Circuit Design Jobs

Seeking layout engineer with experience in Altium, low noise analog circuitry, and EMI mitigation. This project encompasses minor updates to an existing board which has already passed EMI testing. There may or may not be a desire to further reduce emissions, but the main focus is signal processing updates.

I need an expert to test and fix circuit components for a radio project. Key tasks include: - Tasting and fixing circuits on both breadboard and PCB - Primarily focusing on transistors and diodes - Diagnosing and resolving short circuits Ideal Skills and Experience: - Proficiency in working with transistors and diodes - Experience with both breadboard and PCB setups - Strong troubleshooting skills for short circuits Looking forward to your bids!

I’m building a compact digital clock timer that uses a six-digit seven-segment display, runs from a rechargeable Li-Po cell, and tops up through a USB-C port with on-board charging circuitry. The firmware needs to cover three operating modes: a standard alarm clock, a configurable countdown timer, and a Pomodoro-style work cycle. Here’s what I need from you: • Complete schematic with microcontroller selection, Li-Po charge/​protection IC, buzzer driver, speaker, and all support components. • PCB layout optimized for low power and minimal footprint while keeping the USB-C routing compliant. • BOM • Production-ready Gerbers, drill files, and pick-and-place data. • Simple bootloader or ISP header so I can reflash firmware easily. (is it possib...

I keep losing power in the living room and bedrooms whenever the same breaker flips, and the issue has become more frequent over the past week. I need someone who can come onsite, trace the wiring on that residential circuit, pinpoint whatever is causing the repeated trips, and confirm the safest long-term fix. Your job is to isolate the fault, explain what’s happening in plain language, and either correct it on the spot or give me a clear written plan—parts, labour and estimated time—so I can approve repairs immediately. A professional toolkit (multimeter, continuity tester, insulation resistance meter) and solid familiarity with domestic wiring regulations are essential. Deliverables: • On-site diagnostic of the affected circuit • Brief report outlin...

We are looking for an experienced RF PCB Layout Engineer to review and complete an existing multi-radio PCB design. This is not a design-from-scratch project. The schematic, component placement and most signal/power routing are already completed. The remaining work is focused mainly on RF layout finalization and production-readiness review. Required experience: Sub-GHz / LoRa RF PCB routing LTE RF layout GNSS RF layout 50-ohm controlled-impedance routing RF matching networks antenna feed layout ground return and stitching-via strategy RF keep-outs and isolation multilayer PCB stack-up EMI/EMC-aware layout KiCad The selected engineer will be required to review the existing PCB, complete/correct the RF sections and bring the board to fabrication-ready status. Expected deliverables incl...

We are looking for an experienced Automotive Electronics / PCB Design Engineer to modify and extend an existing vehicle tracking hardware design into an OBD-II telematics device. The project will include two variants: Modern vehicles – OBD-II with CAN communication. Older vehicles – OBD-II with CAN + K-Line support. We prefer a common hardware platform where possible, with different BOM/configuration options for the two variants. The engineer must have proven experience with OBD-II, CAN Bus, K-Line, automotive power supply/protection, PCB schematic design, and vehicle telematics hardware. Initial deliverables will include the updated schematic, BOM, component selection/alternatives, interface design, automotive protection circuitry, and design documentation. IMPORTANT: Th...

I need a small 33 x 29 mm membrane touch latching switch printed circuit board (PCB) with only 8 SMDs on it, copied for a obsolete device. I'm looking to get 100 of these made, possibly 200 depending on pricing. I can send the 6 component list and photos of the circuit board and a complete circuit board is this 2 sided. The active devices are a ATMEL TINY 13A (needs programming and a PA1CD (i think it's a zener diode, 4 resistors and 1 capacitor. On the decal side there is a small led that lights when latched. It needs to be copied exactly because this switch circuit gets glued into a recess in a plastic case with cutouts for the components so the board lays flat. I may not need the switch decal. Run on a 3.7VDC battery. Key Requirements: - Exact replication of the existing PCB...

I have a consumer-electronics project that is almost ready for production, but I need a fresh set of expert eyes before I commit to tooling. Your job is to scrutinise every level of the design and give me a concise, actionable report. Scope of the review • Schematic – confirm AC isolation, creepage distances, relay selection and power-supply safety. • PCB layout – check placement, clearances, return paths and routing discipline. • BOM – verify component availability, footprints, part compatibility and RoHS compliance. • Firmware – validate logic for sensors, alarms, GSM SMS/call handling, relay control and fail-safe behaviour. • Safety & compliance – highlight anything that could jeopardise CE (LVD/EMC) readiness and fla...

I’m leading a senior-year project where my student team will build and test an induction-motor drive (motor, VFD, sensors, protection, filters, the works). What we’re missing is seasoned electrical-engineering insight during the DESIGN phase. Here’s what I’d like from you: • Review and refine our single-line and wiring diagrams, ensuring safe operation on a 3-phase, 480 V supply. • Help size and specify the motor, VFD, fuses/MCB, contactors, braking resistor, EMI/RFI filters, current/voltage sensors, and any surge- or overload-protection devices. • Validate thermal calculations, harmonic considerations and grounding/shielding practices. • Provide a concise Bill of Materials with part numbers and vendor suggestions, flagging long-lead or co...

I have a consumer-electronics concept ready for the next step and need a clean, production-ready double-layer PCB layout. The board will host a mix of through-hole and surface-mount parts, so component placement and routing must accommodate both styles without ballooning the footprint. Deliverables: • Finished design files in Altium and industry-standard Gerbers • Drill files, pick-and-place data, and a tidy BOM (Excel or CSV) • Test PCB's with assembly I will review the Gerbers in ViewMate and run a quick fit-check in our enclosure CAD; the project is complete once the files import cleanly and the report answers all open questions. Looking for someone in India, Delhi NCR Region. Thanks

I need a compact firmware-and-hardware solution that lets a PIC microcontroller, programmed with the XC8 compiler, manage a battery-powered power supply built around a lead-acid pack. Here is what I am after: the PIC should start up from the battery, regulate or switch the output rails as required, continuously read the pack voltage, temperature or any other basic health indicators, and trigger clear actions (for example, low-voltage cutoff or status signalling) before the battery reaches critical limits. A simple serial, I²C or even LED indicator scheme is fine for status feedback—as long as I can read the key parameters easily during bench tests. Please base the code on MPLAB X + XC8 so I can compile and tweak it locally. If you prefer a specific mid-range PIC that is re...

I already have a universal BLDC ceiling-fan driver PCB running perfectly from mains power; what it lacks is an Arduino brain. My goal is to plug an Arduino (Uno, Nano, or whichever you prefer) into the existing driver so I can: • adjust fan speed across its full range, • reverse the direction on command, and • set on/off timers, all through a small set of physical push-buttons mounted near the fan. What I need from you is a clean, well-commented sketch plus a minimal wiring diagram that shows exactly where every button, resistor, and logic-level signal ties into the driver board. If any level-shifting, opto-isolation, or triac/FET gating is required, please spell that out and include the component values. Debounced button handling and non-blocking timer logic (e.g., u...

I’m building a proof-of-concept noise-reduction module destined for consumer-grade electronics. My priority is an electronic schematic that delivers two core capabilities: active noise cancellation and echo reduction. The circuit must be small enough to embed in another typical product that will be mentioned later on as the project develops. Here’s the flow I have in mind. First, we collaborate on the signal-processing topology—feed-forward, feedback, or hybrid—then translate it into a detailed schematic and PCB layout (Altium, KiCad, or your preferred EDA). Once the draft design is ready, I’ll need simulations or bench measurements that prove at least 20 dB attenuation in the 50 Hz–2 kHz band while holding latency under 10 ms; please include SPICE plot...

My final-year electrical engineering project is well underway, but I want the written report to reflect the same level of professionalism as the technical work behind it. I will handle all calculations, simulations, and data; what I need is an experienced engineer—or a writer who routinely prepares professional engineering documents—to help me shape that material into a clear, cohesive LaTeX manuscript. I have 2 separate reports to write. The topic of the first is programming and security-related. The second report is analogue circuit-based. As I said i will do all the technical work; I just need help putting these documents together. The submission for these reports is at the beginning of November and should be roughly 30 pages long. Scope of collaboration • Co-writi...

Industrial 220V Power Supply & Machine ON/OFF Control PCB Design I am looking for an experienced Power Electronics / PCB Design Engineer to design a compact industrial power supply and control circuit that will work with our existing IoT device. Main Requirements - Input: 220–240V AC industrial supply - Provide stable DC power to our existing IoT device - IoT device will provide the control signal for Machine ON/OFF - Circuit must safely switch/control the industrial machine using an appropriate relay/contactor/SSR or other suitable solution - The machine load current will pass through or be controlled by the designed switching section - Proper isolation between high-voltage AC and low-voltage IoT electronics - Include necessary protection: fuse, surge protection, over-current...

I need a detailed design for a 600 amp electrical service for a residential building. The primary use will be general household needs, with high-power cooktops as the only significant appliance. Key Requirements: - Design should accommodate 600 amps for a residential building - Primary use is general household consumption - High-power cooktops to be included in the design Ideal Skills and Experience: - Electrical engineering background - Experience in residential service design - Knowledge of high-amperage systems and safety protocols - Ability to provide detailed schematics and load calculations Please include any relevant certifications and past project examples in your bids. must be certified in new mexico

I need a complete set of EPLAN schematics that map out the electrical drivetrain of my vehicle prototype. The focus is strictly on the electric motor and its controller; auxiliary items such as battery packs, charging modules, or transmission layouts are outside this job’s scope for now. You are free to work without binding standards, so feel comfortable applying your own best-practice symbols, macros, and page templates in EPLAN Electric P8. What matters most is clarity, consistent device tagging, and tidy routing so my in-house engineers can drop your file straight into the broader vehicle project. Deliverables • Native EPLAN project file (.elk / .zw1) with all pages clearly labeled • PDF export for quick review • Simple parts list (motor, controller, core co...

We are Safe Instrumentación (Bogotá, Colombia). We design a modular data-acquisition system for geotechnical and industrial instrumentation, with four boards: a main "Brain" (STM32G0B1RE, FRAM, LoRa, LTE modem, RS-485, native USB) and three accessory nodes (vibrating-wire VM501C, inclination SCL3400, and a DS18B20 temperature chain of up to 200 sensors). We already have a working prototype. We do NOT need firmware — we develop it ourselves. We need a senior engineer (or firm) to take the hardware to production: Review and optimize the existing schematics Verify and strengthen protections (ESD, surge, EFT; galvanic isolation on RS-485; reverse-polarity/overcurrent) Optimize power management and consumption (seamless mains/battery switching, low-power modes, l...

I’m building a small consumer-electronics project and need a purpose-built, rectangular PCB that can drive an induction heater at up to 100 W. The board must accept power from either a standard DC adapter or a USB-C PD or DC source, automatically negotiating or routing whichever is connected. Power control is intentionally simple: ten individual LEDs indicate output in 10 W increments (10 W – 100 W), and a single rotary dial steps the power up or down in those same 10 W stages. No screen, menus, or extras—just clean, reliable hardware. What I expect from you • Complete schematic with component values, coil connection, gate-drive stage, protection (over-current / over-temp), and USB-C PD or DC supply trigger circuitry. • PCB layout ready for fabrication...

We are looking for an experienced Mechanical/CAD Designer to design our custom filament 3D printer, GenZ OG. Main Requirements: CoreXY printer Build volume: 200 × 200 × 200 mm Unique modern design, not a standard box shape Complete 3D CAD assembly Frame, toolhead, heated bed and belt-system design Component selection and BOM Manufacturing drawings STEP, STL, DXF and editable CAD files Support for minor corrections during prototype assembly The candidate should have experience designing 3D printers, CNC machines, robotics or similar mechanical products. SolidWorks or Fusion 360 experience is preferred. Please share your relevant portfolio, availability, timeline and final quotation.

I am looking for an electrical engineer / KNX specialist to prepare the complete execution documentation for a residential KNX/DALI installation. The installation itself will be carried out by a local electrician in Switzerland based on the plans and documentation we finalize together. The required scope is divided into three phases: Phase 1 – Design and Planning * Review the architectural plans and requirements * Review and finalize the electrical, KNX and DALI design * Finalize fuse box layout, protection devices and component locations * Finalize conduit and cable planning Phase 2 – Detailed Documentation * Prepare complete fuse box drawings * Prepare detailed 230 V, KNX, DALI and low-voltage wiring diagrams * Prepare conduit and cable schedules showing cable types, size...

PCB Design & Engineering for HydroNest RO Plant Controller 1. Project Objective We are developing a professional controller PCB for commercial/light-commercial RO water treatment plants under HydroNest India. The objective is to take our existing functional requirements, selected components/modules and control logic, and have an experienced electronics engineer design, optimize and finalize the complete electronic controller. We are not looking only for PCB layout work. The engineer should be capable of taking the requirements at a system level and developing the complete electrical design, schematic, component selection/optimization and production-ready PCB. ⸻ 2. What We Will Provide We will provide: * RO plant operating requirements and sequence * List of pumps, solenoid valv...

I need assistance with optimizing and designing a PCB for a water treatment system. I have all the necessary components, including: - TDS sensors - Pressure sensors - Flow sensors - Relays - Float switch - Solenoid valve The ideal freelancer should have experience in: - PCB design - Component optimization - Working with water treatment systems Please provide a printable PCB design for the finished product.

This project takes a brand-new consumer-electronics board from concept all the way to files the factory can put straight on the pick-and-place line. The design is SMT-only and must integrate an on-board Wi-Fi/Bluetooth module, so careful RF layout, impedance-controlled routing and a compact, cost-optimised stack-up are essential. I will share a functional block diagram, mechanical limits and the key IC selections; you translate that information into production-ready hardware. Throughout the process I expect clear, well-documented design files that make future revisions simple. Deliverables • Editable schematic with clear net-naming and annotation • PCB layout observing DFM/DFT rules and vendor constraints • Manufacturing outputs: Gerbers, drill, pick-and-place and ce...

I need a compact, indoor-only training device that keeps my dog or cat within designated areas. The goal is simple behavior correction for containment, not trick teaching or general exercise. When a pet approaches or crosses a virtual or physical boundary, the unit should deliver a very mild shock stimulation—strong enough to deter, yet well within accepted animal-safety standards. Here is what I’m looking for: • A complete concept and schematic for the device, including sensor choice, power requirements, safety circuitry, and enclosure design. • Firmware or control logic that triggers the mild stimulus reliably and only when intended. • A brief user-setup guide so anyone can define or adjust boundaries indoors. If you can add optional sound or light cues ...

I have an industrial-grade product moving from concept into full hardware design, and I want an embedded hardware architect who can also drive a robust multi-layer PCB layout. The work is centred on designing new hardware—not tweaking an existing board—so every decision from component selection to stack-up, power integrity and EMI/EMC strategy has to start from first principles and end in a manufacturable, production-ready package. The equipment will operate inside a factory environment with the usual electrical noise, temperature swings and mechanical vibration, so I’m expecting careful attention to isolation, thermal management and long-term reliability. You’ll translate my functional block diagram into clean schematics, size critical nets, route high-current pat...

# NFC Design Requirements ## 1. Basic Requirements * **NFC Frequency:** 13.56 MHz * **NFC IC Supply:** 3.3 V * **NFC IC:** NXP NFC IC * **Host MCU:** ESP32 / selected MCU * **Communication:** I²C * **Antenna:** PCB loop antenna * **Target NFC Range:** 20–30 mm * **PCB:** 2-layer PCB preferred * **Operating Temperature:** -20°C to +70°C ## 2. NFC Antenna * PCB antenna shall be designed for **13.56 MHz**. * Antenna dimensions shall be optimized based on available PCB space. * Keep ground copper away from the antenna area. * Keep battery and other metal objects away from the antenna where possible. * Antenna matching components shall be provided for tuning. ## 3. Power * NFC IC supply: **3.3 V** * Provide local decoupling capacitors near the NFC IC. * NFC supply shall...

I’m building a compact IoT board that can collect sensor data, push it wirelessly to the cloud, and drive simple actuators—all on one reliable PCB. At the heart of the design I need a low-power microcontroller paired with the necessary sensors; wireless connectivity (Wi-Fi, Bluetooth or whichever protocol you recommend) will complete the link to the outside world. Here’s what I expect you to deliver: • Schematic and PCB layout files (Altium, KiCad, or similar) • Optimised BoM with readily available parts • Gerbers, pick-and-place, and fabrication notes • Basic firmware pin-map to confirm that the microcontroller, sensors, and control lines are correctly routed Please send a concise but detailed project proposal that shows how you’ll hit...

I’m ready to pair an ECOFLOW Delta Ultra Pro Ultra Whole Home (12 KWH solution) and Smart Home Panel 2 with the solar panels already on my roof, so that I have reliable backup power whenever the grid goes down. My panels are functioning well, but I’m not sure whether the current setup includes a compatible inverter or if it will need to be upgraded or replaced. What matters most is that critical loads—air conditioner, fridge, a few lights, Wi-Fi, and similar essentials—stay on when an outage hits. I’ll need you to: • Inspect the existing solar wiring, combiner box, and any inverter that might already be in place. • Design and install the battery, the Smart Home Panel 2, and all necessary breakers or sub-panels to isolate those essential ci...

I have a new electronic concept that now needs to move from idea to a working prototype, and I want it laid out in Autodesk EAGLE. Your task is to design a prototype-ready PCB that brings together three key blocks: a microcontroller core, several on-board sensors, and a stable power-supply section. I will provide the preliminary schematic notes and the part shortlist; you handle the full schematic capture, board layout, DRC/ERC checks and the usual clean-up so the files are manufacturing-ready. Please keep the board footprint compact and component placement serviceable for hand-assembly during the first test run. Deliverables I expect • .sch and .brd files from Eagle • Gerber and drill set zipped for the fab house • A concise BOM with manufacturer part numbers &b...

The project centres on a multi-layer PCB that will drive a forthcoming medical device and must operate cleanly across the 20 kHz – 3 MHz band. I already have the core schematic; what I need now is expert layout, stack-up definition, and routing that meet stringent RF EMI/EMC requirements so the board sails through pre-compliance testing. You will shape the layer stack, place and route all high-speed and analogue lines, define controlled-impedance traces, and plan return-path strategy to minimise emissions and susceptibility. Particular attention should be paid to: • Low-frequency RF front-end sections (20 kHz-3 MHz) • Isolation and creepage/clearance rules for medical-grade safety • Proper partitioning of analogue, digital, and power domains • Filter, shie...

Ik zoek iemand die voor een commerciële elektrische installatie een volledig ééndraadschema opstelt volgens NEN 1010. Wat ik aanlever • Een voorbeeldschema ter referentie • Ruwe lijst met alle groepen en verbruikers Wat jij oplevert • Een duidelijk, professioneel schema in AutoCAD (of vergelijkbaar CAD-pakket) • Alle circuitgroepen overzichtelijk benoemd • Aarding en aardlekschakelaars exact gepositioneerd • Specificaties van apparaten en belastingen per groep vermeld Belangrijk – Het schema moet strikt voldoen aan de NEN 1010-richtlijnen. – Bestandsformaten: dwg én een leesbare PDF. – Heldere layer-structuur en benamingen zodat collega-installateurs het makkelijk kunnen aanpassen. Heb j...

Taşınabilir bir kontrolcü tasarlıyorum; ESP32, ekran ve joystick gibi tüm bileşenler elimde fakat ekranın ESP32’ye doğru şekilde bağlanması ve çalıştırılması için desteğe ihtiyacım var. Öncelikli hedefim: • Ekranın ESP32’ye hatasız fiziksel bağlantısı (pin planı, güç hatları, arka ışık kontrolü). • Uygun sürücü kütüphanesini (örn. TFT_eSPI, LCD, OLED vb.) yapılandırıp örnek kodla görüntü alabilmek. • Joystick okuma kodunu ekranda canlı gösterecek basit bir demo hazırlamak (isteğe bağlı, zaman elverirse). Benden beklenen çıktı: 1. Kısa sürede uygulanabilir bağlantı şeması (KiCad, Fritzing veya PDF). 2. Çalışır örnek kaynak ko...