Circuit Design Jobs

I need a small pcb board powered by 9V battery that is connected with the board through a JST-ph 2.0 mm 2 pin connector The board has one 9V+ and 9V- output and 9V Input 1 en 2 with a JST-ph 2.0 mm 4-pin connector that will be connected with a healthcare sensor. The board has one 9V relays that will be active when input 1 is active, the relay has a NO/NC/9V- output with a JST-ph 2.0 mm 3-pin connector called "Fall" The board has one 9V relays that will be active when input 2 is active, the relay has a NO/NC/9V- output with a JST-ph 2.0 mm 3-pin connector called "Move" The third relay is for low battery detection of the 9V input. The system should trigger when the battery voltage drops to 6V or 10% of the full capacity. The relay have a NO/NC/9V- output with a JST-...

I’m building a compact electrolysis hair-removal unit and need a full schematic and PCB layout that an assembler can take straight to production. Core requirements • Control core: ESP32 must set DC voltage (0–24 V), DC current (0–5 mA) and RF power (up to 2 W at 13.56 MHz). Hard cap current limit for DC, the power supply must be unable to supply more for safety. • Dual-path power: DC and RF run independently yet may operate simultaneously. The RF path travels down the probe needle, which is the DC low-side return. A bias-tee approach seems most practical; I’m open to alternative RF/DC combining networks if you can justify them. • High-side connection: the positive DC terminal links to a metal plate the user sits on. If a negative-rail design is e...

I need a seasoned KiCad specialist to turn my wearable health-band concept into a production-ready, multi-layer PCB. The board’s sole purpose is data communication, and it must do so over Bluetooth using a Nordic Semiconductor microcontroller (nRF52 family or a comparable part you can justify). You will start from my block diagram and recommended component set, refine the schematic, route the multi-layer stack with controlled impedance for the RF section, and deliver gerbers, pick-and-place, and a clean BOM. KiCad 7 is preferred so I can review your work without back-porting issues. Deliverables • Complete KiCad project folder (schematic, PCB layout, libraries) • Gerber & drill files, assembly outputs, and BOM ready for a board house • Brief design repo...

I have a project that calls for a digital-only signal-processing circuit of moderate complexity. I already know the functional blocks I need, but I’m looking for a clean, production-ready schematic that I can move straight into PCB layout and prototyping. Here’s what I need from you: • A complete schematic (Altium, KiCad, OrCAD, or similar) with clearly labelled nets and hierarchy. • A concise bill of materials with part numbers that are currently available from mainstream suppliers. • Brief design notes covering key timing considerations, expected clock domains, and any special layout constraints. • Simulation or verification output that demonstrates the circuit meets the stated digital signal-processing function (SPICE, ModelSim, or an equivalent to...

I’m refining a compact control-circuit project that must live on a single-layer PCB. The board will carry a mix of surface-mount and through-hole parts, so the layout has to respect clearances for hand-soldered TH components while still keeping the SMD side tight and economical. All external wiring will come in through pin headers and terminal blocks only; no USB or other connectors are required. Please keep these plugins clustered along one edge for easy panel access. Because I need occasional face-to-face reviews and quick hand-off of early prototypes, I can only work with designers located in New Delhi (or who can meet there) for this project. This is important as the PCB design must align with specific enclosure dimensions that I'll provide during meetings. What you&rsquo...

The project involves modifying an existing 2-layer automotive printed circuit board (PCB) with approximate dimensions of 100 mm × 80 mm (to be confirmed after reviewing the source files). The board contains approximately 80 to 120 electronic components, including power MOSFETs, passive components, connectors, protection devices, and a microcontroller-based control circuit. The objective is to implement a series of hardware improvements while preserving the overall architecture and functionality of the existing design. The required modifications include updating the schematic to incorporate new passive components and revised values, modifying the power switching circuitry, replacing selected components, improving PCB routing in the affected areas, adjusting copper pours and clearance...

I need a Single Line Diagram (SLD) for a house battery application to support a Western Power solar connection request. Have all the information on a dwg already just need it presented correctly. Will supply example of previously approved, just 1 dwg. Ideal skills: - Electrical engineering expertise - Experience with solar systems and Western Power applications - Proficiency in creating detailed SLDs - Knowledge of safety standards and compliance requirements

Urgent for next 24 hours I need comprehensive electrical drawings for four flats in London, adhering to British Standards. The drawings should include: - Wiring diagrams - Circuit layout - Panel schedules Coverage areas include: - Living areas - Kitchens - Bathrooms - Communal areas Ideal skills and experience: - Expertise in electrical design - Familiarity with British Standards - Proficient in creating detailed wiring diagrams, circuit layouts, and panel schedules - Experience with residential electrical systems

أرغب في إنجاز مشروع تجريبي صغير لِعَدٍّ ثنائي البِت مبني بالكامل على الترانزستورات (من دون أي دوائر متكاملة). ما أحتاجه بالتحديد هو مشاركتي التصميم العملي للدائرة مع كل الحسابات وتوضيح المكونات، • أي لقطات محاكاة أو قياسات تثبت أن العداد يعدّ 00-01-10-11 بشكل متكرر. هذا الرابط يوضح ما احتاجه

I'm seeking an experienced PCB designer to create a multi-layer PCB for a consumer electronics radio device. The PCB will need to interface with microcontrollers and sensors. Key Requirements: - Expertise in multi-layer PCB design - Experience with consumer electronics, especially radio devices - Ability to integrate microcontrollers and sensors Ideal Skills and Experience: - Proficiency in PCB design software (e.g., Altium, Eagle) - Strong background in electronics and circuit design - Previous experience with radio frequency (RF) applications is a plus - Attention to detail and commitment to quality - Experience in designing of boards with components which can communicate via Wifi - Programming in Arduino - Familiar with ESP32 dev board programming Please share your portfolio and...

I am midway through an online electrical training program and still have two graded components left in each module: the “learning activity” and the “content quiz.” Both are multiple-choice, can be retaken without limit, and I need a final score of 90 % or higher on every attempt that counts toward my record. You will receive screen-shots of every unfinished unit plus login access so you can work directly in the platform. Feel free to lean on AI tools or any personal reference material; the school places no restriction on outside resources. When you reply, please mention any hands-on electrical background, coursework, or certifications that show you can navigate these topics confidently. Deliverables • All remaining learning activities submitted with ≥...

I need a redesign of an existing breakout board prototype with the following requirements: 1. Remove all pinholes. 2. Ensure the design is firm and avoids communication issues. 3. Dimensions should be 80x50mm, including holes for installing the board. 4. Include accurate routing of 60 lines end-to-end, aligning them with the 60-pin adapter provided in the attachment. 5. Incorporate FPC 40 and FPC 12 slots (0.5mm pitch). 6. Add 8 connections with 4x2 standard female pinholes (2.5mm pitch), aligned with the FPCs and routed to match the 60 pins of the adapter. 7. Follow the attached concept for reference, but ensure correct routing alignment for all lines. Deliverables should include updated source design files and Gerbers ready for production.

This project centres on a compact embedded platform that will sit inside an industrial automation cabinet and take charge of continuous monitoring and control. At its core the board must read an oxygen sensor, process the signal locally, apply any calibration curves, and then drive a pair of digital outputs that feed the plant’s PLC. A small TFT or OLED status screen and a Modbus-RTU port over RS-485 will round out the human-machine and network interfaces. I will provide the exact sensor datasheet, operating ranges, and the enclosure footprint; you handle everything from component selection to fully-routed Gerber files and production-ready firmware. Key deliverables • Schematic capture and multilayer PCB layout (KiCad or Altium) matching my mechanical constraints • BO...

I’ve completed the first-pass schematics and PCB layout for a carrier board built around the Raspberry Pi Compute Module 5. The design includes an on-board power stage, GPIO break-outs, and several high-speed USB links. Before I freeze the design, I need a fresh pair of expert eyes to vet the work against recognised industry best practices, with the main goal of confirming that the overall layout and connectivity are solid. What I expect from you is a thorough design review that covers the entire schematic and the four-layer stack-up, calls out any routing, decoupling, impedance-control or component-placement issues, and flags potential power-integrity or USB signal-integrity traps—even minor ones I may have missed. Please apply standard DFM/DFT thinking in your feedback so th...

I need an electrical design expert for a wastewater treatment plant project. The design should comprehensively cover: - Control Panels - Distribution Systems - Instrumentation Ideal skills and experience: - Electrical engineering degree - Experience in wastewater treatment plant design - Seal and stamp plans - Proficiency with control systems and instrumentation - Strong understanding of electrical distribution systems - Professional Electrical Engineer Maryland License Looking forward to your proposals!

I'm seeking an experienced engineer to connect push-button electronic switches to linear actuator mechanisms. This setup is intended to automate a process. Key Requirements: - Expertise in integrating electronic switches with actuators - Proficiency with push-button switches and linear actuators - Knowledge of automation systems and safety protocols - Strong problem-solving skills Ideal Skills and Experience: - Electrical engineering background - Hands-on experience with automation projects - Familiarity with wiring and circuitry Please provide examples of similar work and relevant qualifications.

I have a steady flow of electrical projects that range from single-family homes to busy commercial spaces and light industrial facilities, and I need one reliable, licensed electrician who can confidently take on every aspect of the work. On the residential side you’ll be handling complete wiring or rewiring, main service and sub-panel upgrades, and both interior and exterior lighting installations. The jobs can involve any room in the house—living areas, bedrooms, kitchens, bathrooms, garages, even patios and garden zones—so versatility and clean workmanship are essential. Beyond homes, I also receive commercial and industrial calls that demand the same level of precision and code compliance. If you can read plans, size conductors correctly, pull permits when required,...

I have an all-analog circuit that I now need translated into a clean, production-ready hardware package. The job is two-fold: first, capture the complete schematic; second, turn that schematic into a compact, battery-powered PCB layout that is ready for fabrication. Because every stage is strictly analog, component placement, trace routing, and grounding must be treated with the usual care to keep noise and drift to a minimum. The board will run solely from a battery supply, so please incorporate thoughtful power-rail filtering, low-quiescent-current regulators where helpful, and clear test points for current-consumption checks. I’m comfortable with KiCad, Altium Designer, or Eagle—use whichever you prefer, as long as the final files are fully editable. Deliverables • E...

I need single-sided, double-sided, and full multi-layer PCB layouts created for mixed-signal work. The boards combine analog and digital circuitry and will be used across embedded control, RF, and other high-speed applications, so careful impedance control, differential-pair routing, and solid mixed-signal grounding are essential. Altium Designer is my main environment, yet I can seamlessly integrate files produced in Proteus, KiCAD, Eagle CAD, EasyEDA, or even Multisim, so feel free to use whichever of those platforms fits your workflow best. What I expect from you: • Complete schematic capture and net-validation • Fully routed PCB layout that passes DRC and is ready for fabrication • Gerber (or ODB++) files, drill data, and a clean BOM suitable for procurement ...

I need a Pre-Amp with volume, bass, and treble controls designed for professional audio equipment. Additionally, I require a 2-way and 3-way Active Cross-Over that is variable, paired with a high-power Class D Power Amplifier capable of delivering between 100W to 500W. The setup should be suited for professional audio applications. Key Requirements: - Features: Pre-Amp with Volume, Bass, Treble, and Variable Active Cross-Over (2-way and 3-way) - Inputs supported: XLR and RCA - Power Output: 100W to 500W Class D Power Amp Preference: - Engineers located in India Ideal Skills and Experience: - Expertise in designing Pre-Amplifiers and Class D Power Amplifiers - Experience with Active Cross-Overs (both 2-way and 3-way) - Knowledge of professional audio equipment design and integration - Pr...

I have a complete written pinout for a small board built around an ESP32-WROOM module, I have the circuit assembled with bare wires and I now need that schematic made in cad as a two-layer PCB in KiCad. The board will have two LDO regulators, a TP4055 Li-ion charger, an STI3408B buck converter and a 24-pin FPC connector for a camera, and assorted passive components. The more compact the pcb the better. You will receive: • the pin-by-pin connection list and a sample kicad assembly with the components all on it. What I expect back: • the complete KiCad project (schematic, PCB, libraries) • production-ready Gerber/NC drill files

I need a high-voltage gas insulated switchgear (GIS) consultant designed specifically for industrial applications. The switchgear must operate at voltages 138kV and prioritize a compact design. Key Requirements: - High-voltage operation ( 138kV) - Compact design for space efficiency - Suitable for industrial applications Ideal Skills and Experience: - Expertise in designing gas insulated switchgear - Strong background in high-voltage electrical systems - Experience with industrial application requirements - Ability to create compact and efficient designs You must have demonstrated experience with at least 5 major industrial or utility projects whith 69KV or higher GIS gear installation. References must be supplied and will be verified. Please provide examples of previou...

I'm looking for an experienced PCB designer to create a control board for my standby generator. The PCB should manage an Automatic Transfer Switch (ATS) and engine control, and should include: SPARXX ATS REV A – PCB DESIGN SPECIFICATION Project Design a production-ready PCB-based Automatic Transfer Switch (ATS) controller to replace an existing relay/timer panel while maintaining the same operating logic. Deliverables Required Complete KiCad 9 project Schematics PCB Layout BOM Gerber files Pick and Place files Programming header Source files PCB Size Approximately 3.5" × 7" × 0.5" maximum Reserve approximately 20% of board space for future expansion. Power Inputs: 120 VAC 12 VDC Generator Supply Board must automatically power from either sour...

I’m building a compact, 4–6-layer mixed-signal board that will sit at the heart of a new sensor-interface product. The board must collect analog data, run it through an on-board DSP, and then push results out over Wi-Fi, Bluetooth, and a cellular link. To keep the unit fully portable, all power must be managed through an integrated battery management system, including charging, protection, and efficient rail generation for the analog, digital, and RF domains. Here’s what I need from you, start to finish: • Complete schematic capture with full part selection, paying special attention to RF front-ends, low-noise sensor inputs, the DSP section, and the battery management circuitry. • A 4–6 layer stack-up that cleanly separates noisy digital, sensitive ana...

I’m building a handheld device that lets me roll a ball across any flat surface and have it actively steer itself so the pen mounted inside draws in the exact direction I choose. An optical-flow sensor will read surface motion, my code will translate that into heading commands, and two small motors inside the ball will supply the corrective spin. The overall sketch is already under way, but I need a specialist who knows Arduino-style hardware and, more importantly, how to marry miniature motors with an ESP32-C module for precise directional control of the ball. Your main focus will be advising on the right motor format, driver circuitry, power budgeting, and the physical/electrical integration so the firmware can call simple functions like setHeading() or setVelocity(). I’m ...

We are Unikeyic, a global electronic components distributor, and we are looking for experienced technical writers for a long-term collaboration. If you have a background in electronics engineering and enjoy writing high-quality technical content, we'd love to hear from you. What You'll Do You will write original technical articles related to electronic components and circuit design, including topics such as: Semiconductor devices Passive components PCB design Embedded systems Power management Electronic component selection Industrial automation IoT applications Electronic engineering tutorials The article title, outline, target keywords, and writing requirements will all be provided by us. Requirements To be considered, please make sure you meet most of the following require...

I'm seeking an experienced RF circuit designer to develop an RF amplifier. The amplifier should operate in the high-frequency range of 3 GHz to 30 GHz, with a medium output power level between 1W and 10W. Ideal Skills and Experience: - Expertise in RF circuit design - Proficiency in working with high-frequency components - Experience with medium power RF amplifiers - Knowledge of stability and linearity in RF circuits - Familiarity with simulation tools (e.g., ADS, HFSS) Please provide relevant work samples and a brief project plan.

I’m developing a signal-processing module and need a purpose-built power inverter circuit to drive it reliably from a 12 V DC source. The job centres on circuit design; PCB work can follow later once the schematic is locked down. Here’s what I’m looking for: • A complete schematic for a high-efficiency DC-to-AC inverter that delivers clean, low-ripple rails suitable for sensitive analogue and mixed-signal stages. • Component selection with readily available parts and clear justification for each choice. • SPICE-level simulations (LTspice, PSpice or similar) showing expected efficiency, output wave-form quality and thermal performance under 25 W continuous load. • A brief design report summarising calculations, key assumptions and any trade-offs ...

我已从设备上安全拆下 7037IC 芯片，物理状态完好。现在希望在对芯片零损伤的前提下，一次性读取出其中的手机操作系统固件。为协助你完成工作，我可以提供： • 高分辨率引脚照片 • 电路连接信息 • 芯片实物寄送 首选方案是使用 JTAG 工具；若你建议配合 ISP 编程器、NAND Flash 编程器或其他专用设备，也请说明理由与流程。此外，请注明您所用的提取设备型号。 交付要求: 1. 读取并生成完整可验证的操作系统固件映像（BIN 或 HEX）。 2. 同步提交哈希值或其他完整性校验证明，确保数据无缺失、无篡改。 3. 附一份简要读取日志或说明文件，便于我后续分析。 4. 如在提取过程中顺带获得基带或引导固件，请仅在说明中备注，交付物仍以操作系统固件为准。 我们优先寻找对苹果手机芯片底层代码有深入了解且具备苹果电池7037IC芯片相关经验的专业人士。期待你分享过往使用 JTAG（或相关工具）成功提取芯片数据的案例，说明所用设备、步骤及为何对芯片安全。请在接手后于一个月内完成全部交付。 如果你擅长精确引脚定位、信号完整性处理、低电压读取等细节，欢迎提出你的方案——我会根据专业程度与成功率优先选择合作。

Estoy desarrollando un proyecto personal y necesito el diseño de un PCB que me sirva como prototipo de prueba. El circuito debe combinar dos requisitos clave: alta durabilidad y bajo costo en la fabricación. Conexión wemos d1 r2 + módulo rfid lora + módulo r200 uhf rfid + solar charger 18650 Qué espero recibir • Esquema eléctrico completo. • Diseño del PCB listo para producción (archivos Gerber, lista de taladros y diagramas de montaje). Lineamientos técnicos • Pistas y separaciones acorde a buenas prácticas de fiabilidad. • Selección de materiales y acabados pensados para soportar uso repetido en un entorno de laboratorio personal. • Número de capas optimizado par...