Battery equalizer circuit schematicpráce

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    5,000 battery equalizer circuit schematic zakázek nalezeno, ceny v EUR

    Macbook Pro '12

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    I am seeking a proficient AutoCAD designer with exemplary skills in electrical design. In this role, you will be tasked with: - Designing an electrical circuit - Creating an effective wiring layout - Developing a functional panel design Your work will contribute to a small-scale project and will require a keen attention to detail. Skills in detailed, precise design work and experience with similar projects are crucial. Please note, I require the use of AutoCAD 2017 .dwg for this project. Familiarity with this software version is essential to your success on this project. If you feel these tasks align well with your expertise, I encourage you to apply.

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    I need a highly skilled engineer to help me bring to life a rechargeable battery pack. This pack will be used specifically to power a mechanical device. Skillset and experience needed: - Proficient in battery development and design - Solid understanding of mechanical devices and how they operate - Prior experience in designing and creating battery packs Project specifics: - The battery pack should meet certain capacity requirements. Exact specifications will be shared upon project award. - I also need the battery pack to adhere strictly to size and weight limitations. Details regarding these limits will also be communicated during the project's timeline. I am looking for an expert who can provide valuable insights and recommendations based on t...

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    English: I am seeking an electronics expert to develop a custom Printed Circuit Board (PCB) for a DC-DC Step-Up Boost converter with the following specifications: Input Voltage: 20 to 30V Output Voltage: Adjustable from 35 to 52V Current: Support up to 8A Specific Requirements: Maximum Voltage Adjustment: The board must include a method for adjusting the maximum output voltage limit. Current Limit Adjustment: Implementation of a system for adjusting the current limit through a 0 to 3.3V input signal, where 3.3V corresponds to the maximum limit of 8A. Shunt Resistor and OPAMP: Incorporation of a shunt resistor with OPAMP, including potentiometers for fine calibration. On/Off Function: The board should allow the option to switch between input voltage (off) and amplified output volta...

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    Basic Circuit Board Creation 6 dní left
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    ...with expertise in creating basic circuit boards to help with the development of a new product. We will have 15 led lights that can illuminate normally or flash. They will light in different sequences. Ie Light 1 flashes and light 5 lights. Then say light 3 illuminates and light 3 flashes etc. The idea is to have an app made to manage / send the info for the sequences, I need someone to create the circuit board with the lights so that we can connect to a mobile app. Key aspects of the project include: • The creation of a circuit board design that supports integrated circuits • The product is in its developmental stage, requiring your input and creativity Ideal skills and experiences: • Demonstrated experience in designing and developing basic ...

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    I am seeking a talented electronics engineer to construct a vintage-style Teletronix LA2A compressor. You must have proven experience in audio tube/ valve builds. Not solid state or pci required. - The project's purpose is to recreate the iconic sound of the vintage Teletronix LA2A. - I possess a specific design schematic which must be conscientiously followed. - Fidelity to the original design is paramount, thus requiring a step-by-step exact reproduction. - Ideal candidates will have proficiency in electronics, with keen attention to detail. Proven experience and portfolio. Best based in uk or USA as the components I have are rare as hens teeth and I will not let them go to Asia, far east or outside of known countries. Enjoy the challenge of accurate replication whilst br...

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    ...small-sized custom Printed Circuit Board (PCB) with integrated ESP32 and DRV8833 motor control drivers and 18650 rechargeable bttery. - PCB Size: The PCB should be small-sized, built with quality and precision, and space-efficient. - Motor Control: It needs to control a DC Motor using DRV8833 motor driver, ensuring optimal performance and minimal signal interference. - Voltage Range: The PCB should be designed to handle an input voltage of 5V, ensuring it's safe and efficient. - Battery: The design should incorporate a rechargeable battery without compromising the compact size. The ideal candidate should have proficient skills and experience in PCB design, electrical engineering, and ESP32 integration. Knowledge of motor drivers and familiarity with power-ef...

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    I am seeking a highly skilled professional to help me build a novel hardware prototype. I will need schematic drawings as well as the prototype in order to apply for a patent. The main purpose of our design is to effectively demonstrate the concept of our product and secure a patent. Key Deliverables: - Design a prototype that showcases the user interface design - Clearly demonstrate the core features of the application - Exhibit optimal usability and user experience This project requires proficiency in understanding hardware design, user interface, and usability as well as how to put together the schematic drawings. Experience with patents is a plus. The ideal candidate should be comfortable with creating hardware that communicates a novel concept. Please note, t...

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    DOM
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    I'm looking for a competent professional who can transform images of electrical design into high-quality electrical schematics, block diagrams, and electrical system overviews. This will involve multiple pages of work, which should be properly labeled. • Software: Proficiency in AutoCAD Electrical is a must, as this is my preferred software for the production of the diagrams. • Bill of Materials (BOM): A basic component listing level of detail on the BOM would be sufficient for my requirements. • Compliance: It's crucial to note that the designs should be detailed and not bound by a specific electrical standard. If you have a firm grasp on producing accurately detailed electrical drawings, then this job may be for you. Bring your experience and skills to the t...

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    I'm seeking an expert electronics engineer to design a circuit for an Arduino-based, battery-powered hand warmer device. This design must incorporate intelligent functionality for temperature and run-time control. Key requirements are: * The device should warm up to 42°C and maintain this for one minute. After that, it should shut down and take a break for an hour (this cycle to repeat continuously). * The unit must have a maximum temperature limit of 45°C. * There should be a 0.96 inch OLED screen displaying temperature and time status. * The design should include push button control to start the skin warming and once the push bottom pressed again the program should quit off the warming cycle . * Using Normally closed temperature switch 45 deg. as safety feat...

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    Project Overview: Briefly describe your air mouse concept, its functionalities (3-axis motion control, Bluetooth connectivity for PC), and target platforms (Windows and Mac). Hardware Specifications: Specify the desired functionalities: 3-axis accelerometer for motion detection Bluetooth Low Energy (BLE) for wireless connection Battery type (consider rechargeable Lithium-ion battery for extended use) Button layout (left click, right click, scroll wheel, etc.) Housing material and size requirements Software Development: Outline the basic functionalities for cursor control on PC (Windows and Mac compatibility is a complex task, be prepared to discuss options with the freelancer). Mention any additional features you envision (e.g., programmable buttons, power management). Delive...

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    I'm looking for an experienced full stack developer, particularly strong on the front-end, to create a web-based platform that simulates lab experiments focusing on Electronic Devices. Key Features: - Simulation of lab experiments specifically in the sector of circuit design and analysis. - Quiz section for each experiment Experience and Skills Required: - Extensive experience with Front-End development - Proven track record in creating interactive simulation applications The goal of this project is the realistic simulation of lab experiments conducive to a virtual learning environment. Relevant experience is essential. Please provide details of similar projects completed. Looking forward to collaborating!

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    As an electronics enthusiast, I'm seeking a proficient LC Spice user who can conduct comprehensive analog circuit simulations. The attributes of an ideal candidate are: - Proficient in LC Spice for circuit simulation. - Understands analog circuits and how to effectively simulate them. - Capability to perform frequency analysis, transient analysis, and AC/DC sweep in the simulation. Your aptitude in these skills and tasks will contribute significantly to the success of this project. Familiarity with electronic component analysis and voltage/current measurements is a huge plus. I look forward to working with a professional who shares my passion for electronics.

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    ...tracking, call and SMS monitoring, internet activity tracking, etc. Ensure the security and privacy of user data by implementing robust encryption methods and secure data storage practices. Conduct thorough testing to identify and fix bugs, performance issues, and compatibility problems across various Android devices and OS versions. Optimize the application for performance, responsiveness, and battery efficiency. Stay updated with the latest Android development trends, tools, and technologies to incorporate them into the project. Provide documentation and technical support as needed throughout the project lifecycle. Requirements: Proven experience as an Android developer with a portfolio of successful mobile applications. Proficiency in Java and/or Kotlin programming languages....

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    i need somebody to help me to extend the battery of my solar cctv, when the cctv have more than fifth percent battery, it can film from time to time.

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    I am looking for a skilled Android app developer to create a music equalizer app, incorporating elements of Sound Beautifier. Expertise in minimalistic application design is a must. Key Features: - Customizable equalizer settings, - Pre-set sound profiles, - Audio visualizer. Additional Functionalities: - Playlist creation, - Integration with other music-streaming apps. If you have experience developing similar apps or have a strong understanding of music equalizer applications, please bid. Also, provide examples of previous work fitting this description for best consideration. You will be recommended to make a competitive offer as I am looking to balance quality and affordability.

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    i just need a small circuit board design for my esp32 to sit in, and some pads for soldering wires. See diagram.

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    I'm seeking an expert in ESP32, someone who has successfully designed and constructed a data-collecting PCB. This device will incorporate 4-5 sensors, such as temperature and humidity sensors etc. The main aim of these sensors is to gather relevant data for later analysis. A reliable power source is essential for this device, necessitating the use of a battery to ensure continuous functionality. In the event of a power interruption, the device should be capable of entering a deep sleep mode after successfully transmitting data. Key points regarding the project are as follows: The project must be completed within 15 days. The device needs to transmit compiled sensor data at specific intervals. The ideal freelancer for this task should be proficient in ESP32, PCB development...

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    As a personal project, I am seeking for a Analysis of 4E (Energy, Exergy, Economic, and Environmental) for hydrogen production via Conventional Gasification method. Initially, this system is modeled in Aspen Plus software, and then the desired outputs are analyzed using 4E analysis in the computational software EES. The schematic cycle is attached. The ideal candidate for this project would have experience in chemical engineering or Mechanical engineering, particularly with hydrogen production and its processes. Using Aspen Plus and EES for analysis is also required. Potential freelancers should be detail-oriented, thorough, and able to deliver high-level analysis.

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    I'm in need of a marketing-savvy freelancer to help me...ebikes. These premium, Harley-style bikes are a perfect choice for: - Commuters looking to save on gas and avoid traffic - Outdoor enthusiasts - Elderly individuals wanting to enjoy a leisurely ride - Males aged 16-55 While the primary purpose of these ebikes is commuting, they are versatile and equally well-suited for leisurely and recreational rides as well. Key Selling Points: - Exceptional battery life - Harley-style design I'm looking for someone with experience in online sales, and a strong ability to target and engage potential customers. Skill in advertising strategy, online marketing and knowledge or interest in biking will be a strong advantage. Bring your expertise to this project and help me get these...

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    My project requires a proficient individual to create a PCB design using Altium Designer. The task specifically details: - Crafting a moderate complexity circuit, encapsulating 10 to 50 components. - The construction of a double-sided PCB. The ideal candidate should possess: - Proficiency in Altium Designer. - Previous experience with designing circuits of moderate complexity. - Relevant experience in creating double-sided PCBs. Please provide samples of previous works if possible. This will be a great opportunity for those with the right skill set. Looking forward to your responses.

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    I'm seeking a proficient electronics engineer to design a PCB board for a control system project. The PCB board needs to integrate key components: - A GPS Module - An ESP32 Microcontroller , Internet-POE ESP32 project is actually started, we already have the autium files with dimmension, but is full of mistakes. As an experienced professional in circuit design and prototyping, you will be tasked with ensuring these components are integrated seamlessly. Particularly, extensive knowledge in microcontrollers and GPS modules is essential for this project. The ultimate goal is a reliable and efficient PCB board for our control system.

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    Design a weatherproof sheet metal enclosure for a solar power system, to house the solar panel, and space for small electronics enclosure and lithium battery system. Design must be simple to manufacture and keep water away from the electronics and battery. The design should be visually appealing, concealing all wiring and electronics under the solar panel itself. The design must incorporate a sleeve to mount the enclosure onto a 90mm diameter steel pole and places to mount 2 antennas on top of the enclosure. Specific requirements: - The dimensions of the solar panel are 770mm x 670mm x 35mm. - Enclosure must have an access panel to remove the battery and electronics enclosure inside. - Electronics enclosure is approx 200mm x 100mm x 60mm - Must have anti-bird spike...

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    ...marine surface. Experience with GPS technology is vital. - Anchor hold: Once the desired location is set on the GPS, it should hold the boat in that position. - Compatibility: Flexibility to integrate with any electrical trolling motor ensures this device caters to a wide range of sea faring vessels. Range: The product should have a decent tracking range, sufficient for typical boat outings. Battery life: - The electronics kit should run up to 5 hours, long enough for a good day of fishing or sailing. Expertise in power management for devices in a marine environment would be advantageous. The project's first phase is technology discovery, hence experience in electronics, GPS technology, and marine applications will be essential. Comprehensive knowledge about electrical ...

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    Design PCBA 4 dní left
    OVĚŘENÉ

    Just design a single bulb led circuit board/driver/ module. Plugged into a 12volts motor vehicle USB port.

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    I'm in the process of integrating a temperature sensor into a PCB circuit. Accomplishing this task requires in-depth knowledge and experience in programming in C++, Python, and Assembly language, as well as a deep understanding of both circuit design and sensor integration. Key requirements: - Proven experience in PCB circuit design, more specifically with sensor integration. - Proficiency in programming languages such as C++, Python, and Assembly language. - Detailed knowledge of temperature sensors and how to integrate them successfully into a PCB circuit. Your task would be to design a PCB circuit that integrates a temperature sensor while meeting the project requirements and timeframes. Interested specialists should demonstrate their history ...

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    ...efficient modules for industrial environments. I'm working with an EC200U 4G module that runs on 3.8VDC, along with other peripherals that require 3.3V. The input power for the system lies in the range of 12-18 VDC. The power management circuit designed should: - Regulate Voltage: Ensure the voltage received by the EC200U module and peripherals is maintained precisely at their required levels. - Provide Battery Backup: Ensuring constant supply of power to the 4G module even when the main power source is unavailable. When main power is available, the battery should be charged and system is power from main power. Suitable candidates should have prior experience working with power electronics design, and specifically with industrial settings. Understanding th...

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    I am in need of an expert in PCB reverse engineering, with a primary focus on the component identification. For this project, I possess a physical circuit board, however, I'm unaware of what components have been used in it. The main goal is to identify these elements and their interconnections. Skills & Experience: - Profound knowledge in PCB circuitry and components - Experience in reverse engineering projects - Capability to work with physical PCB boards - Strong attention to detail in identifying unknown components Deliverables: - A detailed list and diagram of identified components and connections on the PCB.

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    ...who can design a small circuit board (less than 2 inches). The board must utilize the Bluetooth audio master module I've sourced and support some basic Bluetooth pairing functions. Key Features: - Audio playback (via bluetooth module feasycom BT955) - Power management with 3.3V or applicable rechargeable battery and USB-C charging functionality - Button to scan for local Bluetooth devices - LCD display showing a list of devices - Buttons that give the ability to select a device from the display/list for pairing and pair to it - Button to reset the module/pairing - The bluetooth module will be set to HFP mode and support in/out audio from bluetooth headphones back to a wired in/out connection on the board. The professional I'm seeking ideally has experience with...

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    Interval Workout Circuit Design 3 dní left
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    I'm in search of an expert in electrical engineering to create a unique circuit for timing a workout routine. The designed circuit should be capable of timing cardio exercises and strength training intervals for a seamless exercise regime. Key requirements are: - It should provide a signal for 1 minute of green light functioning as "exercise on", and 30 seconds red light acting as "exercise off". - This signals should be repeated cyclically until manually stopped. Ideal freelancers should have experience with circuit design, timing mechanisms, and they should have an understanding of fitness equipment or similar projects. This project offers an exciting opportunity to adapt traffic light technology for fitness purpose. If you're look...

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    This project includes the control of a simulated Air Handling Unit and Compensated heating circuit. The 230V AC ‘Air Handing Unit’ (AHU) fan in this project shall be controlled using a VSD. A green ‘AHU Fan Running’ light on the front panel shall indicate if the fan is running. The operator should be able to set a desired speed of the fan on the HMI. The fan may also be controlled by a ‘Filter DP’ potentiometer at the front panel of the board. The potentiometer is being used to simulate a filter dirty condition, with an increase in resistance indicating an increasing filter dirty condition, thereby increasing the speed of the AHU fan to compensate. If there is a VSD fault, the AHU system should stop operating, and a red ‘VSD fault’ li...

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    ...standards for both indoor and outdoor installations. Sizing and bracing calculations for copper busbar systems to ensure compliance with project specifications and industry standards. Develop assemblies, weldments and sub-assembly drawings and parts details with associated indented bill of material(s) for Low Voltage metal enclosed and metal clad switchgear. This includes assemblies containing circuit breaker, interrupter/disconnect switches, and cable support mounting details. Prepare equipment plan, elevation, side, and cross section views, and lifting details. Create component arrangement drawings based on electrical bill of material. Other assigned duties. Skills: High-level of competency in AutoCAD (knowledge of Inventor or similar software a plus) Well-versed in MS Of...

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    Místní
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    ...expertise in several key areas: - Circuit Design: This is central to the task. The hired professional will need to be capable of designing intricate power circuit systems that support my project's unique requirements. - Electrical System Analysis: I also require someone who understands the intricate details of electrical system analysis. You should be capable of assessing the viability and efficiency of the designed circuits, implementing changes if necessary. - Troubleshooting and Repair: There may arise situations where developed systems don't function as expected. Hence, problem-solving skills and ability to execute effective repairs are crucial. - Use of AutoCAD: Experience with AutoCAD is obligatory for this project. I expect the resulting circuit...

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    ...designed for RC cars. Your task is to effectively communicate key elements such as: - My brand name and logo - Battery specifications and ratings - Safety warnings and instructions. 3 sizes: (1)1200mah 7.4V 30C sticker size:27*40mm (2)1400mah 22.2V 120C sticker size:30*55mm (3)5500mah 7.4V 50C sticker size:41*120mm Should say something like "veloci-cel by " The labels should be integrated into a custom-shaped package design, which can stand out in a crowded marketplace. Please factor in these details into your design and be sure to apply creativity and industry-specific knowledge. In addition to graphic design skills, familiarity with battery product packaging, especially in RC cars sector, is highly desirable for this project. Your design should not...

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    I am looking for two product cases to be designed for 3d printing. I have a previous STL file to base one of the designs off and I will need something similar for the second. Product Design 1: - Case has screw holes inside to fix a PCB - Case is screwable from the outside - Case has wall fixings - Case needs a small circular hole for a cable - Case needs a ...1: - Case has screw holes inside to fix a PCB - Case is screwable from the outside - Case has wall fixings - Case needs a small circular hole for a cable - Case needs a small hole on the top to press a button I have an STL file that does all of the above and I just need it to be modified. Product Design 2: - Case needs to clip together - Case needs to have a battery (I am using a coin cell battery) compartment to c...

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    I need an electronics designer to create a circuit board for me. The project entails designing a compact round circuit board to get power from a small solar panel for the sole purpose of recharging a rechargeable battery, such as the LIR2032, ML2032, or ECR2032. The selected candidate should provide comprehensive documentation detailing the circuit's design, functionality, and rationale behind design choices. Key Requirements: 1. Solar Power Integration: The circuit board should utilize solar energy from a small-sized solar panel. 2. Battery Compatibility: The designed circuit board must be compatible with rechargeable batteries such as LIR2032, ML2032, or ECR2032 3. Documentation: Thorough documentation covering the circuit's sche...

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    Pcb designer with knowledge of circuit diagram and sensors

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    I'm in the process of finalizing a product prototype, which I anticipate will be ready within the next 4 to 6 weeks. It is a new luxury artificial candle that is an extension of the existing battery-operated, flameless candles in the market aim is to launch a crowdfunding campaign to obtain US$40,000 in funds and introduce the product to the US market. The project timeline is stringent, needing completion as soon as possible after the crowdfunding launch. Ideal candidate will have: - Proven expertise in crowdfunding campaigns. - Experience in product launches, particularly in the US market. - Ability to work within tight deadlines while maintaining quality. Your role will be instrumental in helping this idea come to life, from launching the crowdfunding campaign

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    I need a skilled and experienced PCB designer who will focus specifically on product development for consumer electronics. This project involves a moderate level of complexity as it requires a standard multilayer PCB. The tasks expected to be conducted are as follows: - Mainly taking up PCB design tasks and associated BOM - Partial involvement in circuit design An ideal freelancer would have prior experience working with PCB designs in the consumer electronics field. Expediency, precision and a keen eye for detail are vital as the developed prototype will directly contribute to a physical product. The project is a signal converter and i can attach a video of its funtion. Due to my limited software i need to add 2 more ICs: A voltage regulator and a bandpass filter at the highlighte...

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    I'm currently in pursuit of a skilled Electrical Engineer with a hallmark in Mixed-Signal Circuit Design. The primary task at hand will be to assist in finalizing the design specifications of a Mixed-Signal Circuit I have partially completed. Key roles will include - Reviewing my current circuit design - Advancing the existing specifications - Finalizing the Mixed-Signal Circuit Design -I need some calculation that my project is success - Actual measurement The perfect candidate will possess the following skills and experiences: - Extensive experience in Mixed-Signal Circuit Design - Mastery in Electrical Engineering - Proven track record in assisting with design specification finalization - Astute attention to detail Your counsel and execut...

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    I am seeking a proficient el...primary function of this microcircuit is switching between two circuits, not to amplify signals. We need to present a 5.1K GND to one of two GPIO pins on an MCU depending on the state of sensor output that throws a 5V high/low output on one single line Key Project Details: - The circuit should be designed to operate at low power levels to minimize power dissipation. - The preferred material for the transistor is Silicon. Ideal Skills and Experience: - Electronics engineering - Transistor theory - Circuit design and analysis - Experience working with silicon transistors and low voltage systems Your bid will be more competitive if you can provide examples of prior experience designing and building similar silicon-based low voltage transist...

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    I require a seasoned motion graphics artist to create a product demo video. The primary objective? It's the launch of a revolutionary product - let's make an explosive entry. The imagery? Futuristic. Think along the lines of cutting-edge tech, holographic displays, sleek designs. Ideal experience and skills: - Motion graphics creation - Futuristic design aesthetic - Product demo videos and product launches - Ability to translate concepts into visually stunning animations Hit me up if you're keen on shaping the future one frame at a time.

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    I need to develop a module project using Rockchip's RV1126. The SOM module must include: 1GB or 2GB DDR4 RAM, Power supply chip, EMMC, Processor. All I/Os should be accessible through a connector, which will be attached to the tes...used in ESP32 and Raspberry Pi, with 2 MIPI CSI camera inputs, Ethernet connection, Wifi connection via SDIO, Audio (microphone input), Audio (speaker output, PAM8403), 1 MIPI DSI display, 1 RGB Display connector. Adding to the previous specifications, the project must be delivered using Altium software. Payment will be split into stages, corresponding to the following phases of development: schematic, PCB, and, after manufacturing, testing of the entire system. This payment structure aims to ensure the quality and completion of each crucial phase ...

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    I am looking for a professional with extensive knowledge in mobile technology, specifically Chinese smartphones. The focus of this assignment will be to enhance three key features of the device: - Long Battery Life: The device should be optimized to have a longer battery life. Freelancer must advise on how to best achieve this. - High Quality Camera: There is also a necessity for a high-resolution camera that takes quality pictures under a variety of conditions. Expertise in camera technolgy is a plus. - Large Storage Capacity: Lastly, a huge storage capacity is to be expected without compromising the phone's overall performance. Experience in data management and storage optimization is desirable. There's no rush to complete this project, quality is my top priori...

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    I am looking for an Arduino expert to design a schematic and code for a medium-sized courier line follower robot (30-60 cm). This technical project focuses on the design and development of a mobile robot for hospital applications, specifically aimed at efficiently delivering collected blood samples to various stations as needed. Initially, at start-up, the control is done on a Nextion touch screen where the user can type the password to choose the destination. Once input commands have been provided to the robot by the user, the robot will move forward. The forward movement of the robot is tracked by the predefined line detected by the infrared (IR) sensors installed on the robot. The ultrasonic sensor will detect an obstacle if it is in the path of the robot and send the signal to t...

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    ...design a versatile switch mode power supply. Key details and requirements: - Operate on a 220V AC input. - Produce a 48V DC output with two current variants: 10A and 30A. - The power supply should interface with an Arduino ESP32 which will be leveraged to control multiple parameters including voltage, current, and temperature. - Include appropriate safety features in the design, such as short-circuit, overload, and overheating protection. Ideal skills and experience: - A strong background in Electrical Engineering. - Proficiency in using Arduino ESP32. - Proven experience in designing switch mode power supplies. - A keen eye for safety consideration in designs. The successful designer will not only possess the above-mentioned skills but also a sharp attention to detail ...

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    €20 / hr Průměr. nabídka
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    Design and build a sine wave signal generator. The specifications are as follows: - Sine wave output in the range of 40.0-50.0kHz. User adjustable via potentiometer. - The maximum output voltage 20V. - You select power supply (110VAC 60Hz to DC). - BNC output connector. - 3-digit frequency display (plug into PCB via a socket). Design circuit, create PCB layout and manufacturing files, and arrange for 4 PCBA prototypes to be built and shipped to me in the USA.

    €153 (Avg Bid)
    €153 Průměr. nabídka
    20 nabídky