Circuit Design Jobs

I need a production-ready circuit and compact PCB built around the ESP32-C6 for an IoT device that must run efficiently on both a small solar panel and a rechargeable battery pack. Wi-Fi connectivity is mandatory, and every part of the design has to prioritise ultra-low power consumption so the unit can sit in deep-sleep most of the day yet still wake to trigger a miniature solenoid valve on command. Power architecture The board should accept solar input (≈5-6 V) and seamlessly switch to a lithium cell when sunlight is unavailable. Please integrate an MPPT-style charge controller, battery protection, and a low-loss power-path so the ESP32-C6 always sees a stable 3 V3 rail. Current draw during sleep should stay well under 30 µA. Deliverables • Complete schematics (EASEDA)...

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...

We are seeking an experienced PCB designer to review, correct, and optimize an existing PCB design and provide the layout file with the dxf format Project Scope: * PCB includes ESP32 (or MCU), USB interface, and RS485 communication * Existing schematic is already completed in EasyEDA (there are some issues) Tasks: * Review and validate schematic (identify gaps/issues) * Optimize power design and signal integrity. * Perform professional PCB layout design. * Ensure EMI/EMC considerations and stable communication (USB + RS485) * Prepare production-ready files (Gerber, BOM, Pick & Place) Requirements: * Must work in EasyEDA (collaborative mode) * Strong experience with mixed-signal PCB, communication interfaces, and power optimization. * Ability to identify design flaws and improve reli...

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,...

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...

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...

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 university 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 dia...

I'm looking for an experienced PCB designer to create multiple PCBs for an integrated control system. The project includes: 1. Current Sensing PCB: - Type: To be determined (shunt resistor, Hall effect sensor, or Rogowski coil) 0 to 20 amps at 240 volt 2. Motor Control PCB: - Function: Control a motor with two limit switches - Control Method: Direct ON/OFF control no limit switched required if can find away around 3. Relay Control PCB: - Components: Two relays (one normally closed, one normally open) 4. Touch Screen Interface PCB: - Function: Control and monitor all PCBs has the main power coming in at 240 volt and is the brain behind the can bus 5. Communication Adapter PCB: - Function: Split communication cable all pcbs will communicate over a cable and ...

I’m putting together the first technical milestone for a car cruise-control study and need a solid, textbook-quality model of the engine control system. The scope is limited to the open-loop stage, yet everything has to be neat enough to drop straight into a later feedback-design task. Here’s what I need from you: • System definition: a concise description of the cruise-control engine subsystem, highlighting the throttle actuator’s role only where it affects the single selected sensor signal—engine speed. • Inputs & outputs table plus the governing equations that connect throttle position to engine rpm. • Transfer function derivation in the Laplace domain, clearly showing assumptions and simplifications. • Open-loop analysis: step and...

I’m looking to build a simple wearable mask prototype that combines light and vibration to create a relaxing sensory experience. The device should include LED lights (preferably RGB) positioned so they shine through closed eyes and run different light patterns. It should also include 1–3 small vibration motors that sync with the light patterns to enhance the experience. I’d like a few basic modes such as calm (slow and soft), medium, intense, and a random mode that generates varying patterns. The patterns should transition smoothly and not feel harsh or abrupt. The device should be controlled with 2–3 simple buttons (power and mode switching). No app or connectivity is needed. It should be powered by a rechargeable battery (USB-C preferred). The physical build d...

Project Description I’m looking for an experienced electronics or instrumentation engineer to design and build a small calibration coil system that generates a known magnetic field for laboratory measurements. The device will be used to calibrate a sensor that detects short, weak magnetic pulses (~1 ms, ~10 nT), so it needs to support time-varying fields up to about 1 kHz. Requirements Build a circular coil or Helmholtz coil (5–10 cm size) Use non-magnetic materials Include a simple drive circuit (MOSFET or similar) Include a precision current measurement (sense resistor + output) Provide outputs for monitoring the current waveform Ensure it works with short pulses (~1 ms) Deliverables Fully assembled working device Basic wiring schematic Documentation of coil size, number o...

I’m building a palm-sized device that helps automate at-home medication. Inside it sit two independent plungers driven by micro servos, a vibration motor, a small speaker for audio prompts, and a 1.68-inch colour display for on-device instructions and feedback. All of these elements need to live on a custom PCB, run from a single rechargeable battery that is properly sized for daily use, and work seamlessly together. You will receive the full parts kit, so your focus is on: • designing the board, • assembling and reflowing it, • loading the firmware, and • proving that everything operates exactly as intended. The most important interaction is tight, reliable coordination between the user’s button press (or other trigger you recommend) and the t...

I need a custom harness to connect a Wi-Fi enabled smart door lock, potentially including installation assistance. Requirements: - Design and build a functional harness - Compatibility with Wi-Fi smart door locks - Potential installation support Ideal Skills: - Experience with electronic hardware - Knowledge of smart home devices - Proficiency in installation and setup

The task at hand is to turn a single concept image of my future battery-powered car into a realistic, build-ready electrical system. I already have people who can handle 3D work in Blender and the mechanical layout; what I need right now is someone who can own the electrical assembly side from concept through first prototype. You will translate the high-level vision into a complete, safe and serviceable setup—choosing the right motor and controller, sizing and arranging the battery modules, laying out both high- and low-voltage harnesses, and specifying all protection, charging and monitoring hardware. Along the way you will be collaborating closely with the Blender designer (for packaging and mounts) and the mechanical assembler (for brackets, cooling and enclosure requirements)....

I need a custom-shaped, single-layer printed circuit board produced quickly so I can test the mechanical fit and basic electrical routing for a new product I am developing. The overall board must stay as thin as practical; once we speak I will confirm exact thickness and any stack-up limits from my enclosure, but the goal is to minimise profile without sacrificing manufacturability. Here is what I will supply once we start: • A rough outline drawing and simple netlist showing the required connections • Components and preferred connector locations What I expect from you: • Review of my outline and placement to flag any manufacturability concerns • At least three fabricated prototypes shipped to me for bench testing Please use whichever professional tools you a...

I already have step-by-step build notes for a tactile glove and the preliminary PCB design files. What I now need is practical help getting that board fabricated through PCBWay. Your job is to take my PCB files, carry out any touch-ups they still require—basic DRC fixes, panelisation or drill map tweaks—then upload the finished Gerbers and BOM to PCBWay, configure the order and place it. The glove relies solely on sensors, with pressure sensors and flex sensors called out in the documentation, so please double-check that the footprints and connector pinouts for those parts remain intact throughout your edits. Deliverables I expect: • Cleaned, production-ready Gerber, drill and pick-and-place files • Updated BOM highlighting the pressure and flex sensors used &bull...

I'm looking for an experienced developer to design an environmental monitoring system using the Arduino UNO R4 Wifi board and LoRa technology. The system will be used to collect data on environmental pollutants. Key Requirements: - Use of Arduino UNO R4 Wifi for data processing and transmission. - Integration of LoRa technology for long-range communication. - Development of a reliable power supply system to ensure uninterrupted operation. - Setup of sensors to detect environmental pollutants (specific sensors can be discussed). Ideal Skills and Experience: - Proficiency in Arduino programming and hardware integration. - Experience with LoRa communication systems. - Knowledge of environmental sensors, particularly for pollutants. - Strong background in power supply design for electro...

I’m inviting a handful of practicing hardware engineers or PCB designers to spend about 15 minutes inside my pre-launch web app, PartPilot (). Upload a BOM or punch in a part number, then tell me—straight, no sugar coating—what keeps this from becoming a tool you’d lean on every day. During my own testing, the ability to see stock information across four distributors in one glance feels like the killer feature, but I need fresh eyes. Point out what’s confusing, what’s missing, and what would make you actually pay for Pro. How this works • You must have real-world PCB experience; KiCad users are ideal, though Altium or EasyEDA is fine too. • Reply with a line or two about your experience designing boards or managing component sourcing. No ...

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.

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.