电路设计 Jobs

Je souhaite concevoir puis réaliser un système d’irrigation intelligent, connecté en IoT, dédié aux cultures de céréales. L’objectif est de réguler l’apport en eau par irrigation de surface en fonction de données temps-réel recueillies par des capteurs d’humidité du sol et de température. Concrètement, il me faut : • l’architecture complète (choix du microcontrôleur – Arduino, ESP32 ou équivalent –, réseau LoRa/Wi-Fi, passerelle, cloud ou serveur local), • le schéma de câblage incluant électrovannes ou pompes pour l’irrigation de surface, • le code embarqué qui lit les capteur...

Hi I will share the details with the shortlisted candidates. Thanks

I need an experienced Fusion 360 user to correct errors in my electrical design. Requirements: - Fix both schematic and PCB layout issues - Resolve package issues, specifically incorrect footprints Ideal Skills and Experience: - Proficiency in Fusion 360 electrical design - Experience with schematics and PCB layouts - Strong knowledge of electrical components and footprints - Attention to detail and problem-solving skills

I have a circuit that now needs to move from the schematic stage to a production-ready printed circuit board. I will share the complete schematic, component list, and any mechanical constraints as soon as the project starts. Your task is to turn that information into a clean, manufacturable PCB layout and supply the standard fabrication files. Here is what I need from you: • Translate my schematic into a well-routed PCB that fits within the mechanical outline I provide. • Follow common DFM/DFT guidelines so the board can be produced by mainstream fabs without extra fees. • Deliver Gerber, drill, and pick-and-place files along with the source file from your preferred tool (Altium, KiCad, or Eagle are all fine). • Include a 3D step model so I can run a final fit c...

I already have three completed boards built around an ESP32, DS3231 RTC, EM18 RFID module, buzzers and indicator LEDs. The schematics and layouts are all in KiCad and functionally proven, but a handful of physical tweaks are still needed before I send them to fabrication again. What I need you to do in KiCad: • Reroute a few traces . * Reszie PCBs * Mark / update silkscreen text • Widen or narrow specific pads and drills so the joints wet better and hand-soldering is more reliable. • Shift certain through-hole parts and add a couple of extra mounting pads called out in my notes. • Adjust overall board outlines on two of the three PCBs so they seat perfectly in their enclosures. Turn-around is short; if you are comfortable in KiCad this should fit easily into a...

Hi I will share the details with the shortlisted candidates. Thanks

Ho 6 Raspberry CM4 che non si accendono e, dopo vari tentativi, sospetto un guasto hardware localizzato sulla scheda madre. Non vedo bruciature, crepe o altri segni evidenti, ma il dispositivo rimane completamente morto anche con alimentatore sicuramente funzionante. Cerco chi possa: eseguire la sostituzione dei componenti difettosi • verificare a banco che il Raspberry torni ad avviarsi e a collegarsi correttamente a rete e periferiche USB Preferisco una soluzione chiavi in mano: mi va bene spedire il dispositivo al laboratorio, purché sia testato prima della restituzione. Accetto anche una consulenza dettagliata se riesci a guidarmi passo-passo con gli strumenti giusti. Forniscimi tempi stimati, metodo di test finale e garanzia sul lavoro svolto.

I need a compact FR4 board that accepts a universal 85 – 265 VAC input and continuously supplies two regulated rails: 5 V DC and 12 V DC (each capable of up to 1 A). The 12 V line must terminate in generously sized through-hole pads so I can solder external wires with ease; the 5 V rail will power onboard logic. Lighting is handled by five SM1206-395-IL UV LEDs from Bivar. Three sit on the main board, while the other two reside on small right-angle daughter PCBs soldered perpendicular to the base board. This is for an industrial environment, so please favour robust component choices, but I do not require formal UL or CE certification. Every part should be readily sourced from major Indian distributors such as Mouser India, Element14 India, or local vendors like Robu and MD Componen...

Briefing do Projeto Estamos procurando um profissional para desenvolver um projeto de um Sistema Ecológico de Reaproveitamento de Água para Hortas Domésticas. O projeto é um protótipo simples, desenvolvido para uma pequena horta doméstica, sem necessidade de atender grandes áreas ou implementar funcionalidades complexas. Objetivo Desenvolver um sistema automatizado utilizando ESP32 que monitore a umidade do solo e realize a irrigação utilizando água da chuva armazenada em um reservatório, promovendo economia de água e praticidade para o usuário. Funcionalidades esperadas - Programação completa do ESP32; - Leitura do sensor de umidade do solo; - Leitura do sensor de nível de...

Project Title Design a Logic Gate Based Non-Programmable Sensor-Actuator PCB — Prototype Development Project Overview I need a custom electronics board designed and prototyped around a combination of Logic Gates, built for a non-programmable, hardware-only sensor-to-actuator decision system (no microcontroller/firmware involved). The board should be robust, classroom/hobbyist-safe, and ready for small-batch prototyping. Concept The core idea is a hardware logic control board where inputs (sensors which uses only digital signal like IR sensor, PIR sensor, LDR sensor etc.) and outputs (actuators/dc motors, LED and buzzer) are combined using any gate logic — with no coding or programming required. Detailed Requirements 1. Power Requirements Power input via a 9V battery....

Requirement: Electronics Hardware Design Consultant (Industrial Instrumentation) We are looking for an experienced Electronics Hardware Design Consultant to support our D&D department in developing and upgrading industrial instrumentation products such as Ultrasonic Level Transmitters, Radar Level Transmitters, Capacitive Transmitters, and various Level Switches. Scope of Work: Electronic circuit design and calculations Analog and digital hardware development 4-20 mA and HART communication circuits Power supply and protection circuit design EMC/EMI-compliant hardware design Schematic and PCB design reviews Design optimization for reliability and manufacturability Support for IEC 61000 and EMC certification requirements Upgrading existing products with advanced features and improved pe...

I run an analog broadcasting facility and need an experienced radio engineer to work directly on our transmitter and tower-mounted antenna system. Your focus will be the RF chain—from the exciter right through to the radiating elements—making sure we’re operating at peak efficiency and fully within our licensed technical limits. You’ll have access to current schematics, field strength and SWR readings, plus any service manuals we hold. Using your own measurement gear (spectrum analyser, dummy load, vector VSWR meter, etc.) or equivalent tools on-site, I’d like you to: • Diagnose and resolve any signal quality or coverage issues linked to the transmitter or antenna • Retune, align and verify power output and reflected power figures • Docu...

I have a multi-lane PCIe board laid out in KiCad and I want a sharp set of eyes on its signal integrity before we order production units. The schematic and layout are finished, so the assignment is strictly a design review with testing; no new routing or simulation work is required. The focus is signal integrity. I’m particularly worried about EMI, crosstalk between adjacent differential pairs, and any impedance-matching missteps that could cause reflections or eye-diagram collapse. You’ll examine trace geometry, reference plane continuity, via transitions, connector breakouts and length matching, then validate your findings. Deliverables • An annotated copy of the KiCad project highlighting every issue found and recommended fixes. • A concise test report (sco...

I need a qualified technician to carry out routine maintenance on my Split AC. The job covers a full cleaning of both the indoor and outdoor units, including filters, coils, drainage line, and fan blades, followed by a quick performance check to be sure the system cools evenly and operates quietly. Deliverables: • Thorough cleaning of indoor unit • Thorough cleaning of outdoor compressor unit • Inspection of refrigerant pressure, electrical connections, and thermostat calibration • Brief report on any parts that may soon require replacement I’ll make the area around the units accessible; you only need to bring the necessary tools, cleaning agents, and a portable vacuum. Please let me know your availability and how long the service usually takes so we c...

1 Project overview We are developing a medical neurostimulation device intended for therapeutic applications, including tinnitus treatment. The system consists of: • A central unit based on a Toradex Verdin 8M Mini SOM • Up to five body-mounted emitters • Custom electronics responsible for signal generation, power control, safety monitoring and communication with the Toradex platform The project is already well defined at system level, and hardware development can start immediately. ________________________________________ 2 Scope of Work Design a custom electronics board capable of controlling up to five emitters simultaneously. Each emitter includes: 2.1 Inductive Channel • Resonant coil • Approximately 35 kHz sinusoidal carrier • Current-controlled operat...

I have a compact 433 MHz transmitter built around a CMT2219B RF module driven by a GD32E230G8 MCU. Before we invest in the formal lab work, I want an experienced RF-compliance engineer to look over the current schematic and two-layer PCB layout to maximise our chances of passing both FCC Part 15 and the equivalent ISED requirements. The focus is squarely on RF performance. I have no existing test data, so I’m relying on your insight to flag anything that might push us over the limits once we reach conducted or radiated emissions testing. Key areas include the matching network around the module, antenna feed, ground strategy, return-loss considerations, filtering, and any layout tweaks that could shave a few dB off leakage. You’ll receive the design files (Gerber, pick-and-pla...

I need a clean, production-ready schematic built in EasyEDA for a multi-layer board that will ultimately be fabricated as a 2-layer PCB. You will start from my rough block diagram and turn it into a fully annotated circuit, complete with correctly assigned nets and footprints chosen from the EasyEDA parts library (or custom symbols if a part is missing). The finished file should open without errors in EasyEDA’s online editor, pass Electrical Rule Check, and be ready for me to push straight into PCB layout. Please name every reference designator logically, keep signal groupings tidy, and observe standard 2-layer design conventions such as clear ground and power planes that will translate well once I route traces. Deliverables: • EasyEDA schematic file (JSON) • PDF printo...

I’m developing a compact 1 × 1 inch board dedicated to sensor integration and need an experienced electronic designer to turn my concept into production-ready files. The job involves creating the full schematic, laying out the multilayer PCB, and preparing all manufacturing outputs while keeping signal integrity and power routing clean within the tight footprint. Because this board’s sole purpose is to host sensors, component placement and trace routing must anticipate minimal noise coupling and allow straightforward connector access on at least one edge. You are free to choose the CAD package you’re most efficient with—KiCad, Altium Designer, Eagle, or similar—as long as the final deliverables meet standard fabrication requirements. Deliverables I exp...

A full residential re-wire is underway and every circuit—from the main service panel right through to the last light switch—needs to be designed, installed, and tested. I want the entire scope covered: panel placement and sizing, branch-circuit layout, conduit and cable runs, outlet positioning, lighting fixture rough-in, and final device terminations. All work must comply with the latest NEC requirements and local codes, including proper AFCI/GFCI protection, load calculations, grounding, and bonding. If you regularly use tools such as AutoCAD (or similar) for schematics and can document each circuit with clear schedules, that is a plus. Deliverables I need to sign off on: • A complete single-line and layout drawing of the home’s electrical system. • ...

Estoy desarrollando un prototipo IoT de bajo consumo para un vertedor inteligente de bebidas y busco un ingeniero embedded/freelance con experiencia práctica en Nordic Semiconductor nRF52 y Bluetooth Low Energy. El objetivo del prototipo es detectar cada servido de una botella mediante un reed switch activado por un imán colocado en la tapita abatible del vertedor. Cada vez que el reed switch se active, el microcontrolador debe enviar automáticamente un evento BLE con un ID único del vertedor hacia un dongle nRF52840 PCA10059 conectado a una computadora, que funcionará como hub/receptor. No busco una empresa grande ni una solución sobredimensionada. Busco un especialista técnico que pueda llevar el prototipo a una prueba funcional, documen...

Diseño de señales mixtas​Descripción del Proyecto: ​Busco un ingeniero electrónico con experiencia en diseño de potencia y control para convertir un esquema funcional y especificaciones técnicas detalladas en archivos Gerber listos para fabricación industrial. ​Detalles técnicos: ​Estado: Poseo el esquema técnico completo, la lista de materiales (BOM) y el código fuente para Arduino Nano. ​Alcance: Necesito que el profesional realice el diseño del PCB considerando los siguientes puntos críticos: ​Seguridad: Corriente de carga de ~33-35A que NO debe pasar por las pistas de la PCB (uso de relés con terminales Faston externos para la potencia). ​Control: Implementación de optoacopladores ...

I need an experienced hardware designer to turn my concept for a six-port, gigabit-speed Ethernet switch into a complete, production-ready design. 3 of 6 channel must deliver up to 70 W of IEEE-compliant PoE, other 3 must deliver up to 20 W and, instead of the usual RJ45 jacks, I want every data-plus-power line brought out on JST-GH connectors. Mechanical requirements • Board must be as smaller as possible with 4 holes M3 at the corners. Electrical highlights • True gigabit switching performance across all six ports, with robust QoS and VLAN support. • 70 W continuous PoE available on 3 of 6 ports, other 3 ports 20 W. • 50V output voltage for POE • Input-voltage capability: 10-26V • Protection for reverse polarity, surge, and hot-swap events is essen...

I’m finalising the construction documents for a large single-family home that will exceed 4,000 sq ft, and I now need a complete set of coordinated electrical and plumbing layouts for the entire property. The architectural floor plans are ready in DWG and PDF, so you’ll be able to reference exact wall locations, fixture positions, and ceiling heights. What I’m looking for is a clear, code-compliant design that the building team can follow without guesswork. That includes panel schedules, circuit runs, switch and outlet placement, lighting layouts, fixture specifications, pipe sizing, routing, venting, and hot-cold-waste schematics. Because this is whole-house new construction, the drawings must dovetail smoothly with HVAC and structural plans already in progress. I ...

I'm looking for an experienced hardware developer to assist with my Solar MPPT project, which is currently in development. The specific areas where I need help are: - PCB Layout - Circuit Design - Component Selection Ideal skills and experience: - Strong background in power electronics and solar energy systems - Proficiency in PCB design software - Experience with circuit design and component selection - Ability to work collaboratively and provide detailed documentation Please provide examples of similar projects completed.

I have a working shortlist of LTE and power-supply components and now need a specialist to bring them together on the hardware side. The goal is a compact, battery-powered board that boots the chosen LTE module reliably, meets the module’s peak-current demands, and stays within the battery’s safe-discharge limits. What I already have • Datasheets and purchase links for the selected LTE modem, SIM socket, PMIC, Li-ion cell, and protection circuitry. • Preliminary schematic drawn in KiCad. What I need from you • Review and refine the schematic and PCB layout to eliminate power-rail dips, EMI issues, or antenna detuning caused by poor grounding. • Specify or validate in-line components—inductors, caps, TVS, fuses—so the battery section passes ...

I’m looking for someone to build a low-cost prototype external sensor unit for my GrowlerZ iOvilus project. The idea is a small Bluetooth sensor hub that connects to an Android phone/app and sends live readings from external sensors. Prototype requirements: ESP32-C3 or similar low-cost Bluetooth/USB-C microcontroller External EMF/magnetometer sensor Ambient temperature sensor Humidity sensor Barometric pressure sensor Light/lux sensor Battery powered if possible, or USB powered for first prototype Simple 3D-printed or off-the-shelf enclosure Live sensor readings sent over Bluetooth BLE Basic documentation so my app developer can connect it to a Flutter Android app This does not need to be a finished commercial product yet. I’m looking for a working proof-of-concept prototype fi...

I need a compact RC timing network that drives a MOSFET to short-out an NTC after start-up so the circuit acts as an inrush-current limiter only for the first few hundred milliseconds. The system runs from a 110 V DC bus and the load can draw up to 10 A once the bypass closes. Your task is to select suitable parts, calculate the RC values that give a clean, repeatable hand-over, and show how the MOSFET gate is protected against the high dV/dt on the bus. I’d like the work delivered as: • Schematic (PDF or KiCad). • Brief calculation sheet or annotated simulation showing how you arrived at the delay and confirming the inrush profile. • Short parts list with readily available components. I can validate the design on my bench, so please keep the explanation con...

Estou montando um sistema residencial que necessita de alimentação trifásica estável para pequenos motores e cargas eletrônicas. Procuro um especialista em eletrônica de potência que desenvolva um circuito capaz de gerar tensão e corrente trifásicas a partir de uma fonte monofásica ou de um barramento DC. O que preciso receber: • Orientações de montagem, ajustes de fase/balanceamento e recomendações de dissipação térmica. • Esquemático eletrônico completo no EasyEDA. • (Opcional, se utilizado) Firmware ou parâmetros de controle para qualquer microcontrolador. • O hardware, deve permitir o controle da tensão e corrente, ajust...

I need two simple yet reliable prototype nodes that can sit outdoors, wake up at a configurable interval, pull a register line from a Modbus-compatible soil probe, and push that reading through a Meshtastic link. No commercial polish required—the goal is to prove the data path end-to-end. Scope of work • Recommend and source—or at least specify—a compact board, radio module, and battery pack (AA-powered) suited for outdoor use. I currently have no hardware on hand, so component guidance is essential. • Write Python-based firmware (preferred language) that: – Powers the Modbus interface, retrieves the probe value, and sleeps between cycles to conserve the batteries. – Publishes the reading over Meshtastic in a lightweight JSON or CSV payl...

Project Title: Solar Inverter Description: I am looking for an experienced freelancer to design and develop a solar inverter with a power output of 1-5kW. The primary use of the solar inverter will be for residential purposes. Key Requirements: - Power Output: The solar inverter should have a power output capacity ranging from 1-5kW, ensuring efficient energy conversion for residential solar installations. - Residential Use: The solar inverter should be designed to cater specifically to residential properties, ensuring compatibility and optimal performance for home solar systems. - WiFi Monitoring: The solar inverter should include WiFi monitoring functionality, allowing homeowners to remotely monitor their solar energy production and consumption through a user-friendly interface. Id...

I’m building a compact, battery-powered tattoo machine and need a custom rectangular PCB that can both manage the lithium-ion power source and drive the rotary motor smoothly. Core requirements • Power management: on-board charging, cell protection, and a stable step-up/step-down stage to keep the motor supplied as battery voltage drops. • Motor control: for controlling brushed dc motor. To adjust voltage supplied to the motor in 0.1v increments Form factor The board must remain rectangular and no larger than roughly 35 mm on its shortest edge so it can slide into the existing machine housing without modifications. Deliverables • Complete schematic in KiCad, Altium, or Eagle • Optimised PCB layout (Gerber, drill, pick-and-place files) • Bill of...

I’m looking for a freelancer in Delhi NCR who can help design and build a small working prototype of a flexible solar panel curtain or Venetian blind system for a school project. The idea is to integrate flexible solar panels into a curtain/blind structure so it can collect sunlight during the day and power a small LED or similar low-voltage output. I need help with both the concept and the physical prototype. What I need help with: - Prototype concept and layout. - Basic circuit planning. - Material selection. - Physical assembly of a small model. - Simple working demonstration of solar charging and output. Preferred skills: - Solar panel integration. - Low-voltage electronics. - Product prototyping. - Arduino or simple circuit experience. - Mechanical/fabrication skill...

I’m developing a new consumer-electronics device and I need a reliable double-layer PCB designed from the ground up. I will supply the schematic on paper. The project involves ESP32, SMPS designing and other common components .

I’m ready to move an industrial-grade controller board from 50K units to 500K Units production and need a China-based ODM and PCBA house that can step in, refine the current design, and run the line at scale. The board already works in the field, yet a few component swaps and layout tweaks are required for smoother manufacturability and lower cost. Once those engineering changes are locked, I want to transition straight into volume builds without handing the project off to yet another shop, so I’m looking for a single partner that covers everything from engineering updates through surface-mount, wave solder, functional test, and final pack-out. What matters most to me is seamless communication, transparency on component sourcing, and proven experience with industrial-equi...

I’m building a small toy that plays a single prerecorded sound. To make this work I need a PCB design built around the OTP voice chip, a LiPo battery with its recharge module, and an on-board micro speaker. A simple momentary push-button should trigger playback; no other activation modes are required. Space is at a premium: the entire populated board, battery, and speaker footprint must fit comfortably within roughly 3 cm × 3 cm x 4 cm. Deliverables • List of components • Connection intructions Please choose components easy to be found in the web, cheap and use as few as possible.

请注册或者登录后来查看详情。

ESP32 CNC Display Unit — PCB Schematic, Layout, BOM & Aluminium Enclosure Design (Industrial IP54) Designing a Smart CNC Machine Display Unit for industrial shop-floor use and need an experienced electronics + mechanical freelancer to deliver production-ready design files. SCOPE OF WORK: - Schematic design for PCBs (Main Control Board + LED Display Board) - PCB layout (KiCad preferred) - BOM with Indian supplier part numbers and alternates - Aluminium enclosure design (CNC machined or sheet metal) — IP54 rated - Smoked black acrylic display window - Magnetic + screw mounting - All source files + manufacturing-ready outputs (Gerber, STEP, DXF, PDF) TECHNOLOGY: - MCU: ESP32-WROOM-32D - Display: 8× MAX7219 cascaded 8×8 colour LED dot matrix - RTC: DS3231 | ...

The schematic is locked down, the netlist is clean, and a complete BOM is already in place—I simply need the board itself routed inside Fusion 360 Electronics. The board is on the large side (greater than 10 cm × 10 cm) and is intended for prototype testing, so the layout must be manufacturable yet flexible enough for possible tweaks after first spin. You’ll receive my Fusion project containing the schematic, Net List, and BOM. From you I need: • A fully routed PCB file in the same Fusion 360 project, adhering to standard DRC rules. • Updated design rule set if you adjust trace/clearance values. • Output files ready for fabrication (Gerber, drill, pick-and-place, and IPC-356). Acceptance is straightforward: the design must pass Fusion’s D...