Laser diode driver schematicPekerjaan

Hi Travis, are you still interested in taking freelancer projects. I have a relatively some idea that I would like to make into reality, and your cad skills are far better than mine. The projects is to design an automotive interior trim price that will be constructed from laser cut sheet metal. Lmk if you have the time and I can put together more details.

I'm looking for an experienced PCB designer who can help me with a medium-sized, single-layer PCB. The project requires both layout and schematic design. Key Requirements: - Expertise in PCB Design: The ideal candidate should have a strong track record in PCB design, particularly in single-layer designs. Previous experience with medium-sized PCBs would be a plus. - Proficiency in Design Software: Proficiency in popular PCB design software like Altium, Eagle, or KiCad is essential. - Attention to Detail: A keen eye for detail is crucial for this project to ensure the layout and schematic are accurate and optimized. If you're confident in your PCB design skills and believe you can deliver a high-quality, single-layer PCB design, I'd love to hear from you. Plea...

I'm in need of some assistance in developing the prototype schematic for an Embedded ESP32-C3FH4. ***This is for integration in an existing device that is currently utilizing a ESP32-C3 Supermini Dev Board Key functionalities should include: - Bluetooth connectivity - GPIO pins configuration - ADC Input - USB-C Female Plug - Serial TX and RX IO - Ten (10) GPIO functionalities This blueprint will serve as the basis of a prototype I am developing. As such, I'm seeking to partner with someone who is experienced and proficient in the following areas: ESP32-C3FH4 development and configuration including the following features: - Bluetooth connectivity - GPIO pins configuration - ADC Input systems - USB-C connection. - Serial Comms Please ensure your proposal reflects your...

We have a Problem to update our shop. We got in the SSH Terminal the following Error: ! Warning: Failed to load plugins. Message: An exception occurred in the driver: could not find driver !! PHP Fatal error: Class ShopwareCoreMigrationV6_5Migration1694426018AddEntityIndexToStateMachineHistory contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (ShopwareCoreFrameworkMigrationMigrationStep::updateDestructive) in /var/www/vhosts/***-****.de/httpdocs/vendor/shopware/core/Migration/V6_5/ on line 13

We have a package delivery company with a website built in .php where our users can book pickup and delivery of packages. Now we want to build an extra function where the user can see where the package is. For this reason we need a very very simple application for our driver to just start up for tracking, no other functions needed for now. And the data will be sent to our database for our website where we show everything on a map.

...and should be capable of offering a variety of payment methods for rides, including credit card, PayPal, Venmo, Zelle, Cash App and cash. Key Features: - User Registration and Login: Users should be able to create accounts, log in easily, and manage their profile information. - Ride Request and Booking: The app should allow users to request a ride and offer a price, see drivers bids, and pick a driver and book their ride. They will be able to schedule a future ride as well. - Drivers will be able to bid on jobs, or accept a customers price. - Drivers and customers will both be able to use the estimated price tool as a suggestion for the going rates and base their prices on that if they want. - GPS Tracking and Navigation: GPS features should be integrated for both drivers and p...

...app will be available across both iOS and Android platforms. Key Requirements: - Aesthetic: The design should be simple and clean. It should have an easy-to-navigate user interface and a straightforward booking process. - Features: The core feature of this app is live tracking. It should also include: * An efficient in-app payment system to allow for seamless transactions. * A robust driver and rider rating system to ensure trust and safety within the community. * Effective push notifications to keep riders updated about their rides. Desired Skills: - Extensive experience in mobile app development, particularly in iOS and Android platforms - Proven track record in developing similar taxi/transportation apps - Strong knowledge in integrating payment gateways, gen...

I'm in need of an electronics professional who can convert my detailed Arduino connections into a clean, organized schematic diagram. - You will work on the Digital input/output pins, Analog input pins, Power supply connections, literally all connections of my Arduino setup. Essential Skills and Experience: - Knowledge of Arduino - Proficiency in creating schematic diagrams - An eye for detail, and great organizational skills. A schematic will help us represent my setup visually. Our goal is to have a convenient direction for future referencing. In your bid, please include examples of similar work you've done in the past.

...someone skilled in Adobe Illustrator to create custom label templates, complete with variables for laser engraving. Here's what you need to know: - The templates will be used for creating labels that will be engraved using a laser - The design of the label should be typically rectangle in shape (eg. 10mm wide x 8mm high) - The content within the label is variable, meaning it will change from job to job - Due to the nature of the engraving process, a strong knowledge of setting variables within Illustrator is crucial The ideal freelancer for this job: - Is highly experienced in Adobe Illustrator - Has prior experience creating variable templates - Possess solid understanding of preparing files for laser engraving process We would like basic instructions provi...

I'm looking for a talented web designer/developer to revamp my Wordpress website. The primary goal of this redesign is to increase online sales, so a strong focus on eCommerce functionality is crucial. Key areas to be revamped: - Homepage Layout: The homepage needs to be more engaging and user-friendly, ensuring that it's a strong sales driver. - Product Pages: These must be redesigned to better showcase the products and encourage sales. - Checkout Process: The current checkout process needs to be streamlined, ensuring a smooth and hassle-free experience for customers. The website also requires backend development work, particularly integrating the Payment Gateway Razorpay. Therefore, experience with payment gateway integrations is a definite plus. Ideal skills and exp...

...non-emergency medical transportation company. Here are the specific tasks I'm looking to accomplish: - Route Optimization: The AI program should be capable of efficiently planning the most optimal routes. - Patient Scheduling: It should have the capability to schedule pickups and drop-offs for patients. - Vehicle Tracking: A feature to track the location and status of our vehicles is crucial. - Driver Management: The program should also be able to contact drivers, receive bids and select the winning bid. The ideal candidate should have: - Proven experience in AI integration within the transportation sector. - Familiarity with the intricacies of the medical transportation industry. - Strong coding skills, particularly in developing algorithms for route optimization and sch...

I need an illustrator to do 2 concept sketches for a product idea. like this: I need a quick turnaround. please include 3 links of previous sketches in your bids thanks for bidding For my first sketch I need an “ice chest freezer” based on the attached schematic. The final version looks like the 2nd image. The part list is included below: (just in case you don't know) Ice Chest https://www.amazon.com/Igloo-Removable-Free-Standing-Temperature-Basements/dp/B0CGKM3MK3/ref=sr_1_4_sspa?sr=8-4-spons&ufe=app_do%3Aamzn1.fos.c3015c4a-46bb-44b9-81a4-dc28e6d374b3&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY Chiller coil (inside ice chest) https://www.amazon.com/NY-Brew-Supply-AZ-W3850-CV-chiller/dp/B01893T0SC/ref=sr_1_5?sr=8-5 Radiator https://www

I would like to offer you my project. We can discuss any details over chat. [Removed by Freelancer.com Admin for offsiting - please see Section 13 of our Terms and Conditions] i ...NEED A BRACELET PRODUCT PAGE WITH A CUSTOM CHECK OUT PROCESS USING SHOPIFY AND PAYPAL as well as assigning QR codes Ex. when a customer buys a medical bracelet he will need sign up and create a distinct user account with a unique QR CODE. He will scan his exclusive QR CODE to enter his personal medical information on his own private medical web page. The customers unique QR CODE will be laser-etched onto his medical bracelet for emergency personnel to scan to access his personal medical page information. [Removed by Freelancer.com Admin for offsiting - please see Section 13 of our Terms and C...

We are seeking a skilled WordPress developer to design, develop, and maintain a network of landing pages for our business. These landing pages will serve two primary purposes: Conversion Optimization: A portion of the landing pages will be dedicated to supporting our Google Ads campaigns. These pages should be laser-focused on conversions, driving users towards specific actions like purchases, signups, or quote requests. Organic Traffic Growth: Other landing pages will incorporate a blog component to enhance SEO (Search Engine Optimization) visibility. This will attract organic traffic and establish our brand as a thought leader within our industry. For this project, we require a developer with the following qualifications: -Strong WordPress Skills: Experience building custom the...

i have flutter app. that rejected 3 times due to privacy policy, i need some one who can make privacy policy according to google play store policy and make them live, i have 2 app user ap and driver app, the user app already live and driver app needs to make it live

I need an illustrator to do 2 concept sketches for a product idea. like this: I need a quick turnaround. please include 3 links of previous sketches in your bids thanks for bidding For my first sketch I need an “ice chest freezer” based on the attached schematic. The final version looks like the 2nd image. The part list is included below: (just in case you don't know) Ice Chest https://www.amazon.com/Igloo-Removable-Free-Standing-Temperature-Basements/dp/B0CGKM3MK3/ref=sr_1_4_sspa?sr=8-4-spons&ufe=app_do%3Aamzn1.fos.c3015c4a-46bb-44b9-81a4-dc28e6d374b3&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY Chiller coil (inside ice chest) https://www.amazon.com/NY-Brew-Supply-AZ-W3850-CV-chiller/dp/B01893T0SC/ref=sr_1_5?sr=8-5 Radiator https://www

Car Driver (Turn by Turn Map Verification Project)

I urgently need an app like Lenovo Vantage developed to perform user support assistant functions, such as checking for driver updates from our main site and providing comprehensive device information like processor details, RAM, and hard disk usage. Key Features: - Driver update checker: The tool should easily and effectively check for updated drivers and software from our main site. - Device information display: It should supply full device information, like processor details, RAM stats, and hard disk usage reminiscent of Lenovo Vantage or HP assistant. Compatibility and Timeline: - Platform: The software should be primarily compatible with Windows. - Deadline: As this project is urgent, I am seeking a fast-turnaround, ideally as soon as possible. Ideal Freelancer’...

Hi Munir, I'd like to hire you for a project. You will find specification of the project on the attached document. Project consists on porting an already developed board running on ESP32-S3 to ESP32-S2. After that some driver integration is required and maintenance.

I need help routing an allwinnder D1 SoC to DDR3 RAM and rout the PMICs. You should be proficient in length matching and proper KiCad design. You must review the schematic to ensure there are no issues before you start routing. I'm seeking a proficient PCB designer with experience in KiCad for the development of a multilayer circuit board intended for consumer electronics. Key Points: - The project involves the creation of a multilayer PCB targeted for consumer electronics. Prior experience in this field would be highly advantageous. - Proficiency in KiCad is essential. Prior experience working with KiCad for multilayer PCB designs is a must. - You should have a good understanding of the manufacturing process for consumer electronics PCBs, including the constraints and requi...

I am seeking a Solidworks expert to craft intricate designs for a series of industrial trolleys. The ideal candidate will have experience with detailed, moving parts in their designs and will be able to optimize these designs for laser cutting. Key Responsibilities: - Develop highly detailed industrial trolley designs - Ensure the designs are optimized for laser cutting - Maintain excellent communication throughout the project Skills Required: - Proficient in Solidworks - Experienced with complex, moving parts in designs - Understanding of optimization for laser cutting - Strong communication skills to keep me updated on the project's progress. Please ensure to detail your relevant experience and provide examples of your previous work in your proposal.

...version of the classic Pac-Man game specifically for the Mac platform. The development will focus only on the easy level of gaming, meaning only Pac-Man, mazes, and points will be incorporated, no ghosts or power-ups. Moreover, the design should align with the classic look of the original game. Given the specific development needs, the ideal freelancer should possess: - 2-3 cpp/hpp files - driver file - only using #include<iostream> #include<conio.h> #include <stdlib.h> #include<windows.h> Library’s -no graphics text based. -MAY 10th - Proficient understanding of C++ - Mac game development experience - An understanding of classic game design - An appreciation for the original Pac-Man game to ensure accurate portrayal. This project is a...

I have the dimensions of a waterwheel design that will be laser cut from aluminium. I need someone to turn by hand drawn designs into a Solidworks CAD file.

I'm in need of a skilled professional who can convert an images into a DXF file optimized / symmetrical for CNC cutting. Key Requirements: - Expertise in DXF conversion: I specifically need the conversion to be high-detail, including all fine features of the original ima...in DXF conversion: I specifically need the conversion to be high-detail, including all fine features of the original image, to ensure the CNC cutting is accurate and precise. Ideal Skills and Experience: - Proficiency in CAD software: You should be adept at using CAD software and have a keen eye for detail to ensure nothing is lost in translation from the image. - Prior experience with CNC and laser cutting: An understanding of how these machines operate and the requirements for their files is essential fo...

I'm searching for a talented CSS and HTML expert with a modern design aesthetic and laser-sharp detail focus. The aim is to enhance the overall layout and font styles of our CRM. What I'm Looking For: - Strong capability in CSS and HTML - Excellent understanding of modern design and typography - Experience in CRM layout assistance Application Details: - I'm mainly interested in your past work. (please send examples) - Ensure you share projects where you've successfully worked on CRM design. - Projects that highlight your creativity and modern flair are going to have an advantage. Looking forward to seeing eye-catching CRM redesigns that take us into the future. It includes design of pdf invoices and quotes. You should independently improve the design UX an...

Develop a cross-platform mobile app that enhances the shared transportation experience in a specific country. The app should provide an intuitive and user-friendly experience for riders to discover available shared taxi routes, request on-demand pickups (for eligible members/routes), track driver locations in real-time, and facilitate secure payments within the app Key Components: UX/UI Design Conduct user research and create persona profiles Design intuitive user flows and navigation Develop high-fidelity mockups and prototypes Ensure a consistent, modern, and locally-relevant visual identity Focus on accessibility and inclusive design practices App Development User Registration and Profiles (Riders and Drivers) Real-time Mapping and Location Tracking (GPS integration) Browse Ava...

...voltage to 6VDC, with a max current of 500mA. This circuit will be powering LED lights and should be compatible with an input voltage range of 12-24VDC. The circuit should also account for the presence of 4 diodes. - 4 Diodes - forward V - 8V limit to 7V max - max operating current 500mV - inline switch to turn any of the diodes in circuit on/off - need an LED in line for each Diode if active or blown ( when diode fails it is shorted 1ohm) Key requirements and considerations include: - Voltage regulation: The primary functionality of the circuit is to regulate input voltage to 6VDC for optimal LED power. - Current capacity: The circuit should handle a maximum current of 500mA, ensuring the LED lights operate efficiently. - Input voltage range: The circuit needs to be ...

...cm in diameter, in a circular shape. This makes it a large piece, so attention to detail and precision is crucial. - **Material:** The material of choice for this project is wood. I'm particularly interested in laser engraving the design onto the wood. The finish should be natural, without any color added. - **Design:** I don't have a specific design in mind, so I'm looking for a creative freelancer who can help me design something that would be fitting for this unique piece. Ideal skills and experience for this job include: - Proficiency in working with wood, and especially in laser engraving - A good eye for design and a knack for creating custom art pieces - Experience with large-scale artwork would be beneficial - The ability to communicate and collabor...

...sections are required: Power Ground Circuit: +15V, +5V. Lower Ground (controller) Circuit: +12V, +5V, +3.3V, -12V. Ensure that both grounds are isolated from each other. The design must be lightweight and compact, suitable for a portable device. We need the design to be highly reliable and efficient, with considerations for safety and durability. Job Responsibilities: 1) Design: Develop a schematic and board layout for a multi-output power supply that meets the specified requirements. 2) Prototyping: Assemble and test the prototype on a PCB to ensure it meets performance standards. 3) Delivery: Deliver the fully tested PCB to us, including all design files (schematics, board layout, BOM, etc.). Candidate Qualifications: 1) Strong experience in electrical engineering, speci...

I'm hosting an indoor party that requires a mix of static, moving head, and laser lights to create an electrifying atmosphere. The venue is medium-sized, between 100-500 sq. meters. The ideal candidate should: - Have experience in setting up party lighting systems, especially for Rave events. - Be able to work with a medium-sized venue to provide suitable lighting options. - Possess the necessary equipment for static, moving head, and laser lights. - Understand the importance of creating a dynamic and engaging lighting experience for a party setting. If you have experience with lighting design and implementation for high-energy events, I'd love to hear from you.

As a project manager requiring embedded software engineering, I need qualified candidates to handle firmware development, device driver programming, as well as embedded systems testing and debugging. The target platform is a microcontroller and the primarily language utilized will be C. Ideal Skills and Experience: - Proficient with C programming language - Extensive experience and understanding of firmware development - Competence in device driver programming - Proven background in embedded systems troubleshooting and debugging - Familiar with microcontroller platform

I need a web application built to facilitate the delivery and collection of ice cream. Here's a brief of what I'm looking for: -plan for delivery depends upon the customer orders - Map Integration: The application needs to integrate maps for tracking deliveries. -collection money with denomination entry and expenses entry for driver and salesman The workflow should be inclined towards invoiced and delivery system.

I'm seeking a talented t-shirt designer with a passion for racing and a good understanding of the Dirt Late Model series. Key Elements: - Car Images: The design will prominently feature two Dirt Late Model cars from photos I will provide. - Driver's Name and Number: Include the name, number and hometown of my driver, along with sponsors, to add a personalized touch. Style: - Vintage: The design should have an old-school, classic racing vibe. Think about incorporating retro color schemes and fonts that give the impression of a bygone era. Ideal Skills: - Proficiency in t-shirt design, with a particular emphasis on racing themes. - A keen eye for detail, especially when it comes to accurately representing Dirt Late Model cars. - Ability to create a vintage aesthetic that ...

I'm in need of an original Scheme language interpreter tailored specifically for Windows. This tool is to be primarily used for educational purposes, hence it should be user-friendly and efficient. A command line interface is sufficient for this tool. Must be written using python. Please include small simple technical report and simple design schematic. Ideal Skills: - Proficiency in Scheme language - Experience in developing Windows applications - Understanding of educational software design

I'm searching for a proficient Arduino coder, to support in integrating dc motor driver, lcd20x4 with I2c and inductive proximity sensor into my existing project. The primary goal is to control 2 dc motor simultaneously. Key requirements for this role include: * Proficiency in Arduino coding * Vast experience with sensor integration, specifically using inductive proximity sensors * micro controller

...application which does not work if the MongoDB library is included. Structure of the application is: Node Express application - Exposes a few simple test API endpoints. Docker - The Node application runs in a Docker container MongoDB Atlas - Currently this is *not* included but it is the objective of this work. I want the Node application to make a connection to MongoDB using the *native Mongo* driver. NOT Mongoose. NodeMon - Project is setup with file monitoring to save development time. Also, the Visual Studio debugger is enabled and appears to be working well. Here is a link to a Visual Studio project which contains a test version of the application error. It has had files removed for security and to reduce the file size. Here’s some rough instructions, I&rsqu...

I'm in need of developing a Windows driver to use indirect display driver to store extend virtual screen picture to bitmap file. Ideal Skills and Experience for the Job: - Expertise in Windows driver development - Proven knowledge and experience in DirectX. Requirements: - Development of a Windows driver based on Indirect Display Driver. - A test application with a button, click "Capture" that capture frame from the virtual screen. - Ensuring the compatibility of the driver with the hardware is crucial in this project

...open. Requirements: - The non-text components may be an exact replica of the reference design provided. - I'd prefer you start with the background first without text, unless you're able to easily seek a comparable/identical font. The W is malformed, which isn't what we want. - Must be designed for ease of altering colours in mind (group shapes in the editable). - Consider this will also be laser cut, although this may use two separate SVG's. Outputs: - Supply the editable vector image. Extras: - If you want to make a subtle single shade flat seamless pattern for the background of a website, this would receive a payout. I imagine some generic food items in a diagnol grid. MVP: (minimum viable product for submission) - I cannot find a comparable font....

Hello, everyday my teammate (driver) will screenshot their completed task and send to my WeChat (desktop app). I need the robot, to use exisitng WeChat feature to extract the data from the photo, and copy the extracted data into the excel. Here is the simple introduction how the taks looks like: Please let me know if you required more clarification of my requirement. I'm fine with any RPA product, (preferable Microsoft Power Automate). As long as the RPA product is free/not expensive.

I need a PCB designer (KiCad) for modify original design of a STM32 Nucleo64-Board(F302R8/F303RE) in order to add 2 MAX1487 on USART1 & USART3. I already have a working prototybe as a "hat" form factor for the nucleo, so the purpose of this mission is to merge our prototype schematic into the Nucleo schematic and supply a complete KiCad project ready for production (Gerger + steps to reproduce)

...page. Room types are Private Room, Shared Room, Shared Medicaid. Employees Page, Column A -I want to select employee job type from a dropdown menu for each employee. There are 22 employees, and the Employee job types are: Caregiver Med Tech, Caregiver Non-Cert., Kitchen Chef, Kitchen Staff, Nurse, Bookkeeper, Administrator, Director, Admin Assistant, Activity Director, Maintenance Worker, Driver. Also, I would like 4 blank rows at the bottom where I can add new employees if needed. Shifts Page, Column A Row 14 -Change Shift Types to match Employee Job Types above. -Add 10 blank rows where new shifts can be added. Schedule Page Column A -each row under A7 "Staff" should have a dropdown menu where Employee Job type can be selected -each day of the week should hav...

I need a CAD file created for a CNC fiber laser cutting machine. I have a DXF file which will be utilized for cutting steel with a thickness above 6mm. The design should be optimized for the best possible cutting outcome. Ideal skills and experience for this project are: - Proficiency in CAD, especially in creating files for CNC machines - Prior experience with designing for fiber laser cutting - Advanced knowledge of materials, especially steel and their cutting requirements - Ability to optimize design for cutting process

I'm seeking a SolidWorks expert to design an equipment enclosure for industrial manufacturing purposes. The enclosure is meant to withstand the specific environmental conditions of a laser welder setting. Key deliverables include: - Development of a robust, functional and aesthetically pleasing equipment enclosure for a laser welding system - Ensuring the design meets the specific requirements for use in an industrial manufacturing environment - Creation of detailed CAD files that can be used for manufacturing Ideal candidates for this project should have: - Extensive experience in using SolidWorks for designing equipment enclosures - A strong understanding of industrial manufacturing processes and the associated environmental conditions - The ability to create design...

I would like to know if you are the person for my project I need a STL file Used for laser engraving And for a stamping tool both told me that I need a TCL file I need this to be 3D I'm attaching a photo of the item that it's current which is made out of 925 Silver The thickness of the finding is 5,000 of an inch The height of this item is 21 mm The width of this item is 20 mm This one is currently stamped on a stamping machine with a progressive Stamping die I want to also be able to do this on a laser engraving machine which the seller told me it can do and he can send me a sample if we provide him with a STL file We also want to design new finding designs to be able to stamp or laser engrave which they all tell us we need a STL file to develop new style.

I am seeking a skilled artisan to create a minimalist laser-cut portrait in a classic portrait orientation. The subject will be human. A picture is provided. It is a portrait of a woman in pdf format. the attached file is "2024-05-03 " The final result should be similar in style to the "laser cut face " sample attachment. The format needs to be in DXF format. All the lines must be suitable for laser cutting. The lines must have distance so that the laser path does not intersect. Features such at eyes and noses must be cleverly stenciled so they do not fall out of the composition during laser cutting. KEY REQUIREMENTS: - Expertise in laser-cut designs - A knack for minimalist portrait design - Strong understandin...

I'm in need of a freelancer who can help me with a project in the industrial sector. The project involves the following: - Specifying the necessary parts for the project - Creating a detailed schematic - Designing a PCB - Generating a 3D model of the project This project requires a high level of precision and accuracy since it's intended for industrial application. Your work will be crucial in ensuring the success of the project. In terms of software, I have not made a decision on which specific software to use yet, so I'm open to your suggestions and expertise in this area. Please keep in mind that I haven't set a specific deadline for the project yet. However, I would appreciate it if you could give me an estimate of the time it would take you to complete ...

...cartoon character designing, we operate a mattress recycling company 'Matt-Less' and would like a male character creating as the 'face' of our brand. The idea in our head is along the lines of Peter Perfect from the Wacky Races cartoon series, a dapper, good looking, smooth 'hunk', attractive to girls, chivalrous, charming, witty, immaculately presented and successful. He is a winner, a racecar driver, Peter had a crush on Penelope Pitstop, often stopping to help her; Sometimes Peter Perfect demonstrated an unusual elasticity ability, although this seemed to be just a gag. Despite numerous mechanical mishaps and other incidents, Peter always keeps a cheerful demeanor and lives up to his image as the perfect gentleman. He's been shown as bei...

I'm seeking a web designer with a great eye for a modern and sleek aesthetic. This website will be for a motor racing driver and should convey professionalism, speed, and appeal of the sport. Key website features include: - A racing schedule and results page showcasing the driver's past records and upcoming races, - A driver's biography page with career achievements, personal background, racing experience, and goals and ambitions, - A partnership page for showcasing sponsors and potential collaboration opportunities. Experience in sports-related website design is a plus, as is familiarity with motor racing. A creative flair is crucial, as well as understanding how to create a user-friendly and intuitive navigation experience. Please include examples of previous work...