电路设计 Jobs

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

Have a working circuit diagram for a device based on the ESP32-WROOM-32E module. The system is powered from an external supply (5V / 8V / 12V). The next step is to convert this schematic into a complete, production-ready, single-sided PCB design using Altium Designer. Scope of Work The objective is to develop a fully functional and manufacturable PCB design that meets the following requirements: Convert the provided circuit diagram into a clean, well-structured schematic in Altium Designer Design an optimised single-layer/double-layer PCB layout Ensure the PCB strictly follows the fixed board outline dimensions (to be provided) Implement clear silkscreen labelling for all components and connectors Optimise component placement and routing for reliability and manufacturability Deliverab...

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 need a skilled embedded systems engineer to integrate the VS1010 for audio playback and recording in an embedded system. The VS1010 should specifically support WAV file format. Key Requirements: - Implement VS1010 for WAV audio playback - Integrate into an embedded system Ideal Skills and Experience: - Experience with VS1010 and audio processing - Strong embedded systems development background - Proficiency in handling WAV audio files Please provide examples of previous similar work.

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 ...

i want a PCB for in-situ, real-time verification of sensor integrity in a live without interrupting the control process of components of PCB for cooling, heating and humidity, communication ports and AutoDetect sensor frailer equipment' because hardware often operates in controlled, safety-critical, and validated environments layout Design with components of advanced PCB for control /set point and manage temp of cooling sensor , heating sensor and humidity sensors, light sensor, proximity sensor, water low sensor, pressure sensor, high/low voltage sensor, wire and wireless commination ports lan, usb, can bus, rs-485 etc, processor, ram, memory, and AutoDetect sensor frailer, all types of alarms like heater, compressor, open door, high/low temperature with voltage protection, tempe...

I’m holding an ageing but still functional dual-channel, 80 A DC reverse controller that was built for industrial truck-tarp systems about fifteen years ago. The original supplier is long gone and all I have left is the bare hardware in my hands—no CAD files, no schematics. To get this product back into reliable production I need you to capture the existing board and deliver a fresh manufacturing package that any modern fab house can use. I’ll supply high-resolution photographs of both sides, detailed close-ups of critical sections, and shots that include vernier-scale references so dimensional data can be extracted accurately. Scope of work • Reverse-engineer the circuitry into a clear single-line diagram that reflects the dual-channel, high-current H-bridge t...

I need a production-ready printed circuit board for a compact consumer-electronics tracker. The board has to combine Bluetooth connectivity for smartphone pairing, GNSS positioning for global location data, a LoRa module for long-range updates, and a 3-axis motion sensor to wake the unit only when it moves. Everything will run from a single rechargeable battery, so careful power budgeting and a low-power microcontroller are essential. Form-factor will be small enough to slip into a key-tag style enclosure, so component height and antenna placement must be considered from the start. I’m flexible on the exact silicon—Nordic, Espressif, STM, Semtech, etc.—as long as you can justify part choice against current draw, cost and global availability. Please take the design from ...

We are OMM Enterprises, a company engaged in machine manufacturing and sales, including paper plate machines, roti making machines, and other automation equipment. We are looking for a practical Pneumatic Design Engineer or Freelancer who can help us design and improve pneumatic systems for our machines. --- Scope of Work: - Design simple and efficient pneumatic circuits - Suggest suitable components (cylinders, valves, compressors, fittings) - Create technical drawings and layouts (AutoCAD / SolidWorks preferred) - Focus on cost-effective and reliable system design - Provide guidance during implementation if required --- Requirements: - Experience in pneumatic system design or machine design - Basic understanding of industrial automation - Ability to create practical, working desig...

I have three interconnected PCBs for an IoT-enabled cooking system and I need a fresh, expert set of eyes on the schematics before they move to layout and certification. My main objective is to drive up reliability while making sure every track and component choice can sail through both UKCA and CE assessments without last-minute redesigns. Here is the current state of play: • Power PCB – handles distribution and uses fully-isolated 12 V AC relays • Controller PCB – AVR32DD32 MCU with four MAX31865 RTD ADCs and RS-485 bus • UI PCB – ESP32 (external esp32 approved antenna), RS-485 bus, 5-inch EVE4 touch screen, 4 x multicolour LEDs and audio out The Power board, the Controller board and the UI board all matter equally to me in terms of long-term robu...

I need a clean, well-commented Arduino sketch that drives a small traffic-light prototype using LEDs, push-buttons, and a couple of sensors (e.g., ultrasonic or IR) to regulate flow rather than just cycle through a fixed sequence. The idea is to simulate a real intersection where vehicle presence triggers state changes while manual override buttons allow testing of special conditions. Here’s what I expect: • The code must compile on the current Arduino IDE without extra libraries beyond the standard ones. • Normal operation: red, yellow, and green LEDs follow proper timing, but a vehicle-detection sensor shortens or extends green time to keep traffic moving smoothly. • A pedestrian button interrupts the flow safely, inserting a walk phase before resuming. &bul...

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I’m refining a set of custom boards that combine an FPGA-based signal generator with several ESP32 modules. The immediate gap is in analog and digital circuit design: I need a fresh set of eyes to review, debug, and improve the front-end and conditioning stages so our multi-channel waveforms stay clean from kHz up into the low-MHz range. You will also find yourself touching the programmable logic; I use both VHDL and Verilog, so fluency in either (or ideally both) is welcome when tweaks to the signal-generation core are required. On the microcontroller side each ESP32 handles data processing, manages communication protocols, and drives attached peripherals, all written in C/C++. Expect to dive into that firmware whenever hardware changes ripple upward. Key objectives • A...

I need a complete PCB solution for a BeagleBone-based light pod whose primary purpose is, quite simply, “Lightpod.” The concept is already proven on a breadboard; now I want a production-ready board that consolidates the BeagleBone, LED drivers and all supporting circuitry into a compact, manufacturable form factor. What I expect from you • Schematic capture that respects BeagleBone design guidelines and pin-muxing constraints • Optimised PCB layout compatible with standard four-layer fabrication, mindful of thermal paths for high-current LED channels • Clean, clearly annotated BOM with sourcing that avoids hard-to-find parts • Manufacturing outputs (Gerbers, drill files, assembly drawings) plus original design files so I can iterate later in KiCa...

I need a clean, production-ready multi-layer PCB for a new consumer-electronics device. The board will host an average number of components—nothing exotic—but the layout must still respect typical high-speed, signal-integrity, and power-distribution guidelines so the final product performs reliably and passes EMC tests the first time. You will begin from my preliminary schematic and functional block diagram, refine component selection where needed, then build out the full stack-up and routing. I’m comfortable with Altium Designer, KiCad, or Eagle files, so choose whichever platform lets you work fastest; just note that I will need fully editable source files at hand-off. To keep the process straightforward, here’s what I expect at each stage: • Updated schema...

I’m building a compact embedded platform that runs from a single 12 V supply and I need a purpose-built PCB to act as the system’s brain. The board has to host a microcontroller at its core, interface cleanly with several sensors, and drive multiple actuators, all while keeping noise low and layout tight. Here’s what I’m looking for: • Complete schematic capture showing microcontroller, sensor inputs, actuator drivers, power-conditioning and protection circuitry • PCB layout ready for manufacture (Gerber/ODB++ files, drill, pick-and-place, clear layer stack details) • Bill of materials with part numbers that are currently available from major distributors • Basic power-up simulation or design rule check report proving the 12 V rail and o...

I need a clear, ready-to-build circuit diagram that closes the voltage feedback loop on the DC bus of an off-grid inverter running in the 12 V – 24 V range. The diagram must show how a suitable voltage sensor feeds a microcontroller so the firmware can keep the bus voltage within safe limits and trigger protective actions when it strays. Please size all resistive dividers, isolation devices (if required), and any signal-conditioning stages so the microcontroller’s ADC receives a clean, scalable signal. What I expect from you • Complete schematic, preferably drawn in KiCad or Altium, showing the microcontroller, voltage sensor path, power supply rails, and any filtering or isolation you recommend. • Short bill of materials with part numbers that are actually ...

My Texas Instruments LM5170EVM-BIDIR board refuses to deliver any output voltage when I switch it to buck mode. Boost mode also does not run, so I’m convinced the fault is somewhere in power stage or its sensing network. I haven’t probed or ruled anything out yet—no continuity checks, no component swaps—so you’ll be starting with a completely untouched setup. I do have both a multimeter and an oscilloscope on the bench, so I can feed you real-time measurements, screenshots, or scope traces as we move through your diagnostic plan. A hardware-level approach is exactly what I’m after: schematic review, expected waveforms, component-level tests, and, if it comes to it, guidance on swapping parts or jumpers to bring the regulator to life. Description: Contr...

I need an interface connector for carrying sensor readings from Ultrasonic datalogger by Modbus cable RS-485 with a male connector. The PCB interface is to be built with a 6-pin military female connector at one end and printer cable connector at the other end that will be used to connect to a laptop USB port to download the data (Refer to picture attached). Requirements: - Use a female 6 pin military connector (standard adapter) for the military connector and a female print cable connector on the other end, with PCB in between - No custom cable is needed - Ensure compatibility with Modbus protocol - Encapsulate the PCB into aluminium pot or similar for robustness Ideal Skills and Experience: - Expertise in Modbus communication - Experience with military and printer cable connectors - ...

Necesito sustituir mi inversor actual por un inversor híbrido solar y dejarlo funcionando junto a un banco de baterías de entre 5 y 10 kWh. El trabajo incluye, además, mejorar el tablero eléctrico existente. Alcance principal • Retirar el inversor instalado y colocar el nuevo inversor híbrido solar. • Conectar y configurar las baterías (capacidad total dentro del rango indicado) asegurando una gestión eficiente de carga y descarga. • Actualizar los componentes antiguos del tablero: breakers, cableado o rieles que ya no cumplan normativa. • Incorporar un sistema tipo isla para que la instalación pueda funcionar de forma autónoma en caso de corte de red. • Verificar protecciones, puesta a tierra y correc...

We are OMM Enterprises, a company engaged in machine manufacturing and sales, including paper plate machines, roti making machines, and other automation equipment. We are looking for a practical Pneumatic Design Engineer or Freelancer who can help us design and improve pneumatic systems for our machines. --- Scope of Work: - Design simple and efficient pneumatic circuits - Suggest suitable components (cylinders, valves, compressors, fittings) - Create technical drawings and layouts (AutoCAD / SolidWorks preferred) - Focus on cost-effective and reliable system design - Provide guidance during implementation if required --- Requirements: - Experience in pneumatic system design or machine design - Basic understanding of industrial automation - Ability to create practical, working desig...

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I have a working PoE injector board in hand and need a clear, engineer-level breakdown of how it does what it does. Your analysis should cover three areas: • Power-delivery mechanism • Data-transfer process • Component layout and individual part functions All I can supply right now are high-resolution digital images of the board—there are no original schematics or datasheets—so the first task is a reverse-engineering exercise. I expect a concise report that reconstructs the schematic as far as practical, explains each power and data path, identifies every major component, and highlights any design choices that stand out. Please include recommendations on performance limits, potential failure points, and where improvements could be made. A well-annotated ...

Need help for two questions cadence spice simulation budget 30$ plz check the attachment

I'm converting my food truck's power system from acid lead batteries to lithium. I need an experienced engineer to assist with the installation of a new converter and ensure the wiring is suitable for the new power source. Key tasks: - Install a converter that has a power of 5kW, suitable for a 60V battery input, and can charge the batteries with 240V mains voltage - Partially rewire to accommodate the new system (assume thicker wires now needed) This is for an electric food truck. Simple wiring is already in place & visible. Batteries are being built and installed by experts i SE5, London. Can be flexible on timings. as I need to source the converter. Ideal skills and experience: - Electrical engineering background - Experience with food truck or vehicle power systems ...

I'm looking for an experienced Arduino programmer to create a microcontroller-based shooting target system. The system will feature 20 targets spread over a wall, with individual LEDs that randomly light up and a sound effect when a target is hit. Key Requirements: - 20 targets with individual LEDs - LEDs randomly lit - Arduino-based microcontroller - Sound effect on hit Ideal Skills and Experience: - Proficiency in Arduino programming - Experience with individual LED control - Knowledge of sound integration with microcontrollers - Background in electronics and circuit design Please provide relevant experience in your bids.

I'm seeking an electrical engineer with expertise in renewable energy systems to assist in validating designs and finalizing engineering plans for a hybrid power system. Must have experience with VICTRON ENERGY Components. The system will primarily integrate solar power with an LP/gas generator, and potentially incorporate hydropower. Key Tasks: - Validate and refine design for efficiency - Specify wire gauging - Ensure cohesive system design- Review and validate system concepts - Perform load analysis and system modeling - Design hybrid power system architecture - Size and integrate battery storage systems - Integrate generators with solar and storage - Develop electrical schematics and diagrams - Ensure compliance with U.S. electrical codes and interconnection requirements - Prep...

I am looking to hire a licensed and experienced electrician in Virginia to inspect and repair an issue with my display wall lighting. The lighting is currently partially not working, and I need someone who can: Diagnose the electrical issue Identify the cause of the partial failure Repair or replace any faulty wiring or components Ensure the lighting is fully functional and safe Location Virginia (on-site service required) Requirements Valid Virginia electrical license/certification Proven experience with residential electrical repairs Ability to troubleshoot lighting systems Must be reliable and professional

I'm seeking a skilled project designer for a commercial electrical project. The work involves creating detailed designs using KiCad. Key requirements include: - Proficiency in KiCad - Experience with footprints, Gerber files, and schematics - Background in commercial electrical systems Ideal candidates will have: - Relevant certifications - Strong attention to detail - Ability to meet deadlines Please provide samples of previous work and a timeline for completion.

I already have an ESP32-C3 prototype of AutoSmear running reliably on a hand-wired board, but now it is time to turn that lab-bench tangle into a production-ready PCB. Compact layout is my top priority: the board must fit inside the existing enclosure while leaving room for future shielding and airflow. Just as important, the A4988 motor driver needs to be integrated cleanly so the stepper that moves the blood-film spreader glides without vibration or jerks. What I will hand over to you • Tested firmware ( ESP32-C3) • Current schematic, wiring diagram and BOM • Mechanical constraints for board outline and mounting points What I need back • Updated schematic reflecting any refinements you suggest • Space-efficient multilayer PCB layout with proper ground...

We are looking for an experienced PCB Designer / Electronics Consultant with proven expertise in ATEX / IECEx standards to support the design and development of a PCB intended for use in hazardous (explosive) environments. The selected candidate will be responsible for ensuring that the design complies with relevant standards and can successfully pass certification requirements. Scope of Work: Design and review PCB in compliance with: ATEX Directive 2014/34/EU IECEx Scheme IEC 60079 standards (especially 60079-0 and 60079-11 for intrinsic safety) Provide guidance on protection methods (e.g., Intrinsic Safety – Ex i, Increased Safety – Ex e, etc.) Ensure proper implementation of: Creepage and clearance distances Energy limitation and fault tolerance Component selection and de...

We are looking for an experienced PCB Designer / Electronics Consultant with proven expertise in ATEX / IECEx standards to support the design and development of a PCB intended for use in hazardous (explosive) environments. The selected candidate will be responsible for ensuring that the design complies with relevant standards and can successfully pass certification requirements. Scope of Work: Design and review PCB in compliance with: ATEX Directive 2014/34/EU IECEx Scheme IEC 60079 standards (especially 60079-0 and 60079-11 for intrinsic safety) Provide guidance on protection methods (e.g., Intrinsic Safety – Ex i, Increased Safety – Ex e, etc.) Ensure proper implementation of: Creepage and clearance distances Energy limitation and fault tolerance Component selection and de...

Title: Pneumatic System Designer Required for Machine Manufacturing Company Description: We are OMM Enterprises, a growing company involved in machine manufacturing and sales. We are looking for an experienced Pneumatic System Designer who can help us design and plan efficient pneumatic systems for our machines. Scope of Work: Design complete pneumatic circuits and systems for industrial machines Provide detailed drawings and layouts Select appropriate components (valves, cylinders, compressors, fittings, etc.) Ensure cost-effective and efficient design Support in execution planning and implementation Troubleshoot and optimize existing pneumatic setups (if required) Requirements: Proven experience in pneumatic system design Knowledge of industrial automation and machine design Ability t...