Circuit Design Jobs

## Senior PCB / Electronics Engineer – Independent Final Review of Completed KiCad Board I am looking for an experienced electronics/PCB engineer to provide a **final independent second opinion** on a completed 4-layer PCB before I manufacture the first five assembled prototypes. **Budget: approximately £20–£30 fixed price.** This is **not a design-from-scratch job** and I am not expecting a lengthy formal engineering report for this budget. What I want is an experienced engineer to spend some focused time reviewing the completed design, identify any obvious or serious remaining risks, and tell me whether they would personally be comfortable sending the board for manufacture. ### Current status The board is **SP-MB1 Rev B.1** and has already undergone extensiv...

I need a complete electrical design for a true-online 600 W UPS that will operate in a home environment. The scope covers everything from the high-level architecture down to production-ready documentation, so that I can have the unit prototyped and assembled without further engineering work. What I expect you to produce includes: • Full schematic with clearly annotated component values • Bill of materials using readily available parts • PCB layout files (Gerber or equivalent) and 3-D board view • Control logic or firmware source (if a microcontroller or DSP is used) • Mechanical outline showing heat-sink placement, transformer or inductor dimensions, and suggested enclosure size • Brief test plan describing how to verify continuous 600 W output, transfer time...

I need to push NFC performance well beyond the usual tap-to-pay distance. The task is to design a tuned 13.56 MHz antenna, compatible with common NFC controller ICs, that can reliably achieve a read/write range greater than 30 cm while staying within regulatory field-strength limits. To succeed you should be comfortable with loop or spiral coil design, impedance matching, and low-frequency RF simulation. A solid grasp of ISO/IEC 14443 or 15693 coupling mechanics is essential because I want to keep the front-end electronics standard and let the antenna do the heavy lifting. Deliverables • Optimised antenna geometry (model, calculations, and rationale) • Schematic and PCB layout files (KiCad or Altium) • Complete manufacturing package: Gerbers, drill files, and BOM &...

I am looking for an experienced Electronic Engineering Freelancer to design a custom, compact, all-in-one PCB for a premium adult collectible display base. The board will be manufactured using standard Turnkey PCBA (automated assembly), so the design must utilize readily available components from standard libraries (such as JLCPCB / LCSC component libraries). Core System Requirements: 1. Microcontroller Core: Integrated ATmega328P-AU (TQFP-32 surface mount package) with a 16MHz crystal oscillator and supporting circuitry. Programming/power interface must be a surface-mount USB Type-C port linked via a CH340G/C serial converter chip. 2. Power Architecture: Direct 5V DC power delivery completely driven over the Type-C USB interface (bypassing battery circuitry entirely). Must include a surfa...

I need a simple, single-board PCB layout created from an already completed and fully tested Fritzing (.fzz) project. The circuit logic, components, and pin mappings are 100% verified on a physical breadboard. This is a very quick micro-task for an experienced electronics engineer. The design is an ultra-low-power Smart Irrigation Sensing Node using an all-3.3V power architecture. Key Specifications & Pin Mapping: • Microcontroller: Arduino Pro Mini (3.3V variant) • Radio Module: LoRa Ra-01 (Antenna area must be kept completely clear of copper traces and ground planes). Pin connections required: NSS to D10, RST to D9, DIO0 to D2, plus standard hardware SPI lines (D11, D12, D13). • Power Input: Direct 3.2V LiFePO4 Battery connection to the Arduino VCC rail (Bypassing the ...

We are looking for an experienced KiCad PCB layout engineer to design and route a compact, battery-efficient 2-layer ESP32-WROOM-32E board for our smart IoT device. We have already completed the circuit engineering, component selection, net map, and mechanical envelope. You will be provided with: 1. A comprehensive 19-page PDF Engineering Specification with exact pinouts, power topologies, and routing rules. 2. A complete Excel BOM with exact footprint definitions, component MPNs, and Indian distributor references. 3. Legacy KiCad board files containing the exact board outline (52.98 mm × 34.00 mm with stepped corner) and coordinates for 6 mechanically locked components. SCOPE OF WORK: 1. Schematic Capture / Verification in KiCad 7 or 8: - Implement clean schematic matching our ...

We’re looking for an experienced PCB designer with strong expertise in EMC-conscious layouts and safety standards. The schematic, reference images, and mechanical requirements are already available. We need a clean 4-layer PCB layout (approx. 170 × 93 mm). The board includes 230V mains and low-voltage sections, so proper clearance/creepage distances, design rules, GND/VCC planes, and an EMC-conscious layout are important. Experience with Surge, EFT, and ESD protection would be great. The project is urgent, requiring completion by next week.

I need four clean, accurate single-line diagrams for a small office room completed tonight. All mechanical and load data will be in your hands the moment we start, and I’ll stay online to clarify circuit counts, breaker sizes, feeder routes, or any other detail you need. Scope • One room, standard office use • Circuits limited to lighting and outlet distribution only • Drawings must observe the specific electrical standard set I provide (copies ready for you). Deliverables 1. Four separate SLD sheets in DWG and PDF 2. Legend, conductor sizing, breaker ratings clearly shown 3. Title block populated with my project info and revision date tonight Acceptance Criteria • No missing protective devices or conductor labels • Symbols match the st...

I’m starting this project from a blank canvas and need a skilled PCB designer who can take my functional requirements (which I’ll share once we kick off) and turn them into clean, production-ready documentation. The board must be a double-layer design populated exclusively with surface-mount parts, so tidy routing, tight footprints and thoughtful component placement are essential. Your first task is to build the full schematic from scratch, validating part choices along the way. Once the schematic is locked, translate it into a compact two-layer layout that respects standard DFM guidelines and any component-specific recommendations in the datasheets. Deliverables I expect: • Complete, well-annotated schematic file (Altium, KiCad or Eagle—whichever you work fastest ...

pcb desinigng around SoC and have experience in VR headset development

I have a manufacturing assembly line that needs a solid Siemens S7-1500 program so the whole process runs reliably without constant operator tweaks. The PLC will take charge of every step on the line—from feeding parts, through each assembly station, to final transfer—maintaining sequence, interlocks, and safety signals while logging key production data for our MES. You’ll be working in TIA Portal (latest V17 preferred, but I can migrate from V16 if needed). The deliverable I expect is a fully commented PLC project file, tested in the simulator first and then ready for onsite download. If you can include basic WinCC Unified screens for status and fault diagnostics, that’s a plus, but the core focus is the ladder/SCL logic that makes the line cycle smoothly. To acc...

I'm looking for an experienced PCB designer to create a board for a weather station. The station will display barometric pressure, temperature, and humidity using digital sensors. Requirements: - Use of I2C digital sensors - Integration of sensors for pressure, temperature, and humidity - Experience with PCB design software - Understanding of sensor data interpretation and circuit design - Ability to provide a schematic and Gerber files Ideal Skills and Experience: - Proficiency in I2C communication - Previous PCB design projects - Knowledge of environmental sensors Please provide examples of similar work and a timeline for completion.

I am seeking a skilled professional to review and optimize an existing PCB trace antenna design, specifically for the EM4325 IC. The project involves addressing performance issues, including limited reading range and angle sensitivity, while ensuring the following: - Detailed Review: Analyze the current PCB trace antenna design for potential improvements. - Optimization: Redesign or adjust the PCB to enhance performance, particularly in terms of reading range and angle sensitivity. - Shape Variations: Provide two shape designs for the PCB to explore different form factors. Provide two different overall PCB board shape designs/form factors incorporating the antenna design, to explore different physical board configurations. - LED Connection Fix: Correct a missing LED connection i...

Hi there, I am looking for an experienced PCB design engineer to lay out a small, high-power LED strobe controller board and prepare the manufacturing files for JLCPCB Economic PCBA (surface-mount assembly) [1.2]. The design is completely finalized conceptually, and I have attached the Engineering Requirements Document (ERD) and the Final Schematic Pinout Map below to serve as your definitive layout blueprint. Project Deliverables Required: Complete schematic and 2-layer PCB layout using EasyEDA (preferred) Verified BOM (.csv) matched to standard, low-cost components from the JLCPCB parts catalog. Formatted component placement centroid file (). Production-ready Gerber Fabrication Bundle (.zip) [1.2]. Core Structural Criteria: Form Factor:...

I’m looking for an electronics / embedded hardware engineer to help turn an existing PI/TDEM hardware design into a working, bench-tested prototype. The project is already substantially developed. I already have the engineering architecture, circuit concepts, component work, connection details, timing approach, and implementation planning. This is not a design-from-scratch project. I mainly need someone who can: - review the existing engineering package only as needed for implementation; - complete or correct schematic/PCB work where necessary; - prepare manufacturing files and BOM; - work with STM32 firmware and ADC acquisition; - handle pulsed MOSFET / inductive coil hardware; - assemble and bring up the prototype; - perform oscilloscope and LCR measurements; - debug the electronic...

I’m ready to move an industrial-grade project from concept to a fully routed, production-ready multi-layer PCB. The board will sit inside rugged equipment, so clean signal integrity, controlled impedance where needed, and rock-solid power distribution are critical. Here’s what I will hand over: • Finished schematic (updated from my draft, or created from your netlist). • Optimized multi-layer stack-up with clear documentation of dielectric thicknesses and copper weights. • Complete routing in Altium Designer or KiCad—your choice—adhering to IPC standards. • DRC-clean Gerber, drill, pick-and-place, and IPC-356 netlist files. • An accurate BOM with manufacturer part numbers and alternates. • Assembly drawings and 3D STEP model ...

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. Your task is to turn these drawings into a tangible proof-of-concept and ship it to me. The magnets will sit in a custom harness. I’m leaning toward a light alloy or other metal solution, but I’m open to your recommendations once you see the design constraints. All electronic components, fasteners, and raw materials will be reimbursed at cost; please keep receipts. Power can come from batteries, a small AC supply, or a rechargeable pack—I’m happy with which...

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. Your task is to turn these drawings into a tangible proof-of-concept and ship it to me. The magnets will sit in a custom harness. I’m leaning toward a light alloy or other metal solution, but I’m open to your recommendations once you see the design constraints. All electronic components, fasteners, and raw materials will be reimbursed at cost; please keep receipts. Power can come from batteries, a small AC supply, or a rechargeable pack—I’m happy with which...

I have already sourced a full set of polycrystalline solar modules and related balance-of-system components; what I now need is an experienced crew who can take the project from “parts on pallets” to a fully functioning, ground-mounted array. The site is a clear, level plot with easy equipment access. Engineering drawings, string layouts and inverter locations are complete, so the work is purely physical installation: setting posts, assembling the racking, mounting the modules, running DC wiring to the combiner, placing conduit to the inverter pad and finishing with a clean, professional cable management job. Deliverables • Ground-mount structure erected, square and plumb • All polycrystalline panels securely fixed and torqued to spec • DC strings wir...

I have a Yale electric rim lock already installed and I want to take it a step further by adding three parallel ways to open it: a keypad PIN, an RFID tag/card, and a biometric fingerprint reader. The main driver is day-to-day convenience for family and frequent visitors—no more fumbling for physical keys—so the solution has to be fast, reliable, and easy to maintain. Here’s the scope in practical terms. I need a compact control module—Arduino, ESP32, or any other microcontroller you feel best fits—wired to the Yale lock’s strike mechanism. It must read all three credentials, decide locally, then trigger the solenoid without noticeable lag. A small OLED or LED feedback indicator and a relay or MOSFET driver for the lock should be part of the circuit. Po...

I’m ready to move a new consumer-electronics concept from schematic to a production-ready, multi-layer PCB and need an experienced designer to take charge of the full layout. The board will centre around a single microcontroller and several board-edge / board-to-board connectors; no other complex RF or high-voltage sections are planned, so the stack-up can stay focused on signal integrity, controlled impedance for USB traces, and clean power distribution. You’ll start from my draft schematic (Altium or KiCad preferred, but I’m flexible) and use it to create: • Optimised multi-layer layout that meets standard DFM/DFT rules for mainstream consumer PCB fabs • Complete manufacturing package: Gerbers, drill files, pick-and-place data, and a tidy BOM with part nu...

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. Your task is to turn these drawings into a tangible proof-of-concept and ship it to me. The magnets will sit in a custom harness. I’m leaning toward a light alloy or other metal solution, but I’m open to your recommendations once you see the design constraints. All electronic components, fasteners, and raw materials will be reimbursed at cost; please keep receipts. Power can come from batteries, a small AC supply, or a rechargeable pack—I’m happy with which...

I’m building an energy-healing device whose sole aim is spiritual alignment through chakra balancing. The unit should actively address every major chakra—from root to crown—so the final design must deliver a complete, harmonious energy profile rather than targeting a single centre. Here is what I need from you: • A clear concept explaining the working principle (light, sound, frequency, crystals, PEMF—or a smart combination) and why it benefits all seven chakras. • Detailed technical drawings or schematics, a bill of materials, and component justification. If you lean on specific frequencies, list them and show how they map to each chakra. • A prototype plan—including housing, power supply, safety considerations, and simple user controls fo...

Design review of an industrial data-acquisition system — Stage 1 Safe Instrumentación (SFI), Bogotá, Colombia, designs modular data-acquisition hardware for geotechnical and structural instrumentation installed on bridges, hydroelectric plants and pipelines, at sites up to 4,000 m above sea level. SFI has a bench-validated four-board prototype: a main controller with cellular and sub-GHz radio, isolated RS-485 and native USB; two near-identical sensor front ends, each with its own MCU, for inclination and for a long temperature chain of up to 200 sensors on a shared bus; and a carrier board for a purchased vibrating-wire module with its own high-voltage protection chain. Part numbers are released under NDA. SFI has consolidated that work into a detailed design docume...

Zephyrus Aerolabs Ltd. is a Green-Tech Start-Up aiming at reducing the evils of climate change by countering unchecked emissions from being let out to the atmosphere. The current team is dynamic, focussed, driven and ambitious. We are looking to expand our horizons by inviting individuals with the same zeal and dedication to be a part of this journey. Role: As the Embedded Systems Engineering Intern, it would be expected from you to oversee the smooth functioning of all projects practically. You shall be a part of the core team of the company and contribute heavily to practical building and execution of all projects alongside the company’s CEO and COO. Responsibilities: ● Effective interpretation of electronic conceptual designs for practical implementation and building of electrical...

PCB Design for Connector Test Adapter Boards (Altium Designer Preferred) I am looking for an experienced PCB designer to create two simple test adapter PCBs, one for each connector type shown in the attached drawing. The board does not contain any active electronics. It is only a passive test adapter with 3 connectors used to verify cable/connector assemblies. Project Scope The attached mechanical drawing already includes: PCB dimensions Connector references and positions Pin mapping between connectors Two DB25 connectors (or equivalent) used as the interface The task is to design: PCB #1 TE Connectivity Header: 3-2834465-6 (36 positions) 2 × DB25 female connectors (or compatible equivalent) Pin-to-pin mapping exactly as indicated in the drawing PCB #2 Molex Header: 505448-3831 ...

### What this is I have three KiCad 10 boards for a telecom cabinet monitoring and access-control product. Schematic capture, part selection, footprints, placement, design rules, BOM and fabrication output are all finished. One board is fully routed. The other two have a short list of connections that two autorouters could not place, and I need an experienced layout engineer to close them by hand. This is **not** a "design my PCB" job. It is a well-defined finishing task on a board that is already DRC-clean, with every remaining connection documented and its obstacle identified. ### Current state, measured | Board | Size | Layers | DRC errors | Connections open | |---|---|---|---|---| | Base | 155 × 90 mm | 4 | 0 | 23 | | Cellular module | 80 × 85 mm | 4 | 0 | 0 &...

Desarrollo de prototipo de convertidor de frecuencia para probar un asiento aeronáutico motorizado Buscamos un profesional con experiencia en electrónica de potencia, variadores de frecuencia y transformadores para diseñar, montar y verificar un prototipo que permita alimentar un asiento aeronáutico motorizado desde la red eléctrica convencional. Especificaciones requeridas: Entrada: 220–230 V CA monofásica, 50 Hz. Salida: 115 V fase-neutro / 200 V entre fases, trifásica, 400 Hz. Capacidad mínima: 1,5 A por fase. Salida con tres fases, neutro y tierra de protección. Alimentación adecuada para los motores, frenos electromagnéticos y circuitos de control del asiento, incluyendo los picos de arranque. Q...

Ich brauche eine kompakte Ladeelektronik für eine selbst gedruckte iPad-Halterung, die künftig in kleiner Serie gefertigt werden soll. Worum es geht • Grüne LED soll anzeigen, dass an der KFZ-Versorgungsleitung stabile 12 V anliegen. • Zweite LED signalisiert, dass das iPad tatsächlich lädt. • Es genügt die reine Basis-Elektronik; ein externes Gehäuse ist nicht nötig, da die Halterung bereits eine passgenaue Aussparung besitzt (Muster liefere ich). • Standard-LEDs sind vollkommen ausreichend. • Ein integrierter Kurzschlussschutz und Sicherung ist zwingend erforderlich, weitere Zusatzfunktionen werden gegebenenfalls besprochen. Liefererwartung 1. Schaltplan und durchdachte Bauteilauswahl (BOM) mit mar...

Ich möchte einen funktionsfähigen Prototypen einer 24-Stunden-Uhr entwickeln, die mit einem Arduino und einem Echtzeit-Modul arbeitet. Die Uhr soll drei wählbare Anzeige­modi haben, die über einen Schalter umgeschaltet werden können. Anzeige­modi 1. Priorität für den ersten Prototyp: Für jede volle Stunde leuchtet genau eine LED. 2. Invers dazu: Standardmäßig leuchten alle LEDs; zur vollen Stunde erlischt jeweils die entsprechende LED. 3. (Optional für diesen Prototyp) Aufsummieren der Stunden – z. B. 7 Uhr → LEDs 1-7 leuchten. Hardware-Vorgaben • Arduino (Uno oder vergleichbar) • Echtzeit-Modul (RTC, z. B. DS3231) • LED-Modul nach Wahl (ich bevorzuge ein vorkonfektioniertes LED-Modul,...

Tôi đang phát triển một thiết bị AI điều khiển bằng giọng nói và cần một freelancer có kinh nghiệm về ESP32/IoT để làm prototype phần cứng đầu tiên. Thiết bị cần có: ESP32 / ESP32-S3 Micro thu âm Loa Wi-Fi LED báo trạng thái Nút bấm Nguồn USB Công việc: Tư vấn và lựa chọn linh kiện Lắp ráp prototype Lập trình firmware cơ bản Kiểm tra microphone, loa, Wi-Fi, LED và nút bấm Kết nối thử với server/API bên ngoài Bàn giao sơ đồ mạch, BOM và source code Lưu ý: Phần AI/ChatGPT, nhận diện giọng nói và chuyển văn bản thành giọng nói sẽ do một freelancer khác phụ trách. Prototype ban đầu có thể ...