Diseño de circuitos Jobs

I need a custom-designed PCB for home automation applications, built around the ESP32 DevKit V1. The PCB will control: - AC loads via Omron G5LE SPDT relays, optocouplers, and BJT drivers. - AC dimming (lamp/fan) using MOC3020 opto-driver + BTA16 TRIAC. - DC loads (like RGB LED strips) using IRF540N MOSFETs. Key features: - Integrated AC-DC power supply with bridge rectifier, dual 7805 regulators, and ESP32 3.3V regulator. - Optical isolation between ESP32 logic and high-voltage circuits. - External KF301 series connectors for AC input, AC load output, and 12V RGB outputs. - Status LEDs for debugging and system monitoring. Requirements: - Compact and small form factor - Standard KF301 series connectors - Improvement related safety - Songle high Power 30a relay replacement - 240ac to ...

I'm seeking an expert to prototype the electric chassis wiring for an electric trolley designed to transport tools. Key requirements include: - Design and implement wiring for electric chassis - Ensure safety and reliability Ideal skills and experience: - Electrical engineering background - Experience with electric vehicle wiring - Strong problem-solving skills Please provide relevant experience in your bids.

I want to build a persistence-of-vision LED system that mounts on a standard bicycle wheel and shows crisp, full-color static images whenever the wheel reaches riding speed. The image should appear only at higher RPMs—cruising or sprint speeds—not while I am moving slowly or stopped. Core functionality • An addressable 256 LED spoke mounted strip driven by a small micro-controller (ESP32, Arduino-compatible, or similar) and powered by a lightweight, wheel-mounted battery. • Firmware that stores and renders static bitmaps in correct perspective as the wheel spins, synchronizing via hall-effect or magnet sensor. • A simple phone app that lets the rider pick any image, crop it to a wheel-friendly template, and wirelessly push it to the controller. There is no...

I need a custom power supply designed specifically for consumer electronics, with a focus on automation systems. The power supply must output 12V. Key requirements: - Suitable for consumer electronics and automation systems. - 12V output voltage. Ideal skills and experience: - Expertise in power supply design. - Experience with consumer electronics and automation systems. - Knowledge of safety standards and regulations. Please provide your portfolio and relevant experience.

I need a compact, production-ready PCB designed for a new consumer-grade smart-home device. The board’s core task is to handle a dedicated control-interface switch that will let users toggle the appliance on and off and cycle through a few operating modes. Space is not tight, so component selection and trace routing will be no problem. You’re free to work in Altium Designer, KiCad, or Eagle—whichever lets you move fastest while still delivering neat, well-documented files. If you choose RF-friendly parts, please keep the layout compatible PCB Easy or JLCPCB. Deliverables I expect: • Schematic and PCB layout files • Gerber, drill, and pick-and-place outputs ready for fabrication • A tidy BOM with supplier part numbers and current pricing • Assem...

Job Title: Electrical Design for Residential + Commercial Building (Indoor, Outdoor, DG Backup, Fire Pump & Lift) Project Description I am looking for an experienced Electrical Design Engineer to prepare a complete electrical design package for a Residential + Commercial building project. The design must include indoor and outdoor electrical systems, emergency lighting, DG backup systems, fire pump electrical supply, lift supply, inverter backup lines for apartments, conduit routing, and BOQ preparation. Design must comply with NBC India, IS standards, and standard electrical engineering practices. --- Scope of Work 1. Indoor Electrical Design - Lighting layout for apartments, commercial areas, corridors, staircases, and common areas - Power layout including switches, sockets, ...

I have three existing Altium Designer projects that must be refreshed before the next manufacturing run at JLCPCB. Both the schematic and the board layout need attention. On the schematic side I already know the exact edits: a handful of parts have to be added or removed, several nets must be reassigned, and a few voltage- and current-related values updated. Once those changes are in place the PCB layouts have to be brought in line—rerouting where required, keeping the original board outlines and mechanical constraints intact, and making sure every DRC/ERC check comes up clean. When the files are solid I need a full, ready-for-upload manufacturing package: • Updated Altium project files (.PrjPcb, .SchDoc, .PcbDoc) • Gerber and NC-Drill set generated with JLCPCB’s ...

Freelance Hardware Engineer – Altium PCB Design Review (Remote Access) We have an existing Pulse Converter PCB designed using Altium Designer and are looking for an experienced freelance hardware / PCB design engineer to perform a technical design review. The work will be done via remote access to our computer (AnyDesk / TeamViewer). Design files will not be shared. Detailed circuit functionality and design context will be explained after mutual agreement and confidentiality alignment. Scope of Work: Review the schematic and PCB layout in Altium Designer and identify potential design issues, risks, and improvement points, including but not limited to: Power input and regulation (wide-range DC input) Relay driver circuits Optocoupler-based pulse input circuits MCU (ESP32 or sim...

I need a robust arc-suppression circuit engineered specifically for my RF welding machine. The goal is simple and non-negotiable: stop destructive arcing before it reaches the generator or matching network, protecting the entire system from costly downtime and repairs. Key points you should know up front • Purpose: prevention of equipment damage only—operator safety circuits are handled elsewhere. • Architecture: solid-state components throughout; no relays or mechanical contacts. • Ratings: I will share the operating voltage and current range once we start, so your design must be adaptable within those limits. What I expect to receive 1. Schematic with clearly labeled protection stages (detection, quench, reset). 2. Bill of materials with manufacturer p...

I have a commerical infrared device I want to push beyond its stock limits by unlocking and fine-tuning the voltage-gating parameters, and explore any additional user-interface controls that govern current (U/I). My end-goal is better overall performance without compromising stability or safety. You will need to access an unknown programmer interface via a 6-pin connector, determine the language, locate the relevant developer-level menus etc, and apply changes. Experience with low-level hardware interfaces a must. Acceptance criteria: • Device boots and functions normally after modifications • Voltage and current settings report the new, target values • Device test and verification prior to final payment • Some minor hardware modifications may be necessary (pr...

I need five separate input-output matching networks for the MACOM CGHV270305, one for each of the following RF bands: • 30–200 MHz • 200–600 MHz • 600 MHz–1.8 GHz • 1.8GHz–4 GHz • 4GHz–6 GHz For every band the network must deliver at least 30 W across the full span while maintaining solid, stable gain. I will verify this from the final performance plots, so please present both power-output and gain data together in clear scatter-plot format. Alongside the simulation results I need production-ready DXF files of the matching PCB layouts. Keep the drawings aligned with recognised industry standards so they can move straight into fabrication without extra re-work. Deliverables 1. S-parameter models (touchstone) and any suppor...

I need a concise Python 3 script that will run on a Raspberry Pi 5 and do the following: • Watch a single GPIO input line for the HIGH digital signal coming from my Sony camera’s built-in AI output. . The Sony camera will be pre-loaded with images of the target - in this case a plant which is detected in the target bounding box in the camera field of view. . When the target plant is encountered in bounding box of the camera field of view, the corresponding relay will activate a spray nozzle for the time the target remains in the bounding box. •The point above is achieved as soon as that digital signal is detected, drive a separate GPIO output that energises a small 5 V solenoid for as long as the target plant remains in the bounding box of the camera, then automatical...

PCB DESIGN with these or better components placement Processor & Memory Main SoC NXP iMX8M Plus — Quad Cortex-A53 1.8GHz + Cortex-M7 800MHz Safety MCU TI TMS570LS3137 — dual-core lockstep Cortex-R4F, SIL-2 certified Diag FPGA Lattice MachXO3LF-9400 — in-situ verification logic, <2ms latency RAM 4 GB LPDDR4, ECC enabled, 1600 MT/s Flash 32GB eMMC 5.1 (AES-256-XTS) + 128MB QSPI NOR boot Wireless MCU ESP32-S3 co-processor (Wi-Fi 6) Sensor Specifications Temperature PT1000 ±0.05°C (primary), DS18B20 ±0.5°C (backup), NTC (tertiary). Range: −40 to +150°C Humidity SHT45 ±1.0%RH + HDC3020 ±1.5%RH. Range: 0–100%RH, 0–85°C Pressure MS5837-02BA 0–2bar ±0.05%FS + MS5837-30BA 0–30bar (secondary) L...

Project Title: Miniature Piezo Preamp PCB (10mm) – Reverse Engineer & Redesign Project Overview I am developing a professional leak detection microphone used for plumbing diagnostics. The system uses a piezoelectric sensor to detect vibration and sound from water leaks inside pipes. I already have a working preamp circuit, but the PCB is too large for my application. I need an experienced electronics engineer to analyze the existing design and redesign it into a much smaller PCB. The new design must maintain similar electrical performance but reduce the physical size so it can be mounted directly on the piezo sensor and permanently sealed with epoxy resin inside a capsule. Primary Objectives 1. Analyze or replicate the functionality of my existing piezo preamp. 2. Redesign ...

I am looking for an experienced PCB designer to create a 4‑layer carrier board for a Raspberry Pi Compute Module 5 (CM5). The board integrates several existing open‑source hardware concepts into a single PCB, with limited original R&D but careful integration and cleanup. Scope of this first project - Review and consolidate existing reference schematics (I will provide open‑source designs and documentation). - Design the final schematic for: - Raspberry Pi CM5 + power supply - CAN‑based bus for a marine/industrial network (NMEA‑style) - NMEA 0183‑style serial interfaces - Connectors and I/O suitable for a small boat/embedded environment - eDP interface for an external display - PCB layout: - 4‑layer stackup with proper impedance control for eDP - Rea...

I am building a tiny GPS tracker device for my company and need an experienced PCB designer. Project Requirements: - Design schematic and PCB layout for a compact GPS tracker. - Use SIM7080G (LTE/NB-IoT with GNSS) module. - Include SIM card slot, GPS antenna connector, LiPo battery connector, and charging circuit. - Board size should be approximately 18 mm x 20 mm. Deliverables: - Complete schematic - PCB layout - Gerber files for manufacturing - Bill of Materials (BOM) - Pick and Place file (optional) Preferred Tools: KiCad, Altium Designer, or EasyEDA. Experience Required: - Experience designing IoT or GPS tracking devices - Knowledge of RF layout and antenna placement Budget: $30 – $50 (negotiable) Please share examples of previous PCB designs.

I’m ready to move an industrial-grade controller from concept to production and need a designer who has already shipped tight, 6-layer boards. The board must host a main microcontroller, its support circuitry, and several high-current power-regulator stages, all within a restricted outline while meeting EMI/EMC limits typical for factory environments. You’ll start from my block diagram and rough schematic notes, turn them into a production-ready layout, and supply every file the assembly house will ask for: updated schematics, stack-up, Gerbers, drill files, pick-and-place, BOM, and a brief design report explaining how the EMC strategy and size targets were achieved. I’ll be available for rapid feedback on component placement and routing choices, and we’ll sign ...

Title: Transformer Design Engineer Needed – Oil Filled Distribution & Solar Transformers Description: We are setting up a transformer manufacturing unit in Vadodara, India and are looking for an experienced electrical design engineer with expertise in oil-filled power/distribution transformers. This is initially a freelance/consulting role to help us develop transformer designs and technical documentation for manufacturing. Scope of Work: • Design of oil-filled distribution transformers (25 kVA – 100 kVA, 11kV / 433V) • Design of solar inverter duty step-up transformers (250 kVA – 500 kVA, 415V / 690V to 11kV) • Preparation of transformer design calculations (core size, winding design, impedance, losses etc.) • Preparation of GA drawings...

Description Of Project - HRID-AI is a low cost handheld device aimed at estimating ejection fraction using multimodal biosignals (ECG, seismocardiography, and cardiac acoustics). It uses a combination of biosensors to detect abnormalities in ECG, presence of abnormal heart sounds and their interpretation as well as usage of seismocardiographic signals to provide an estimate of Ejection Fraction. The principle has been verified through multiple studies done in reputed institutions The goal is rapid point-of-care triage for echo referral in emergency and low-resource settings in patients of Heart Failure with Reduced Ejection fraction We need your support, skills and expertise for sensor integration, embedded design, signal acquisition. Current Status- We have so far been able to dev...

We need an electronics engineer to implement a PCB design based on an existing schematic for a renewable energy monitoring project. The system measures electrical parameters from multiple sources including a solar panel, wind turbine, battery, and inverter output. The schematic already exists in PDF format and includes components such as Arduino Nano Every, MCP3903 ADC, ADS1115, WCS1600 current sensors, and HC-12 communication module. The task is mainly to follow the existing schematic, verify the design, and create a manufacturable PCB layout.

I will provide the full Proteus project (schematic, PCB, libraries). Your task is to recreate that board in Altium Designer as an exact, bit-for-bit copy—same dimensions, traces, footprints and reference designators—so the migrated file can drop-in-replace the original. Once the design lives in Altium, prepare a complete production package for JLCPCB consisting of: • Gerber set generated with Altium’s CAM outputs • Pick-and-place centroid file (CSV) referenced to the board origin JLCPCB expects • Clean BOM that matches the Altium project and includes LCSC part numbers and JLCPCB’s preferred column headings Please keep the design locked as-is; no routing or placement tweaks. Organise the schematic sheets and PCB libraries so I can add compo...

I need an experienced PCB programmer to reprogram a multi-layer PCB for a coffee maker. The board is used for a coffee maker. Required Skills and Experience: - Proficiency in reprogramming multi-layer PCBs - Experience with radio frequency (RF) applications - Knowledge in embedded systems - Familiarity with brewing settings, temperature control, timing and scheduling, and pump control functionalities

I have a new IoT datalogger concept and need a full-fledged PCB layout that is ready to send straight to fabrication. The schematic is not fixed yet, so I’m relying on your board-level expertise to translate high-level requirements into a clean, production-ready design. What I already know • Form factor: credit-card sized (roughly 85 × 55 mm, single board). • Core: a low-power MCU or module capable of handling multiple digital and analog inputs. • Future-proofing: headers or pads for common temperature, humidity, and pressure sensors as well as optional wireless modules (Wi-Fi, Bluetooth, or cellular—final choice can be discussed once power budget is clear). • Power: ability to accept both rechargeable battery input and external DC (buck/boost circuit...

I have an Arduino-based board that is powered from its own DC rail, yet it has to monitor several other DC lines whose grounds are completely separate. Right now I’m simply feeding each line through a voltage divider, and—unsurprisingly—the readings jump around or drift because the grounds are floating. The symptom is clear: inaccurate voltage readings that make the data unusable. What I need is a clean, reliable way to sense those isolated DC voltages without tying the reference points together. Whether that means introducing isolated amplifiers, optocouplers, tiny transformers, or another proven technique is up to you; I’m open to whichever approach gives stable, repeatable results and keeps the measurement side safe for the microcontroller. Here’s what I&...

I need an experienced PCB designer to edit an existing single-sided PCB design. The current design is in Altium and requires modifications for testing and validation. Requirements: - Change component placement - Route traces Ideal Skills and Experience: - Proficiency in reading and editing Altium - Experience in PCB design, especially for testing purposes - Attention to detail and precision Please provide examples of previous work.

I need help turning three off-the-shelf modules now sitting in my glasses prototype—a USB 2.0 hub, a USB audio codec (mic plus stereo out) and a dual-channel Class-D amplifier—into one long, narrow board that can slide inside the temple arm. The space I have measured is roughly 80 mm × 15 mm, so the layout has to be linear rather than squarish, with components placed to keep the height profile as low as practical. The board will run exclusively from the host’s 5 V USB rail; no batteries or additional supplies are planned. Because this is for voice prompts and basic media playback, a standard-grade codec is fine—I’m not chasing audiophile specs, just dependable microphone input and clean stereo output that won’t hiss or pop when the amp is idle. A...

Description Of Project - HRID-AI is a low cost handheld device aimed at estimating ejection fraction using multimodal biosignals (ECG, seismocardiography, and cardiac acoustics). It uses a combination of biosensors to detect abnormalities in ECG, presence of abnormal heart sounds and their interpretation as well as usage of seismocardiographic signals to provide an estimate of Ejection Fraction. The principle has been verified through multiple studies done in reputed institutions The goal is rapid point-of-care triage for echo referral in emergency and low-resource settings in patients of Heart Failure with Reduced Ejection fraction We need your support, skills and expertise for sensor integration, embedded design, signal acquisition. Current Status- We have so far been able to dev...

I need a self-contained unit that lets me key a number on a small touch screen and see that exact value appear instantly on a free-standing LED numerical tower. The goal is true plug-and-play functionality: once mains power is connected, the system should be ready without additional setup, drivers, or calibration. Core requirements • Input: a touch-screen number pad that accepts whole numbers (ideally up to four digits). • Display: an LED tower that shows the number in bright, easily readable digits; the tower must refresh in real time as I enter or change the value. • Form factor: bench-top or floor-standing, compact enough for shop-floor use, with a single power lead and a secure data link between screen and tower. • Reliability: stable operation for 8+ hours...

I need an experienced PCB designer to edit an existing single-sided PCB design. The current design is in Altium and requires modifications for testing and validation. Requirements: - Change component placement - Route traces Ideal Skills and Experience: - Proficiency in reading and editing Altium - Experience in PCB design, especially for testing purposes - Attention to detail and precision Please provide examples of previous work.

Embedded Hardware & Firmware Expert Needed for Industrial 3-Phase Pure Sine Wave Inverter Project Overview: I am seeking an experienced Power Electronics and Embedded Systems Engineer to design the hardware and firmware for an Industrial-Grade 3-Phase Pure Sine Wave Inverter. The project involves designing multiple PCBs (MCU Motherboard, IGBT Driver, Thyristor Driver, and Sensing Interface) and developing robust firmware for system control, monitoring, and HMI integration. 1. Hardware Specifications & PCB Requirements: You will be responsible for designing the following industrial-grade PCBs: • MCU Motherboard: Based on Texas Instruments (TI) or Microchip architecture. Must handle PWM modulation and system logic. • IGBT Driver PCB (3-Phase): Industrial grade, optimized fo...

I require an experienced electrical engineer to upgrade and design systems for an industrial facility. Key tasks include: - Upgrading power distribution and lighting systems - Designing electrical systems to enhance efficiency and safety Ideal Skills and Experience: - Expertise in electrical design for industrial facilities - Proven track record in system upgrades, particularly in power distribution and lighting - Knowledge of industry standards and safety regulations Please provide examples of past work and relevant certifications.

I am looking for an embedded systems developer to write Arduino code to communicate with the MCP3903 energy measurement IC from Microchip using the SPI interface. The goal of the project is to read voltage measurements from three channels of the chip and output the values through the Arduino serial monitor. Hardware: Arduino board (Arduino Uno or compatible) MCP3903 analog front-end IC SPI communication Requirements: The code should: Initialize SPI communication between Arduino and the MCP3903. Configure the MCP3903 registers correctly for basic operation. Read measurement data from the following channels: CH0 CH1 CH2 Convert the raw ADC data into readable voltage values (or at least raw measurement values). Print the measured values continuously to the Arduino Serial Monitor...

**Project Title:** ESP32 Based Educational Robotics PCB Design **Project Description:** I am looking for an experienced PCB designer to design an educational robotics development board. The board will be used for teaching robotics, IoT, and programming to students . The board should be based on an ESP32 module and must integrate multiple components and connectors so students can easily connect motors and sensors. The board should also be compatible with Scratch, so students can control the hardware using Scratch blocks. The freelancer should also create the required firmware or extension file needed to connect the hardware with Scratch. **Key Features Required:** 1. ESP32 module for WiFi and Bluetooth connectivity 2. Motor driver for 2 DC motors 3. Battery connector for rechargeable L...

Project Brief: Kinetic Pulse PCBA 1. Core Functional Requirements Power Input: Must accept AC input from a linear induction coil (approx. 3,000 turns). Energy Storage: Must use a Supercapacitor (1.5F - 2.0F / 5.5V) as the sole energy storage—No chemical batteries. Power Regulation: A boost converter must provide a stable 3.3V rail even as the capacitor discharges down to 0.7V. Power Efficiency: The entire system must be "Nano-power." Total standby/idle current must be < 1µA to ensure the device holds a charge. Timing Logic: An internal timer must trigger a 100ms audible alert (Buzzer) every 40 seconds. Pressure Sensing: The system must interface with a Force Sensitive Resistor (FSR). State 1: Visual Green LED alert when pressure is applied (> 50g). State 2: Visu...