电路设计 Jobs

I need assistance in changing my FM frequency to a stronger wattage for increased range. I'm currently using a commercial FM transmitter with less than 100 watts. Requirements: - Experience with FM transmitters, especially in a commercial context. - Knowledge of frequency allocation and legal requirements. - Technical skills to safely upgrade or modify existing equipment. Ideal Skills: - RF engineering background - Experience with high-wattage FM transmitters - Strong problem-solving abilities Please provide a detailed plan and your relevant experience. My name is Daniel Daehan Park, and I operate WQXI (AM 790) in Atlanta along with an FM translator currently on 96.7 MHz. We are exploring a potential frequency change and are looking for an engineer to identify viable FM frequenci...

Job Title: Experienced KiCad PCB Designer Needed to Review and Finalize 4-Layer PCB for University BMS Project Job Description: I am looking for an experienced PCB designer with KiCad experience to help with a 4-layer PCB design for my university electronics project. The project is a Smart BMS for a 3S Li-Po battery pack. I already have: • KiCad project files • schematic • BOM • current PCB file • project requirements and design description I need someone who can review the existing design and help convert/finalize it into a professional 4-layer PCB layout ready for manufacturing. Project summary: The board is a Smart Battery Management System (BMS) for a 3S Li-Po battery pack used in a drone-related application. It includes: • cell voltage monitoring • c...

I need my existing PCB reviewed, verified Deliverables • Design review report showing baseline thermal readings, problem areas, and the chosen improvement strategy • Updated schematic and PCB layout files (Altium/KiCad or native format of my project), plus Gerbers, drill and pick-and-place files ready for fab • Brief design-note explaining every change and the projected temperature drop, backed by simulation plots or measured data The job is complete once the revised board demonstrates the agreed-upon thermal improvement on paper and is ready for prototype manufacture.

Je souhaite publier un guide écrit, ultra-concis (lecture ≤ 60 secondes), pour montrer à un public débutant comment utiliser le module amplificateur de charge HX711 avec un microcontrôleur type Arduino. L’objectif est purement éducatif : offrir une démonstration claire et rapide qu’un débutant peut suivre immédiatement. Livrable attendu • Un texte structuré d’environ 200 mots maximum (Markdown ou PDF) • Schéma de câblage simple (image ou diagramme Fritzing) • Extrait de code Arduino minimal fonctionnel (pesée et affichage série) • Mini-section « Calibration express » (une phrase ou étape flash) • Trois astuces de dépan...

I need help in plecs software

I'm seeking an experienced CAD operator to complete a CAD drawing showing all electrical circuits within a new kitchen Ideal skills and experience: - Electrical engineering background - Experience with commercial kitchen setups - Knowledge of local building codes and safety regulations Please provide samples of similar work done and a timeline for completion.

I need the full design of a six-layer Primus X2 flight-controller board reconstructed so I can port its VFX interface to an STM32 platform. My end goal is to feed a live video stream through an ESP32-CAM, so the reverse-engineered design has to include the exact pathways, pin mapping and signal integrity considerations that will let the STM32 pull that stream in real time. I already have the physical board; what I do not have are the original CAD files, annotated schematic or stack-up. Where the footage ultimately lands is not important right now—just make sure the design can sustain continuous live video. Deliverables • Complete schematic capture, showing every net, component annotation and test point • Layer-by-layer PCB Gerber or native files (Altium, KiCad or ...

I am finalising a smart-helmet cleaning kiosk and now need a proven hardware engineer to turn the control concept into a factory-ready PCB set. At the heart of the unit sits an ESP32, Wi-Fi enabled, that must simultaneously drive high-power AC loads—a 2 kW heater, a fog-steriliser and UV lamps—and several low-voltage peripherals such as fans, magnetic locks and addressable RGB strips. Because the kiosk will ship to commercial sites, rock-solid safety is non-negotiable. The design has to provide proper isolation between the logic side and 230 V mains, robust surge protection on every incoming line, and clean step-down conversion to 12 V and 5 V rails. I am leaning toward a two-board layout: one board dedicated to the noisy, high-current power stage and a second, quieter control...

I need a compact-footprint PCB that runs on a solid 12 V input and plugs straight into Ethernet so it can sit inside my equipment rack and let the rest of my system know everything is still alive. The board’s sole job is to send a small heartbeat packet at set intervals and, if the link ever drops, push an immediate network-status alert that my database can log. Remote-monitoring bells and whistles are not required right now; reliable data transmission and clear link reporting are the priorities. You can choose the silicon you are most comfortable with—an MCU with an integrated MAC/PHY, an external PHY hanging off an ESP32, or another combination—so long as it boots quickly, keeps the BOM lean, and exposes a straightforward way for me to adjust the heartbeat interval lat...

I am developing an industrial-grade board and need an experienced designer who works comfortably inside Siemens PADS. The job centers on a tight, multi-layer layout that hosts both microcontrollers and several power-management ICs, so clean power planes, controlled impedance traces, and rock-solid grounding techniques are critical. Here’s what I expect from you: • Capture the schematic (or import mine) and translate it into a manufacturable PADS layout. • Route every layer with proper clearances, via strategy, and DRC compliance. • Deliver complete Gerbers, drill files, BOM, and the native PADS project so I can iterate internally if needed. I’ll provide component datasheets, existing schematics, and mechanical constraints as soon as we start. If you have a ...

I need a single 2-layer PCB designed, fabricated, and assembled for a compact ultrasonic microphone jammer demo unit. The device emits a frequency-modulated 24–26 kHz ultrasonic signal that disrupts MEMS microphone recording on nearby phones. This is a privacy/anti-eavesdropping demo unit. The circuit design, schematic, netlist, and firmware are ready — I need PCB layout, fabrication, and assembly. What I Have (Will Be Provided) Complete circuit schematic (PDF, A3) Netlist with all connections and component references Bill of Materials with exact part numbers and footprints Firmware source code (Arduino .ino for ESP32-C3 Super Mini) Reference design from open-source project (mcore1976/antispy-jammer on GitHub) Circuit Summary Signal chain: ESP32-C3 Super Mini → AD9833 DDS ...

I need a matched RF transmitter-receiver pair engineered from the ground up for remote control operation. When the handheld transmitter is activated, the receiver must recognise a unique code and immediately trigger a defined sequence of actions inside my host device. Reliability, low latency and immunity to casual interference are essential. Here’s what I’m expecting from you: • Schematic and PCB layout for both transmitter and receiver, ready for fabrication. • PCB Gerber files. • Breadboard demonstrating functionality. • Firmware (or discrete logic plan) that decodes the signal and drives the action sequence pins • A succinct test report proving range, stability, and correct execution of the sequence in a lab environment. You are free ...

I’m ready to move a new consumer-electronics wearable from concept to production and need an experienced PCB designer who can take charge of a compact, multi-layer board. The board must seamlessly combine robust power management, reliable wireless communication (Bluetooth / BLE is preferred), and precise sensor integration for motion and biometric data. You’ll start from my preliminary schematic notes and block diagram, refine the circuitry for a 4–6-layer stack-up, and optimise the layout for low power, tight space, and signal integrity. Please keep antenna placement and ground-plane strategy top of mind so the wireless link stays clean even inside a small wearable enclosure. I’m comfortable with Altium Designer, KiCad, or Eagle files—choose whichever tool...

I am seeking a certified electrical engineer with a calibrated spectrum analyzer capable of measuring up to 20GHz to conduct measurements at my home and on streetlights near my property in Owasso and Tulsa, Oklahoma. The work will involve: - Analyzing my home for specific electrical or spectrum-related concerns. - Measuring streetlights during the day and after dark. - Providing a detailed report of all findings. The work at my house can be completed in the afternoon and evening. Certification, proper calibration of the equipment, and the ability to measure up to 20GHz are mandatory.

I need complete Gerber files for a multi-layer printed circuit board that will be built on six layers. The schematic is ready; what I’m missing is a clean, production-ready Gerber package that a board house can use without further tweaks. Here’s what I expect: • Layer stack-up defined and documented • Drill files, solder mask, paste mask, silkscreen, and assembly drawings included • All outputs checked against standard DRC rules and CAM verified before hand-off If you normally work in OrCAD, or similar professional tools, that’s perfect—just let me know which platform you prefer so I can provide compatible source files. Turnaround time and any questions about the stack-up or manufacturing constraints are open for discussion; I’m look...

I have a complete schematic ready and now need it translated into a production-ready multi-layer PCB. The board will carry a mix of high-speed signals and power lines, so careful layer stacking, impedance control, and good grounding practices are critical. You’ll start from my annotated schematic (PDF + native CAD format) and component datasheets. I’ll also share form-factor constraints and the connector placement I must keep. From there, I expect: • Clean, rule-checked PCB layout in the CAD tool you normally use (Altium, KiCad, or Eagle are all fine). • Gerber/ODB++ files, drill files, and pick-and-place data prepared for fabrication. • Source CAD files so I can make future edits. • A concise design report summarising layer stack, controlled-imp...

I need complete Gerber files for a multi-layer printed circuit board that will be built on six layers. The schematic is ready; what I’m missing is a clean, production-ready Gerber package that a board house can use without further tweaks. Here’s what I expect: • Layer stack-up defined and documented • Drill files, solder mask, paste mask, silkscreen, and assembly drawings included • All outputs checked against standard DRC rules and CAM verified before hand-off If you normally work in OrCAD, or similar professional tools, that’s perfect—just let me know which platform you prefer so I can provide compatible source files. Turnaround time and any questions about the stack-up or manufacturing constraints are open for discussion; I’m look...

I need an expert to perform signal and power integrity simulations for an RF oscillator component. The focus is primarily on RF signaling aspects. Key requirements: - RF signal integrity expertise - Experience with oscillator components - Proficient in simulation tools Ideal Skills and Experience: - Background in RF engineering - Familiarity with crosstalk, timing analysis, and impedance matching - Ability to deliver results quickly Please provide your portfolio and relevant experience. Looking to hire ASAP.

I’m building a compact diagnostic tool for battery and need a production-ready PCB to bring the project to life. Because I’m still weighing single-, double- or multi-layer construction, I’m relying on your expertise to propose the most efficient stack-up once you’ve seen the schematic and performance goals. The board must accommodate power regulation, signal capture, and a USB-C interface while staying small enough for a handheld enclosure. I’ll provide a full instruction as working prototype in my hand and preferred parts list; you’ll translate that into clean, manufacturable design data that any mainstream fab (JLCPCB, PCBWay, etc.) can run without extra tweaks. Deliverables • Editable design files in KiCad • Gerbers, drill files, pick-an...

I want an HID Omnikey 3021 smart-card reader—converted so it connects through a standard USB-C port instead of USB-A, while still providing full-speed data communication and bus power. I only need the cable/connector side removed and replaced with a USB-C connector so the device enumerates and draws power over USB-C just as reliably as it does over USB-A. There should be no cable, just a USB-C connector so that the device is as small as possible. Here is what will make the job a success: • The finished reader plugs into any standard USB-C host and both powers up and transfers smart-card data without errors. • All USB-C wiring follows the spec’s pin-out and current-handling guidelines. • You supply clear documentation (schematic or wiring map, parts used and...

I am looking for a freelancer to create a professional, visually-driven technical presentation based on a single research paper (will be provided). Read and fully understand the research paper ,Convert the entire paper into a structured presentation format. professional, visually-driven technical presentation that prioritizes high-end graphics. Use custom-designed circuit diagrams and system architectures instead of bullet points, and employ clear flowcharts to break down complex processes step-by-step. All numerical data and complex tables must be converted into vibrant, modern charts that highlight key trends and statistical markers. The presentation must follow a logical sequence from the technical problem to the methodology, results, and a sophisticated critical evaluation of t...

I need an experienced PCB designer to convert my schematic diagrams into a multi-layer PCB layout. This PCB is for industrial oil field equipment, and the main goal is to optimize performance. Key Requirements: - Convert provided schematics into a multi-layer PCB layout - Focus on performance optimization - Experience with industrial equipment PCBs is a plus Ideal Skills: - Expertise in PCB design software (e.g., Altium, Eagle) - Strong understanding of multi-layer PCB design - Background in industrial electronics and performance optimization Please provide samples of similar work.

I’m building a compact, two-layer PCB in Altium Designer for the back-light circuit of a bus. The schematic is roughly sketched, component choices are clear, and now I need an experienced board designer to turn the concept into a production-ready layout that can survive the automotive environment (vibration, temperature swings, noise). The job covers refining the schematic where needed, arranging the components for optimal thermal flow and EMC performance, routing the board within the mechanical outline I will supply, and running all Altium DRC checks until the file is clean. Once we are happy with the layout, I also want standard fabrication outputs so I can send the job straight to the board house. Deliverables • Altium project (schematic & PCB files) • Gerbers,...

Necesito un esquema electro neumático básico para una cortadora de disco. Quiero algo sencillo y claro, únicamente el diagrama esquemático sin instrucciones detalladas ni etiquetas extensas. El circuito debe mostrar: • Sensores implicados en la detección de posición o seguridad. • Actuadores que moverán los mecanismos de corte. • Controladores necesarios para coordinar ambas partes. No tengo preferencia por la herramienta de dibujo; puedes usar AutoCAD, SolidWorks, Tinkercad u otra siempre que el resultado sea legible y exportable a PDF y a un formato editable. Entregarás el archivo fuente y el PDF final. Busco precisión en la representación de las conexiones y la simbología normalizada.

I am looking for an experienced electronics engineer to review a completed schematic for an automotive project before moving to PCB layout. The system is designed for use in a vehicle (12V/24V environment) and consists of multiple interconnected modules. The design includes: ESP32-based control system I2C communication between modules MCP23017 I/O expander LM393 comparators for sensing 12V/24V signals Input protection (TVS diodes, resistor dividers, filtering) RJ45 connectors used for inter-module communication Indicator LEDs (including I2C activity via transistor drivers) What I Need A detailed schematic review to: Verify all circuits function as intended Check component values and design choices Identify any design flaws or risks (especially automotive-related) Confirm correct inter...

Electrical Engineer — Data Center Infrastructure (Estonia, on-site) Role: Electrical Engineer / Data Center Infrastructure We are building a micro data center in Estonia (100–200 kW) and looking for an electrical engineer to take full responsibility for the electrical design, calculations, and on-site execution. This is an on-site role in Estonia. Remote-only is not an option. Responsibilities Design electrical schematics (power, wiring, single-line diagrams) Calculate power loads, cable sizing, protection and control systems Select appropriate equipment (switchgear, UPS, transformers, distribution panels) Prepare technical specifications, BOQs, and installation documentation On-site supervision, testing, commissioning, and fault diagnostics Ensure compliance with local ...

I have an industrial-grade machine that is currently down, and I need someone who can quickly diagnose the fault, repair or replace the defective electronic components, and return the unit to full, reliable operation. You will be working on site with three-phase power circuits, control boards, and sensor wiring, so solid experience with industrial electronics, test instruments (multimeter, oscilloscope, continuity testers), and safe lock-out/tag-out procedures is essential. Scope of work • Trace and confirm the root cause of the failure • Source or specify compatible replacement parts • Carry out the repair, re-assemble, and calibrate the system • Run functional tests under load and document the results Deliverables 1. A short diagnostic report (fault found, par...

Dear Team, Requirements: Mobile phone charger Input' wall mount - universal Output: USB-A BC1. 2 and USB-C PD3. 0 Power: 20W USB Type C PD: IEC 62680-1-2/3 comiance is a must USB Type A legacy port Interoperability : IEC 63002 compluance is a must USB-IF compliance is a must Dynamic power sharing CE and FCC EMC compliance is a must according EN 55032/5 Effeciency: EU CoC Tier2 Tast transient responce is a must Regulation 5% @ max load Reinforeced isolation Safty compliance according IEC 62368-1 is a must Environment: working temprature >80 C Board size:30x35mm Deliverables : Full Schematic Design using Cadence or Altium only Full PCB design : Using Cadence or Altium only Circuit simulation using PSpice or LT spice Full mathematical modeling, including transfer functiobs and comp...

I’m developing a compact, aluminium-clad SMD PCB that will live directly on mains, so every detail must be right first time. The board sits on 1 mm aluminium with 25 µm copper, accepts 220-260 VAC and has to deliver a rock-solid 144 VDC at 300-350 mA. Power-factor must stay high thanks to a hybrid DOB topology, while the protection network must survive 6 kV surges and automatically cut in on both high- and low-voltage events. Everything must be RoHS-compliant. Because the board ultimately feeds a power-supply module, thermals and creepage/clearance are just as critical as the electrical design. I’m looking for a clean, production-ready package that lets me hand Gerbers straight to my fabricator and have parts placed with confidence. Deliverables • Complete schema...

Saya sedang membangun sebuah rumah tinggal baru dan membutuhkan ahli untuk menangani instalasi listrik lengkap. Fokus utamanya adalah: • Merancang jalur kabel, titik lampu, saklar, stop-kontak, dan grounding sesuai PUIL/SNI. • Memasang panel, MCB, dan perlengkapan pelindung arus bocor. • Menguji dan memastikan seluruh sistem aman sebelum penyambungan ke PLN. Denah arsitektur sudah tersedia; Anda hanya perlu menghitung beban, menentukan ukuran kabel, serta memilih komponen yang tepat dan rapi. Saya mengutamakan penggunaan material berkualitas, dokumentasi foto di tiap tahap, serta laporan akhir berisi skema instalasi dan daftar material. Sertakan portofolio proyek sejenis, ketersediaan waktu, dan perkiraan durasi pengerjaan dalam penawaran Anda.

I need a complete engineering solution for an ultra-low-frequency electromagnetic transmitter that operates at roughly 22 Hz and fits inside an inline pipeline PIG. Once the PIG is in service, the beacon’s field must be strong enough to be detected up 3–5 m above the pipe, even when the signal has to pass through steel wall, backfill, soil, and asphalt or reinforced concrete. All operations take place underground and fully enclosed by steel, so coil geometry, core selection, drive strategy, and noise rejection are critical. Scope of Work: • Design a low-frequency (~15–30 Hz, target 22 Hz) EM transmitter • Optimize signal strength for underground detection • Develop efficient antenna/coil design suitable for pipeline use • Design low-power circuitry fo...

Project Title: Plant Care System using Delta PLC Project Description: I am looking for an expert in Automation and PLC (specifically WPLSoft / Delta PLC) to deliver a complete project from A to Z. The project title is "Plant Care System using PLC". I need a full package that includes the following 13 items: 1. ABSTRACT: A clear summary of the project. 2. INTRODUCTION TO EMBEDDED SYSTEMS: (Specific to PLC-based systems). 3. BLOCK DIAGRAM: Showing the system architecture. 4. HARDWARE REQUIREMENTS: List of all parts needed. 5. CONTROLLER SPECIFICATIONS: Details about the Delta PLC used. 6. COMPONENT SPECIFICATIONS: Datasheets for sensors (Moisture, Temp, etc.) and actuators. 7. SOFTWARE REQUIREMENTS: (WPLSoft, ISPSoft, etc.). 8. CIRCUIT DIAGRAM: Clear wiring/schematic diagram. 9. C...