Electronics

Tôi đang hoàn thiện một mạch điều khiển dùng vi điều khiển; sơ đồ nguyên lý đã xong nhưng danh sách linh kiện vẫn còn vài vị trí cần chốt. Board phải đọc cảm biến, điều khiển relay hoặc động cơ, có kết nối không dây (Wi-Fi, Bluetooth hoặc 4G) và hiển thị trạng thái qua màn hình, nút bấm cùng đèn báo... (Budget: $32 - $33 USD, Jobs: Circuit Design, Electrical Engineering, Electronics, Embedded Systems, Firmware Development, Microcontroller, Motor Control, PCB Layout)

This project strictly requires hands-on prototyping, including physical assembly and testing—design-only services will not be considered I already have detailed winding diagrams, coil counts, wire gauges, and a full wiring schematic for three compact electromagnets—each under 10 cm in any direction... (Budget: $750 - $1500 AUD, Jobs: Assembly, Circuit Design, Electrical Engineering, Electronics, Manufacturing, Mechanical Design, Mechanical Engineering, PCB Layout, Product Development, Prototyping)

The goal is to create an end-to-end solution that tracks teeth-grinding and jaw-clenching events while I sleep. Detection will rely on a night mouthguard fitted with pressure and motion sensors, complemented by a lightweight wrist bracelet that streams additional data to an AI-driven mobile app... (Budget: $30 - $250 USD, Jobs: Android, Arduino, Bluetooth, Data Processing, Electronics, Embedded Systems, Machine Learning (ML), Mobile App Development)

I need an experienced product or mechanical designer to create an enclosure that keeps my small PCB board as thin as physically possible. It is for a hospital product worn by a nurse. I have included a sample idea... (Budget: $250 - $750 USD, Jobs: 3D CAD, 3D Design, 3D Modelling, CAD/CAM, Electronics, Mechanical Engineering, PCB Layout, Product Design)

I already have the schematic, PCB layout, and BOM for a handheld pH / EC meter, but the board has never been powered on. I now need the design taken all the way from desk-review to a fully working, calibrated prototype... (Budget: $1500 - $3000 USD, Jobs: Analog Electronics, Electrical Engineering, Electronics, Embedded Systems, Firmware Development, Microcontroller, PCB Layout, Prototyping)

PLEASE READ BEFORE YOU BID - Read this post and both attached spec PDFs fully before you bid. - We are looking for PCB designers. BMS experience is a big plus. - In your bid, give a short basic understanding of this project in your own words... (Budget: ₹75000 - ₹100000 INR, Jobs: Circuit Design, Electronics, Embedded Software, Microcontroller, PCB Layout)

My launch-day PlayStation 5 boots up normally and shows the solid white light, yet the video signal is unreliable— the picture flickers, drops to static, or disappears altogether. I have ruled out the... (Budget: $10 - $30 USD, Jobs: Customer Service, Electrical Engineering, Electronics, Electronics repair, Microcontroller, PCB Layout, Technical Support, Technical Writing)

I'm seeking a detailed wiring diagram for transit shelters equipped with heaters, interior and exterior lighting, and photocell controls for automatic activation of lighting and heaters. The power supply will be from 240V single-phase & Three-Phase utility power... (Budget: min $50 USD, Jobs: Automation, Circuit Design, Electrical Engineering, Electronics, Lighting Design, PCB Layout, Power Supply, Project Management, Technical Documentation)

I'm a freelance recruiter hiring experienced NgSpice users for a remote, flexible-hours contract on an AI training project. Work: design and simulate circuits in NgSpice (AC, DC, transient analysis), work... (Budget: min $50 USD, Jobs: Analog, Analog Electronics, Circuit Design, Electrical Engineering, Electronics)

Electronics and IT hardware sourcing agents based in Ho Chi Minh City need hands-on support to keep the supply chain running smoothly. It involves electronic components and parts, but also commissions full PCB and PCBA runs and occasionally complete devices through local OEM/ODM partners... (Budget: $250 - $750 USD, Jobs: Electrical Engineering, Electronics, English (US) Translator, Market Research, PCB Layout, Product Sourcing, Project Management, Simplified Chinese Translator, Sourcing, Vietnamese Translator)

Long-term sourcing consultant for renewable energy components We are screening a long-term sourcing consultant for a European buyer who purchases in China and Southeast Asia. The buyer makes renewable energy equipment — solar, wind, hydro, geothermal — and hydrogen fuel-cell systems for automotive... (Budget: $250 - $750 USD, Jobs: Automotive, Automotive Engineering, Customs Brokerage, Electrical Engineering, Electronics, Manufacturing, PCB Design and Layout, Product Sourcing, Sourcing, Supply Chain)

I need an experienced electrical building services design engineer for a commercial project in Cambridge, UK. The design work includes: - Lighting and emergency lighting - Power, sockets, and distribution... (Budget: £20000 - £50000 GBP, Jobs: Building Design, Electrical Engineering, Electronics, Fire Alarm Design, Lighting Design, PCB Layout, Product Design, Security Systems)

Project Title Development of an Arduino-Based Tracked Rover – Robotics Engineering Prototype 1. Project Overview I am looking for an experienced Arduino/Robotics developer to design and develop a compact, tank-style tracked rover as an engineering and educational demonstrator... (Budget: ₹1500 - ₹12500 INR, Jobs: Arduino, Circuit Design, Electronics, Mechanical Design, Microcontroller, PCB Layout, Robotics)

I need a complete PCB designed in EasyEDA based on my provided EasyEDA schematic file. The finished PCB should include: - PCB layout - Files for assembly by JLCPCB Ideal skills and experience: - Proficiency... (Budget: ₹600 - ₹1500 INR, Jobs: CAD/CAM, Circuit Board Layout, Circuit Design, Electronics, Embedded Systems, Manufacturing Engineering, PCB Layout, Prototyping)

I have a graphene-printed touch screen that must act on exactly three distinct commands and then wirelessly control a computer, phone, or other custom electronics. The hardware is already fabricated; what... (Budget: $250 - $750 USD, Jobs: API Integration, Arduino, Bluetooth, Electronics, Embedded Systems, Firmware Development, Microcontroller, Nanotechnology, Prototyping, Technical Documentation)

Ingeniero electrónico para diseño de PCB con sensor óptico infrarrojo. Se necesita revisión y finalización de una placa al 80% terminada (21 pads). Buscamos un ingeniero electrónico especializado en diseño de PCB para desarrollar una placa de detección óptica destinada a un dispositivo... (Budget: €8 - €30 EUR, Jobs: Circuit Design, Design Optimization, Electrical Engineering, Electronic Design, Electronics, Embedded Systems, PCB Layout, Rapid Prototyping, Sensor Integration, Technical Documentation)

I have a Dahua VTO door station paired with three VTH indoor LCD monitors. Everything talks to each other—video, audio, call-throughs—yet when I press “Unlock” from any VTH panel or through the DMSS mobile app the voice prompt says “Successfully unlocked”, but the door’s electric strike never fires... (Budget: $10 - $30 USD, Jobs: Android, Arduino, Electrical Engineering, Electronics, Home Automation, Microcontroller, Security Systems, Technical Support)

I'm looking for an experienced motor designer to create a magnet-free synchronous reluctance motor. This motor will be used in electric vehicles or e-bikes and should operate within a power range of 1 to 10 kW... (Budget: ₹12500 - ₹37500 INR, Jobs: Automotive Engineering, Electrical Engineering, Electronics, Embedded Systems, Mechanical Engineering, Mechatronics, Motor Control, Product Design, Prototyping)

My in-house RS485 board starts dropping frames and throwing checksum errors as soon as I hook up more than one slave on the bus. With a single device everything is perfect, so I strongly suspect a hardware issue—possibly biasing, termination, or the way the transceiver’s DE/RE lines are handled... (Budget: ₹600 - ₹1500 INR, Jobs: Circuit Design, Debugging, Electrical Engineering, Electronics, Electronics repair, Embedded Systems, PCB Design and Layout, PCB Layout)

I need a dual-band microstrip patch antenna array built in both 1×8 and 1×16 configurations( objective no. 2 in the reference document uploaded). The arrays must cover two strictly defined bands—5.925... (Budget: ₹12500 - ₹37500 INR, Jobs: 3D Rendering, Ansys, Antenna Design, Circuit Design, Design Optimization, Electronics, Project Management, Prototyping, Signal Processing, Technical Documentation)