u003e\n\u003cp\u003eThe Trinamic TMC2209 is one of the best stepper motor drivers on the market. It is very feature-rich while being affordable. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eEasily program from the ESP32 via USB\u003c\/p\u003e\n\u003cp\u003eIncludes the extremely popular and useful StallGuard feature. Easily set it to stop whenever the force on your motor exceeds a certain force. This makes it very safe to use for all types of projects. \u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCustomizable Stepper Motor Connector\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYou can connect a motor in three ways. The board has a 4-pin JST XH plug. Additionally, it has the 4 pins exposed and comes with a 4-pin screw terminal, like below. You can solder your motor wires directly to the board or solder this screw terminal.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/ezgif.com-gif-maker_240x240.jpg?v=1657599036\"\u003e\u003c\/div\u003e\n\u003ch4\u003eUSB-C Port\u003c\/h4\u003e\n\u003cp\u003eEasily flash the firmware using the USB-C port. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eThree Buttons\u003c\/h3\u003e\n\u003cp\u003eSometimes it's nice to press a button to open or close your device. That's why we've included three buttons to do just that. The MorningRope uses the top two buttons to open\/close and the bottom button to reset the WiFi.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eStepper Motor\u003c\/h4\u003e\n\u003cp\u003eConnect any 4-Wire Bipolar stepper motor\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eOn-Board Voltage Regulator\u003c\/h4\u003e\n\u003cp\u003eThe 1A Synchronous DC\/DC converter provides ultra-high efficient voltage regulation in a compact design. \u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eESP32-C3\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eThis ESP32-C3 sits at the heart of the board. Its low-cost to high-performance ratio is unlike any other. It provides stepper motor control as well as maintains the wireless connection for WiFi and MQTT access.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"VALAR Systems","offers":[{"title":"Default Title","offer_id":40602586218555,"sku":"","price":34.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/VAL3000_2.jpg?v=1772466310"},{"product_id":"controlling-trinamic-drivers-pdf","title":"Controlling Trinamic Drivers PDF","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThis is a digital PDF that includes Arduino code. You will receive a link in your email to download the PDF after purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is a 50 page guide to understanding the basic and advanced features of Trinamic stepper motors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTrinamic makes some of the most popular and widely used stepper motor drivers in the world. They can be found in millions of 3D printers that are increasingly being used in all types of advanced motion control applications.\u003cbr\u003e\u003cbr\u003eHowever, what makes them so powerful also makes them complex. In this guide, I will teach you to everything you need to know to use the Trinamic TMC2209 stepper motor driver in the Arduino IDE.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"a-text-bold\"\u003eArduino example code included!\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003eYou'll learn the following:\u003c\/span\u003e\u003c\/p\u003e\n\u003col class=\"a-ordered-list a-vertical\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eHardware requirements\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eWhat to look for in your hardware\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eBasics of stepper motors\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eStepper motor power requirements\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eHow to program the TMC2209 in Arduino\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"a-list-item\"\u003eIncluding the following advanced topics:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"a-ordered-list a-vertical\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eHow to use StallGuard\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eDual-core and single-core operation\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eFinite state machine example\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Valar Systems","offers":[{"title":"Default Title","offer_id":41923548872763,"sku":"","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/TrinamicBookCover_1200x1200px.jpg?v=1734366820"},{"product_id":"minispeedcam","title":"MiniSpeedCam","description":"\u003cul\u003e\n\u003cli\u003eLearn more on the \u003ca href=\"https:\/\/github.com\/Valar-Systems\/MiniSpeedCam\" target=\"_blank\" rel=\"noopener\"\u003eGitHub page\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompletely open-sourced\u003c\/li\u003e\n\u003cli\u003eSD card not required\u003c\/li\u003e\n\u003cli\u003eEasy to reprogram the ESP32 and STM32\u003c\/li\u003e\n\u003cli\u003eOptional external antenna for long-distance WiFi\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Valar Systems","offers":[{"title":"Default Title","offer_id":42517431582779,"sku":null,"price":49.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/12_9b924e5e-3c4c-4342-94cc-2a96130f10a3.jpg?v=1761753296"},{"product_id":"val3100-thread-wifi-stepper-motor-controller","title":"VAL3100: WiFi\/Thread\/Zigbee Stepper Motor Controller","description":"\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This device, the VAL3100, has the ESP32-C6 which has a WiFi\/Thread\/Zigbee radio. The VAL3000 uses the ESP32-C3 which only has a WiFi radio.\u003c\/p\u003e\n\u003cp\u003eThis device is great for low power and battery applications. The ESP32-C6 can use Thread or Zigbee to save on power. ESPHome will allow you to use Thread. \u003c\/p\u003e\n\u003cp\u003eAdditionally, it uses a synchronous DC\/DC converter, which is the most efficient type of DC\/DC converter, achieving up to 95% efficiency when stepping the voltage down to 3.3V for the IC. \u003c\/p\u003e\n\u003cp\u003eIf you want to program it yourself, you can find the GitHub code \u003ca href=\"https:\/\/github.com\/Valar-Systems\/VAL3000\" rel=\"noopener\" target=\"_blank\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe VAL3100 contains the following components in a very small package:\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEspressif ESP32-C6\u003c\/li\u003e\n\u003cli\u003eTrinamic TMC2209 motor driver with StallGuard and StealthChop\u003c\/li\u003e\n\u003cli\u003eSynchronous DC\/DC converter\u003c\/li\u003e\n\u003cli\u003eThree button inputs\u003c\/li\u003e\n\u003cli\u003eEnd stop connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDetailed Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eESP32-C6\u003c\/p\u003e\n\u003cp\u003eConnect the ESP32-C6 to Thread or Wi-Fi and wirelessly control it.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTrinamic TMC2209\u003c\/h4\u003e\n\u003cp\u003eThe Trinamic TMC2209 is one of the best stepper motor drivers on the market. It is very feature-rich while being affordable. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eEasily program from the ESP32 via USB\u003c\/p\u003e\n\u003cp\u003eIncludes the extremely popular and useful StallGuard feature. Easily set it to stop whenever the force on your motor exceeds a certain force. This makes it very safe to use for all types of projects. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eCustomizable Stepper Motor Connector\u003c\/h4\u003e\n\u003cp\u003eYou can connect a motor in three ways. The board has a 4-pin JST XH plug. Additionally, it has the 4 pins exposed and comes with a 4-pin screw terminal, like below. You can solder your motor wires directly to the board or solder this screw terminal.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch4\u003eUSB-C Port\u003c\/h4\u003e\n\u003cp\u003eEasily flash the firmware using the USB-C port. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eThree Buttons\u003c\/h3\u003e\n\u003cp\u003eSometimes it's nice to press a button to open or close your device. That's why we've included three buttons to do just that. The MorningRope uses the top two buttons to open\/close and the bottom button to reset the WiFi.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eStepper Motor\u003c\/h4\u003e\n\u003cp\u003eConnect any 4-Wire Bipolar stepper motor\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eOn-Board Voltage Regulator\u003c\/h4\u003e\n\u003cp\u003eThe 1A Synchronous DC\/DC converter provides ultra-high efficient voltage regulation in a compact design.\u003c\/p\u003e","brand":"VALAR Systems","offers":[{"title":"Default Title","offer_id":43248782934075,"sku":null,"price":44.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/VAL3100.jpg?v=1772466224"},{"product_id":"ropener","title":"The Ropener","description":"\u003cp\u003eThe Ropener is a smart curtain opener that retrofits onto your existing curtain rod to make it smart and easy to open remotely. Watch the video in the gallery to learn more.\u003c\/p\u003e\n\u003ch2\u003eChoose your kit\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDIY (no prints):\u003c\/strong\u003e all hardware and electronics — you print the plastic parts yourself from the open-source files. The lowest-cost option for makers with a 3D printer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDIY (with prints):\u003c\/strong\u003e the same kit with the full printed set included, so you don't need a printer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled — Ready to Use:\u003c\/strong\u003e fully built and tested, ready to mount.\u003c\/p\u003e\n\u003cp\u003eBoth DIY tiers assemble in about 20 minutes once you have the printed parts.\u003c\/p\u003e\n\u003ch2\u003ePower\u003c\/h2\u003e\n\u003cp\u003eSelect \u003cstrong\u003eUS\u003c\/strong\u003e, \u003cstrong\u003eEU\u003c\/strong\u003e, or \u003cstrong\u003eUK\u003c\/strong\u003e to include a 24V\/1.5A power supply with the right plug, or \u003cstrong\u003eNone\u003c\/strong\u003e to supply your own 24V\/1.5A adapter.\u003c\/p\u003e\n\u003ch2\u003eRope length\u003c\/h2\u003e\n\u003cp\u003e30 ft is enough for most installs. Choose 40 ft or 50 ft only if your run needs it — see \u003cem\u003eChoosing your rope length\u003c\/em\u003e below for the sizing math.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWorks for everyone\u003c\/h2\u003e\n\u003cp\u003eThe device ships with ESPHome already installed — it does not require Home Assistant or any uploading or flashing of firmware. Once powered on, it creates a Wi-Fi hotspot that you connect to with your phone or laptop. Then you add the device to your network (2.4 GHz Wi-Fi) and can access the settings from any browser on the same network. It will be discoverable in Home Assistant for automation, but it can also function without it.\u003c\/p\u003e\n\u003ch2\u003e100% open source\u003c\/h2\u003e\n\u003cp\u003eEverything is open source. The plastics are 3D printed, and STEP files are available. The firmware is written in ESPHome with the YAML available here:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/Valar-Systems\/Ropener\" title=\"https:\/\/github.com\/Valar-Systems\/Ropener\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ehttps:\/\/github.com\/Valar-Systems\/Ropener\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eIf you chose \u003cstrong\u003eDIY (no prints)\u003c\/strong\u003e, this is where the print files live.\u003c\/p\u003e\n\u003ch2\u003eBuilding it\u003c\/h2\u003e\n\u003cp\u003eBuild guide is \u003ca href=\"https:\/\/youtu.be\/uowt6jLxNso\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eInstallation guide is \u003ca href=\"https:\/\/youtu.be\/p8078ezLZHw\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/valar-downloads.s3.amazonaws.com\/Main+Thingiverse+(1).gif\"\u003e\u003c\/p\u003e\n\u003ch2\u003eESPHome\u003c\/h2\u003e\n\u003cp\u003eESPHome YAML is available \u003ca href=\"https:\/\/github.com\/Valar-Systems\/Ropener\/tree\/main\/firmware\" rel=\"noopener\" target=\"_blank\"\u003ehere\u003c\/a\u003e. If you use \u003ca rel=\"noopener\" href=\"https:\/\/github.com\/Luligu\/matterbridge\" target=\"_blank\"\u003eMatterbridge\u003c\/a\u003e, you can even control this device with Apple Home, Google Home, and Alexa.\u003c\/p\u003e\n\u003ch2\u003eBefore you buy\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLead time:\u003c\/strong\u003e ships in 1–2 weeks — sorry for the delay.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrommet curtains:\u003c\/strong\u003e we highly recommend using \u003ca rel=\"noopener\" href=\"https:\/\/amzn.to\/4sAUIfs\" target=\"_blank\"\u003ethis curtain glide tape\u003c\/a\u003e. Without it, most grommet curtains get stuck halfway when closing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3D prints:\u003c\/strong\u003e choose \u003cstrong\u003eDIY (no prints)\u003c\/strong\u003e to print your own — everything prints on one platter in about 9 hours (8h 44m), with the files on the GitHub page — or choose \u003cstrong\u003eDIY (with prints)\u003c\/strong\u003e to have the full set included.\u003c\/p\u003e\n\u003ch2\u003eWill it work for your curtains?\u003c\/h2\u003e\n\u003cp\u003eThere's no maximum width — the motor can pull any length of rope. The one real limit is pulling force: up to about 15 lb. That's not about how much your curtains weigh, but how hard they are to slide along the rod — and longer, heavier, or stiffer curtains create more drag. Most curtains sit well within range. If yours are wide or heavy, the glide tape (above) cuts that drag substantially and is the fix, especially on grommet curtains.\u003c\/p\u003e\n\u003ch2\u003eChoosing your rope length\u003c\/h2\u003e\n\u003cp\u003eThe rope needs to be at least twice as long as the distance it needs to travel, plus some distance for it to attach to the wall, below the curtains. For example, if your curtain rod is 10 feet wide, you need at least 20 feet of rope. Additionally, we recommend placing it 2 feet below the curtain, which will require an additional 4 feet of rope. So a 10-foot rod needs at least 24 feet of rope. \u003cstrong\u003e30 ft covers most setups;\u003c\/strong\u003e size up to 40 ft or 50 ft for wide spans or a low mount point.\u003c\/p\u003e\n\u003ch2\u003eHow it works\u003c\/h2\u003e\n\u003cp\u003eThe diagram below shows how the rope moves the curtain. It's from an earlier revision, but the mechanism is identical.\u003c\/p\u003e\n\u003cp\u003eThe motor is attached below #4, and a pulley spins the rope. On the opposite end is the end pulley #1. In the center are the two carriages #2 and #3 that are attached to the rope. These are attached to the front of each curtain panel and move it back and forth along the rod.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0048\/6244\/3590\/files\/String_Setup_480x480.jpg?v=1621893011\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e","brand":"VALAR Systems","offers":[{"title":"DIY (no prints) \/ None (BYO) \/ 30 ft","offer_id":43711519424571,"sku":"ROP-K-BYO-30","price":59.97,"currency_code":"USD","in_stock":true},{"title":"DIY (no prints) \/ None (BYO) \/ 40 ft","offer_id":43711519457339,"sku":"ROP-K-BYO-40","price":62.97,"currency_code":"USD","in_stock":true},{"title":"DIY (no prints) \/ None (BYO) \/ 50 ft","offer_id":43711519490107,"sku":"ROP-K-BYO-50","price":65.97,"currency_code":"USD","in_stock":true},{"title":"DIY (no prints) \/ US plug \/ 30 ft","offer_id":43711519522875,"sku":"ROP-K-US-30","price":68.97,"currency_code":"USD","in_stock":true},{"title":"DIY (no prints) \/ 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