Diseño de circuitos Jobs

Description I need one physical prototype assembled from a complete, tested design. This is a hands-on build — soldering, basic fabric mounting, and loading provided code — with no design work. Everything you need is written down: a parts list (~$80), a wiring diagram, a belt layout drawing, the two microcontroller programs, and a three-step verification procedure. What you'll build A wearable elastic belt carrying six small 3V coin vibration motors, each glued into a small rigid pod and Velcro-mounted so it can be repositioned. The motors are driven by a BBC micro:bit v2 through a ULN2003 driver chip, powered by a 3×AA pack, housed in a small pouch or box on the belt. A second micro:bit v2 serves as a handheld controller and talks to the belt over the micro:bit&#...

I am integrating a 50-pin FPC connector taken from a mobile phone into a brand-new product, but I have absolutely no documentation on it. Your task is to uncover every signal on that ribbon—power rails, data lines, control pins, grounds—so I can design a compatible mating board without risking damage to either side. Here is what I can supply once we start: • Clear macro photos of both sides of the flex and its mating board • A working handset for continuity checks or live probing if needed • physical pcb can be couriour within india What I need back from you: • A complete pin-by-pin table listing signal names, functions, and voltage levels where applicable • A brief description of the testing or reverse-engineering method you used (tracing, conti...

We are looking for an experienced freelance Embedded Hardware + PCB + Firmware Engineer for an IoT/industrial electronics project. Location: Kolkata preferred Required hands-on experience: • STM32 Nucleo / Discovery boards • Embedded C/C++ and STM32 firmware • UART / USART / RS485 / Modbus RTU • USB-to-RS485 & UART-to-RS485 • GSM / 4G / LTE modules and AT commands • PCB schematic & layout – KiCad / Altium / Eagle / EasyEDA • Component selection & BOM preparation • Power supply and protection circuits • Logic analyzer / oscilloscope / multimeter • PCB bring-up, debugging and hardware testing • Sensor and industrial interface integration • ADC / 4–20mA / 0–2V interfaces Good to have: ESP32, MQTT, Lo...

Electrical discrimination study completed using trimble software or similar proving discrimination between all circuit breakers I can provide cable lengths etc uk standard I can also provide base trimble pro design model

My collection of personal vapour devices has gradually stopped performing: the LED still lights up, yet no vapour is produced. I have already swapped in fresh batteries, brand-new coils/atomizers, and even replacement circuit boards, so the usual quick fixes are exhausted. I need an electronics-savvy troubleshooter who understands vape mods, pens, and similar hardware to fix these. I have about seventeen of these. They're first generation, three-part, meaning the atomizer is separate from the battery section. I've replaced the batteries, and the circuit boards. The batteries are working, as the LED is lighting when "drawn" on, but they're producing no vapour. I want to save these because I can't find them anymore, and it's the only kind I can use. I ...

Preciso que o layout de uma placa compacta – menos de 10 × 10 cm – seja roteado priorizando três blocos críticos: memória DDR2 de alta velocidade, rádio 2,4 GHz e 5 GHz, e toda a malha de alimentação associada. O empilhamento terá mais de quatro camadas, portanto conto com o controle rigoroso de impedância, pareamento de trilhas diferenciais e blindagem adequada entre sinais ruidosos e as antenas. Já possuo o esquema elétrico e pcb com os componentes posicionados e formato da placa definido em formato kicad. Faltando apenas conferencias e roteamento. 1) Trocar alguns passivos de 0402 para 0201 -> Tem alguns capacitores de RF que nao precisam ser 0402 2) Posicionar os componentes passivos de RF 3) Faze...

PADS PCB Design for high speed 16 layer board. Repy only if you have the PADS software and experince of high speed circuits

I need a compact laser-based perimeter protection system for a commercial site that immediately calls a predefined phone number whenever the beam is interrupted. The solution must combine reliable laser detection hardware with a GSM module (SIM800, SIM900 or similar) and the embedded code to place that outbound call within seconds of a breach. The finished unit should be self-contained, run from standard low-voltage DC, and include clear wiring diagrams and firmware source so I can duplicate or service it later. If you can integrate basic tamper detection, weather-proof housings, or an optional battery backup, mention that in your proposal—those extras would be a plus but are not mandatory. To accept the work I will power up the prototype on-site, break the beam and confirm that my...

We are looking for an experienced PCB designer to help with PCB schematic design, PCB layout, component selection, routing, and preparation of manufacturing-ready files.

I already have a fully-verified KiCad schematic for a small industrial power supply and now need the actual board laid out. The goal is to squeeze the design into the smallest practical footprint without compromising functionality, so every millimetre saved counts. All parts must sit on the top layer only; the underside has to stay completely flat for mechanical clearance and easy heat sinking against a metal chassis. Because of that mechanical requirement, I want to stick with standard through-hole vias rather than blind, buried, or micro solutions. Here’s what I would like you to handle: • Precise component placement that respects the single-sided assembly constraint. • Clean, compact routing that keeps the overall dimensions as tight as possible while meeting manufac...

I need a complete set of KiCad schematics drawn from scratch for a fairly large, multi-board concept. The job is limited to the schematic stage—no PCB layout—yet the design is dense, with a high component count, multiple power rails, and several digital-analog interfaces that must be kept well organised through hierarchical sheets. I will supply a first batch of parts: CPUs, power converters, key connectors and a few specialised ICs, each with its electrical characteristics and a preferred footprint. The remaining devices—discrete passives, protection components, odds-and-ends ICs—still need library symbols created or matched to existing KiCad libraries, along with suitable footprints. Whenever information is missing, I will point you to the relevant datasheets; yo...

Need only location jaipur. I need a solid, production-ready LED PCB layout that will sit at the heart of a new general-lighting product. The immediate priority is the board itself: component placement, thermal management, trace sizing for consistent current delivery, and a stack-up that keeps costs sensible while still passing UL/CE safety checks. The board will eventually mount to a rotating assembly driven through a pancake slip ring and have supporting driver hardware, but those elements can stay in the background for now—design choices simply need to leave space for a 40 mm centre hole and provide clean, low-noise power contacts for the slip ring interface later on. What I will supply: • LED model and photometric targets • Mechanical outline with the slip-ring cut-...

I’m building a compact entertainment gadget dedicated to high-quality audio playback and I need a complete PCB designed from scratch. The board must meet all the usual consumer-electronics constraints—low noise, minimal power draw, reliable mass-production tolerances—and fit inside a small enclosure that I will share once we start. Here’s what I expect from you: • Schematic capture based on my block diagram and component preferences • Optimised multilayer board layout with proper ground-plane management for clean audio paths • Gerber, drill and pick-and-place files ready for fabrication • A clearly organised BOM with current, purchasable parts and viable alternates • Brief design notes explaining critical decisions (impedance contro...

hello, as part of our development process, we are experimenting with pcb design by Ai in kicad (mainly kimi k3 and konnect mcp). We can test ideas quickly but then design are less than optimal (to say the least) So, we would like to hire a person that is willing to review and fix the project to make it really fabrication ready. We would like to hire by the hour as we cannot know upfront what the effort is going to be for any given pcb, sometimes the project is not bad, sometimes it's terrible. So, if you are not familiar with freelancer. Com desktop app to track the hours, Pleaee do not bid. This is an ongoing project as we have several projects like this. Pleaee mention your experience and portfolio should back it up.

I am looking for an experienced PCB Design / Hardware Engineer to complete the PCB Layout and Routing from scratch for a custom, high-density drone flight controller board (AMADEO H743). I already have the complete schematic capture and verified footprints / component libraries ready. The goal of this project is to take the schematic and design a clean, reliable, multi-layer PCB layout ready for fabrication and assembly. Board Specifications & Layout Challenges: Main Controller: STM32H743VIT6. Power Management: Wide-range power delivery from 3S–8S LiPo batteries (~11V to 34V input). Incorporates high-efficiency switching buck regulators (5V/10V rails) and low-noise LDOs (3.3V) for sensors. Sensors & Peripherals: Low-noise IMU (ICM-42688-P), BMP390 barometer, A...

I am moving a hardware project from concept to production and need a KiCad specialist to work alongside me through schematic capture, PCB layout design, and library management. The current schematic is still in its initial draft, but I have already documented every functional block, net constraint, and mechanical boundary in a detailed requirements PDF that I will share as soon as we start. Your first task will be to review and clean up the draft schematic, verifying component choices and flagging any electrical or footprint conflicts. From there we will: • Finalise the component libraries, adding any missing symbols or footprints so the project remains self-contained and version-controlled. • Complete the PCB layout to match my stack-up, keep-out zones, and routing guideline...

I have a hand-drawn circuit diagram that now needs the full KiCad treatment: a clean, conventional schematic, properly assigned footprints, a 3D board render, and final Gerber files ready for fabrication. The project is for my own personal use, so I’m happy to discuss component selection rather than lock you into any specific brands. Your background with KiCad should be evident in your reply—show me similar conversions or other boards you have taken from paper (or napkin!) through to production. Deliverables • KiCad schematic matching my sketch • Neatly laid-out PCB with footprints and design rules observed • 3D board view exported as STEP or screenshots • Verified Gerber set (RS-274X) and drill files I’ll supply the scanned sketch and...

I’m putting together a small-run prototype board focused on digital signal processing that also needs onboard wireless connectivity. The goal right now is to capture a clean, production-ready schematic that I can pass straight into layout once the parts are locked in. Here’s what you’ll be working with: • 100 % digital component set—no analog front ends this time. • Core functions revolve around real-time signal manipulation plus low-power wireless links (think BLE, Wi-Fi or similar; I’m open to whichever stack fits best). • It’s strictly a development board, so easy probing, test headers and clear silkscreen labels are important. What I need from you: 1. Complete schematic in KiCad, Altium, Eagle or another well-known CAD tool. 2....

My circuit is already captured as a clear schematic diagram; it contains just four to five surface-mount parts that form a simple signal-processing stage. All I need now is a production-ready, single-sided PCB layout turned around quickly. Key points you should know: • Single copper layer only – no vias to the reverse side. • Components are 100 % SMD; please place them so hand-soldering remains possible. • Board function is signal processing, so keep any sensitive nets short and well-routed. Deliverables I expect: • Complete Gerber / drill set ready for fabrication • Source layout file in your chosen tool (KiCad, Altium, Easy-EDA, etc.) • Simple placement PDF so I can check part orientation If you can start right away and hand back a cle...

Engineer must be based in England and be able to travel (Lincolnshire area) I need a complete wiring schematic for an existing electrical control panel that currently runs without any formal documentation. You will be reverse-engineering what is already in the cabinet and turning it into a clear, professional drawing set. What I can provide • Physical access to the panel during agreed site hours • High-resolution photos of every section and component • Verbal or written notes describing functions, wire tags, and any observations I have made Scope of work You will trace every circuit, identify all devices and connections, and produce a legible schematic in a standard CAD format—AutoCAD Electrical, EPLAN, or similar—along with a simple bill of materials. ...

This project involves updates to signal processing, and possible EMI compliance updates on an existing board. The PCB has already passed Part 15 emissions, but there is reason to think it may not pass CE. The successful candidate will possess, at minimum, a BSEE and extensive experience with Altium. The specifics are adding a dual analog switch to low noise signals for a musical instrument. Some existing components may need to be moved. We are specifying US based freelancers only.

Project Overview: Design and prototype a 446 MHz wireless audio broadcast system for indoor mosque sound in India (using the license-free PMR446 band). 1. Mosque Transmitter Unit: - Audio line-in from Mosque PA amplifier (Ahuja). - MAX9814 AGC leveler/compressor to prevent voice clipping or distortion. - Auto-VOX sound trigger to start transmitting automatically when the Muazzin speaks (zero manual buttons). - SA818S-U UHF module (1W Tx mode) tuned to 446.0562 MHz with 67.0 Hz CTCSS tone. - 50-ohm SMA connector connecting to outdoor Diamond X-50 minaret antenna via 15m RG-213 cable. - 5V DC power supply with surge protection. 2. Home Receiver Speaker Box: - SA818S-U module (Rx mode) tuned to the same 446.0562 MHz + 67.0 Hz CTCSS code. - Hardware squelch/mute control: MUST be 100% dead si...

We are looking for a skilled and reliable KiCad developer/user for a potential long-term partnership. At the beginning, you will work in a trial/test period. We will give you a small KiCad task to evaluate your skills, work quality, communication, and reliability. Trial task: Use our Rounder for Tracks v3.2 KiCad plugin. Test it on a PCB with angled tracks. Check whether the tracks are rounded correctly. Try different plugin settings. Send screenshots after testing. Provide clear feedback about the results and any issues you find. If we are satisfied with your work, we will hire you for a long-term partnership and provide you with more KiCad-related tasks and projects on an ongoing basis. We are looking for someone who is interested in long-term cooperation, not just a one-time projec...

PROJECT TITLE: WEAR IT V1 – Compact Wearable PCB & Schematic Design PROJECT OVERVIEW: We are developing WEAR IT, a compact screen-free wearable health and fitness band. The functional proof-of-concept (POC) is already working. We now need an experienced PCB and electronics engineer to convert the existing engineering architecture into a professional, manufacturing-ready custom PCB. This is NOT a concept-stage project. The electronics architecture and major components have already been selected. The engineer's responsibility is to create the professional schematic, PCB layout, routing, libraries, verification and complete manufacturing documentation. MECHANICAL TARGET: Maximum PCB size: 33.5 mm × 23.0 mm Maximum complete wearable device envelope: 34.7 mm × 24...

Experienced KiCad Hardware Engineer – Schematic Capture, DFM-Optimized PCB Layout & Production Package (Turnkey JLCPCB Assembly) Job Description: Honeycomb LLP is seeking an experienced embedded hardware and PCB design engineer to take a product design from initial block diagram/specifications through complete schematic capture, PCB layout, and turnkey assembly package delivery. The board will host an embedded microcontroller ecosystem (e.g., ESP32 / RP2040 / STM32) interfacing with sensors and power management circuits. The final design must be fully optimized for cost-effective manufacturing and assembly via JLCPCB SMT services. Scope of Work & Responsibilities: 1) Schematic Capture: Design modular, production-ready schematics in KiCad (latest stable version) adhering...

TI-84 PLUS + ESP32-S3 + OV5640 AI CALCULATOR BUILDER SPECIFICATION 1. PROJECT OVERVIEW Build a modified TI-84 Plus non-CE calculator with an internally installed Seeed Studio XIAO ESP32-S3 Sense, OV5640 5MP autofocus camera, Wi-Fi, OpenAI API connectivity, TI-84 to ESP32 communication, and a calculator-side AI interface. System architecture: OV5640 camera -> ESP32-S3 -> Wi-Fi -> OpenAI API -> ESP32-S3 -> TI-84 -> Display The ESP32-S3 handles camera control, image processing, networking, and AI communication. The TI-84 provides the keyboard, display, user interface, and commands. Use the existing TI84-AI GitHub project by ivan-grebe as the primary software and architecture reference: Do not simply adapt an ESP32-C3 tutorial. This build specifically uses an ESP32-...

1) Need to do total re routing 2) need to add esp32 c6 wroom 1 vis uart,spi and i2c 3) add eeprom 4) correct modbus error 5) re naming all I/O

I’m upgrading our facility’s power resilience and need a licensed electrician who has hands-on experience installing rack-mounted UPS units in a commercial environment. The job involves receiving the new rack UPS on site, mounting it securely in the existing server rack, tying it into the dedicated 208 V circuit already pulled to the data room, verifying grounding, and performing a full load test with our IT team before hand-over. You should be comfortable working around running equipment, Please bring the tools required for safe lift-in. Deliverables expected: • Fully installed rack UPS, cabled and labeled • Commissioning report showing voltage, amperage, battery diagnostics, and 30-minute load test results • The existing Commando plug will be removed...

Need small anf compact HDI multilayer pcb from systematic to pcba which can be connected with my existing smartphone pcb . Requirement in custom pcb are - 1) NFC + custom NFC antena 2) Secure element 3) secure MCU 4) type C USB for data 5) vibrator 6) touch buttons 7) pogo pins for charging BOM and all details of my main pcb will be discussed and provided to you

I already have a complete schematic and BOM for an embedded-system board and now need someone to turn it into a production-ready PCB in KiCad. You will receive the schematic, component list, and the exact board outline with mounting-hole locations so the size constraint is fixed from the start. Your task is to place all parts logically for signal integrity and serviceability, route power and ground planes cleanly, add connectors exactly where the enclosure dictates, and run full DRC to be certain the board will pass fabrication checks the first time. Please keep an eye on trace widths, clearances, and manufacturability rules that mainstream fabs expect. When finished, send me: • The complete KiCad project (schematic symbols, footprints, and PCB layout) • Gerber and drill fil...

Our company needs the Electrical - Mechanical Engineer!!! >>>To show that you have carefully reviewed this job posting, please check my location (country) and state—at the very beginning of your proposal—the time calculated by subtracting one hour from my local time.>>> (Job Title) Electrical - mechanical Engineer for Medium-Voltage Line Sensor Prototype (Job Description) Important availability and engagement requirements: This is a fixed-price project only - no hourly billing and no upfront payment. Payment will be tied to agreed project milestones/deliverables. We need someone who can commit approximately 60 hours per week, work primarily in the US Pacific Time (PST/PDT) zone, and be available for real-time communication throughout the working day. We a...

I will give you a complete distortion/overdrive guitar-pedal schematic along with a list of the exact parts I want to use. Your job is to recreate that digital circuit in EasyEDA, make sure every symbol and footprint matches the components I provide, and lay out a compact, noise-conscious PCB that can go straight to fabrication. Because this is a digital circuit for an audio pedal, trace placement, ground routing, and jack positioning matter; please keep signal integrity and pedalboard ergonomics in mind while arranging the board. I’m happy with through-hole as long as the parts remain the same ones on my list. Deliverables • EasyEDA project file with the full schematic entered • Optimised PCB layout inside the same project • Generated Gerber/NC drill set ready f...