Circuit Design Jobs

I’m building a new electronic digital-lock and need an enthusiastic fresher who wants real-world experience in the technical electronic domain. You’ll work alongside me on everything from early-stage circuit design to basic firmware tweaks, refining the lock’s functionality, helping validate the hardware on the bench, and documenting each step so the work can be replicated later. You do not need years of background—just a solid grasp of electronics fundamentals, the curiosity to learn fast, and the confidence to ask questions. Familiarity with simple microcontrollers, C/C++ or Arduino-style tooling, and any PCB design package will make the ramp-up smoother, but I’m happy to mentor you through unfamiliar areas. Deliverables I expect as we progress: • U...

I'm looking for an experienced freelancer to design a 12-volt power system for my boat, incorporating both solar and wind power sources. The system should include: - Batteries - Inverters - Charge controllers - Lights - Bus bars - receptacles -12 volt refigeration -make sure system is properly rated with wire sizes Ideal skills and experience: - Expertise in renewable energy systems - Experience with marine electrical systems - Knowledge of solar and wind integration - Ability to design safe and efficient electrical layouts Please provide a detailed proposal with your approach and relevant experience.

My car’s brakes have begun squeaking and I can feel the stopping power fading, so I’m looking for a mobile mechanic who can come to me for a full brake service. This is routine maintenance, not an emergency, but I would like it handled soon so the problem doesn’t get worse. Here’s what I expect: • A thorough inspection of pads, rotors and fluid • Clear advice on which components should be replaced or resurfaced • On-site installation of the agreed-upon parts • A road-test afterward to confirm the squeak is gone and braking performance is restored Please bring the appropriate tools for modern disc-brake systems—torque wrench, caliper compressor, brake bleeder, and an OBD scanner in case any codes need clearing. Let me know your earliest av...

I'm seeking an experienced PCB designer to create a single-layer circuit board for a radio prototype. The PCB will include sensors, power management units, and LEDs. Ideal skills and experience: - Proficiency in PCB design software - Experience with single-layer PCB layouts - Knowledge of integrating sensors and power management units - Familiarity with LED circuit design

I have fifteen disassembled original first generation "cigalike" e-cigarettes waiting for fresh new cells. The spent batteries still have to come out; I’ll supply the brand-new replacements along with step-by-step instructions I’ve written from my own repair notes. Once each cell is tinned and soldered, the board and wiring need to slide back into the original metal tubes that I will ship with the lot. After reassembly I need every unit verified for both firing (making sure the LED end eliminates, and it produces vapor,) and charging. A simple functional puff/hit-to-vape check is the first pass, then confirmation that each battery takes and holds a charge using a charging USB that I will provide. If anything reads off, I’d like a quick note so we can decide whe...

I have a circuit idea that now needs to move from the sketchpad to a real-world prototype. The end goal is a fully built, ready-to-power-up PCB that I can use purely for test and evaluation. It is a basic esp32 temperature humidity detector with OLED. This is only to make a working prototype to test. I’m flexible on the technical route you take. Whether the design ends up single-, double- or multi-layer is entirely your call once you’ve balanced trace density, signal integrity and overall cost. The same freedom applies to board size, component selection and any IPC standards you feel are appropriate. What matters most is that the finished board functions reliably for bench testing and arrives with all the data. The project should be created with EasyEDA Deliverables I&rsquo...

I need a clean, ready-to-build schematic for a compact keyboard that uses an Arduino Micro as the controller. The board is for everyday, general use and will be arranged in a 3-row by 3-column matrix, with an additional key to switch between 4 modes. (10 keys in total). Hot-Swap Keyboard for the keys. Add diodes Include a 2 layer LCD Display that can be programmed on the Arduino Pro Mirco. Besides the usual character input, I want a few of those keys assigned to media functions—play, pause, volume up/down—and a couple reserved for custom macros. If you include diode placement and a clear pin map from the key matrix to the Arduino Micro’s GPIO pins, that will make firmware-writing straightforward on my side. PCB must be spaced to fit a 3d Printed enclosure Please del...

I need a compact acquisition board that reads pressure sensors and sends data by Bluetooth and Celullar (SIM). Your job covers both the hardware and the embedded layer that will live on the board. System Requirements : A custom PCB (embedded system) must be designed to interface with the sensor. The system will be powered by an external battery, for which voltage and current requirements must be carefully calculated. The PCB will receive pressure data from the sensor through front-end components directly connected to the electrode outputs. A microcontroller (MCU) will scan the matrix at high frequency by sequentially energizing one electrode (e.g., rows) and measuring responses across perpendicular electrodes (e.g., columns). This scanning process allows detection of pressure points acros...

I need a complete electronic design that takes a 48 V PoE mid-span input and delivers a stable 24 V PoE end-span output at up to 30 W while passing full gigabit Ethernet data. The primary use case is networking equipment, so signal integrity across all four twisted pairs is essential. Here is what I expect from you: • Schematic and fully routed PCB ready for manufacture, supplied as standard Gerber and drill files. • An accompanying datasheet that details electrical characteristics, pin-out, thermal limits, protection features and recommended operating conditions. • Bill of materials with realistic lead-times and two alternative parts for any component prone to shortage. • Design notes that explain key calculations (magnetics, DC-DC conversion, PoE magnetics is...

I'm seeking an experienced power electronics engineer or inverter design firm to create a high-quality, DSP-based, low-frequency, pure sine wave inverter PCB for our brand. Key Requirements: - Power Rating: 3kW - Input Voltage Range: 24V - 48V - Pure Sine Wave Output - Low Frequency Operation - DSP-based Control Ideal Skills and Experience: - Expertise in power electronics and inverter design - Experience with DSP programming and PCB design - Proven track record in similar projects (please include past work in your application) - Ability to meet quality standards and project deadlines Please ensure to provide detailed past work related to this project in your application.

I’m building a compact, 8-port smart Ethernet switch and need a seasoned PCB engineer to turn the concept into production-ready files. Every port will present as standard RJ45, and the board must accommodate the switching chip set, magnetics, power regulation and basic management interface typical of a smart switch, while keeping the footprint tight for a small desktop enclosure. Here is what I expect at hand-off: • Complete, well-labelled schematic and PCB layout (Altium, KiCad or an equally capable tool) • Gerber, drill, and pick-and-place files ready for fabrication • A clean, structured bill of materials with part numbers, tolerances and suggested alternates • Assembly drawings and any special manufacturing notes • Simple bring-up guide so my team can po...

I need detailed design work for the electrical system of a waste paper recycling production line. This includes designing control panels and integrating the system with the BMSB and MCC. Key Requirements: - Detailed engineering design expertise - Focus on electrical systems - Experience with control panel design ________________________________________ 2.1 Electrical Services Design & Documentation Scope of Services 1. Main power distribution design from BMSB-1 and BMSB-2 to all MCCs 2. MCC power and control system design 3. VSD integration design for 10 motors 4. DOL motor control design for remaining motors 5. Power distribution design to all process equipment 6. Cable sizing calculations 7. Voltage drop calculations 8. Fault level review and protection coordination philosophy 9. Ea...

I’m lining up a series of mini-projects and need an extra pair of expert hands. The core of the work is writing clean, well-commented C++ that compiles flawlessly with g++/clang and meets the performance targets I’ll spell out for each task. Most assignments revolve around algorithmic problem solving—think classic contest-style challenges or tighter, system-level routines that have to run quickly and use memory efficiently. Because these projects sit inside my broader electrical-engineering coursework, I’ll occasionally ask for help translating equations into code, checking a circuit calculation, or making a quick tweak to an existing AutoCAD drawing. When the workload peaks, I may also hand over some structured data entry or light technical-support questions (typi...

Seeking a Software Developer & Electronics Engineer building innovative IoT and embedded systems. Must have experience and sample project regarding Vending machine connected with Raspberry pi through MDB-to-RS232. Please include sample project screenshots or url. Answer one question about attached screenshot. "What do numbers in request mean? What is MDB Interface command to vend approval from Raspberry Pi? If you don't include above reference and answers, your bid will be ignored. Best

I'm looking for an experienced circuit designer to create a circuit using ESP32 and TMC5160T. The circuit should support motor control, sensor integration, and communication modules, all controlled via an app I've already designed. Key requirements include: - Motor Control: Implement TMC5160T for precise motor control. - Sensor Integration: Incorporate various sensors as per the app's requirements(Which is to execute a specific Trajectory given by the user). - Communication Module: Utilize ESP32 for robust communication. Ideal skills and experience: - Strong background in circuit design (both analog and digital) - Proven experience with ESP32 and TMC5160T - Familiarity with app-controlled systems - Knowledge in motor control ( Stepper and Brushless ones with encoders )and...

I’m putting together a project that centres on one clear objective: installing brand-new electrical systems from the ground up. The space is a blank slate, so I need someone who can handle everything from bringing power in, running the wiring, setting up the panels, and making sure every outlet, switch, and fixture is safely connected and fully code-compliant. The environment is straightforward but still calls for professional planning—load calculations, proper breaker sizing, clean conduit runs, and tidy terminations all matter to me. If you’re comfortable interpreting plans, sourcing the right materials, and coordinating any required inspections, we should be a great fit. What I’m looking for in your proposal: • A quick outline of your approach to a full sy...

I have a proof-of-concept in mind that will let me switch household appliances on and off from a distance using LoRa and an ESP32. The focus is purely remote control—no fancy scheduling or parameter tweaking for now—so reliability, range and low-latency switching are the priorities. I already work with the Arduino IDE and PlatformIO, but I need someone who has hands-on experience pairing ESP32 boards with the right LoRa transceiver (SX1278, RFM95, or any module you know performs well). You’ll guide the hardware choices, write the firmware, and make sure the receiver node triggers a solid-state relay (or a simple LED during testing) whenever the transmitter sends an ON/OFF command. Deliverables: • Schematic or wiring diagram for both transmitter and receiver nodes ...

DALI Dimmable LED Driver / Controller Design Requirement Project Overview We are looking for an experienced electronics hardware engineer/freelancer to design a commercial-grade DALI dimmable lighting solution suitable for smart lighting and building automation applications. ________________________________________ Required System Design may include one or more of the following: • DALI dimmable LED driver • DALI controller/interface module • DALI communication circuit • PCB and schematic design • Firmware development (if MCU used) • Prototype support ________________________________________ Main Requirements DALI Features • DALI / DALI-2 compatible • Smooth flicker-free dimming • 0–100% brightness control • Individual address...

I need an experienced engineer to design a filter for an aircraft radio system to remove noise generated by flashing LED lights on the wings. Key Requirements: - Design a filter - Ensure specifications meet the required frequency range Ideal Skills: - RF engineering expertise - Experience with passive filter design - Knowledge of aircraft communication systems Please include relevant experience in your application. I envisage two steps: 1. spectral analysis of the noise and demonstration of successful filtering 2. design and build a passive filter to attach to the Trig radio

I need an experienced PCB designer to replicate a multilayer consumer electronics board based on existing schematics. The board is used in a radio device and involves complex signal processing. Key Requirements: - Accurate replication of the existing PCB. - Maintain all signal processing functions. - Ability to work with obsolete designs. Ideal Skills: - Expertise in multilayer PCB design. - Strong background in signal processing circuits. - Experience with outdated technology and schematics. Please provide samples of similar work and estimated timelines.

I’m developing a compact consumer-electronics board built around an ARM Cortex-M device and now need the full PCB layout ready for manufacture. The schematic is largely settled; what I need from you is a clean, production-grade board design that meets EMC best practices and leaves enough headroom for future revisions. Key functional blocks that must be routed: • Wi-Fi module • Bluetooth module • Power-management unit with battery-charging capability • High-speed USB interface • Space for a small “other” expansion header I’ll define during the layout review You are free to work in Altium Designer, KiCad, OrCAD, or another professional tool as long as the output can be supplied in standard Gerber, drill, and assembly files. Delivera...

I have fifteen disassembled original first generation "cigalike" e-cigarettes waiting for fresh new cells. The spent batteries still have to come out; I’ll supply the brand-new replacements along with step-by-step instructions I’ve written from my own repair notes. Once each cell is tinned and soldered, the board and wiring need to slide back into the original metal tubes that I will ship with the lot. After reassembly I need every unit verified for both firing (making sure the LED end eliminates, and it produces vapor,) and charging. A simple functional puff/hit-to-vape check is the first pass, then confirmation that each battery takes and holds a charge using a charging USB that I will provide. If anything reads off, I’d like a quick note so we can decide whe...

I need a Python/Arduino developer to create the code for an Adafruit RP2040 CAN board. The board will take in an analog voltage and output to a CAN based device. Key Requirements: - Converts 0-5V analog signals into CAN-based messages. - Convert can messages coming in and rebroadcasting to a different address - Broadcast status and wake messages to device being controlled. Ideal Skills & Experience: - Proficient in Python and/or Arduino and familiar with Adafruit Feather ecosystem - Experience with CAN protocols and message formats

I need an experienced embedded systems and PCB design engineer to design a compact NFC Reader module based on the ESP32 microcontroller and NFC transceiver. The board should read NFC tags and toggle a relay output to control external devices such as door locks, motors, or other automation equipment. Key Functional Requirements: - ESP32 as the main microcontroller (Wi-Fi & Bluetooth capable) - NFC transceiver - Relay output toggled by ESP32 GPIO when a valid NFC tag is detected - Wide input voltage range: 10–24V DC - Multi-rail power supply: - LED indicator header pins for visual feedback Firmware Requirements: - Read UID from NFC tags - Toggle relay on valid tag detection - Sleep mode support for low power consumption Deliverables: - Complete schematic design - PCB layou...

PROJECT DESCRIPTION: I need a KiCad PCB designer to create three RFID antenna boards from scratch and deliver verified, JLCPCB-ready Gerber files. No existing files will be provided. The designer must create everything in KiCad based on the specifications below. These are rectangular spiral RFID reader antennas operating at 13.56 MHz (ISO 15693 protocol), used in a poker chip tracking system. Each board has a copper spiral on the front layer (), a single return trace on the back layer (), one SMA edge-launch connector, and one SMD tuning capacitor. BOARD 1 — SEAT ANTENNA ParameterValueBoard size210 × 210 mmLayers2 ( + )PCB thickness1.6mm FR4Spiral turns5Track width2.5mmGap between tracks0.5mmOutermost turn200 × 200mm center to centerTuning capacitor14pF, SMD 0805Connecto...

I'm looking for an experienced hardware engineer and PCB designer to deliver schematic and layout for a mixed-signal control board on a tight timeline. This project is best suited for a senior engineer familiar with high-speed signals (~80 MHz SPI) and signal integrity preservation, who can start immediately. The board at a glance: - STM32H753ZI MCU (Cortex-M7, 480 MHz) + flash + USB serial - 14 high-speed analog inputs (~300 kHz range) from precision sensors (mix of bipolar and single-ended in the low-volt range) - 14 analog outputs (mix of ±10 V differential and ±10 V single-ended for driving external actuators) - External high-speed SPI ADC and DAC (you will pick these to read from analog sensors and perform analog output) - Single 12 V or 24 V DC input, on-boar...

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I need a compact, low-power PCB engineered for a wearable that can both record video and react to motion events. The board must support a micro camera module, motion sensor (IMU or PIR, whichever fits best), local storage and a simple interface for later firmware integration. Size, weight and heat dissipation are critical because the PCB will sit inside a small form-factor housing worn on the body. Scope of work • Schematic design, PCB layout and all supporting fabrication files (Gerber, drill, pick-and-place). • Component selection and BOM focused on readily available parts. • Power-management strategy for battery operation: charging circuit, voltage regulation and idle current optimisation. • Preliminary board bring-up documentation so firmware engineers can ...

I’m looking for a skilled hardware-and-firmware engineer to create a SMART Power Distribution Unit that I can move quickly into production. The unit must include: • Remote monitoring of every outlet • Per-outlet and aggregate energy metering • Built-in surge protection that meets standard safety ratings I’d like the communication layer to run over SNMP, so please plan your microcontroller, Ethernet stack, and MIB files around that protocol. If you normally add Modbus or HTTP support, feel free to flag that as an optional extra, but SNMP is essential. 1 inlet 220V 20A, 8 outlet 220V 5A. It case refer 1U measure. Mechanical parts are manufactured by ourside. Core deliverables I expect: 1. Complete electrical schematic and PCB layout (Altium, KiCad, or s...

Hardware Prototyping: GSM-Controlled Motorized Smart Lock (Custom Design) Project Description: I am looking for an experienced Electronics/Hardware Engineer to develop a functional prototype of a custom GSM-based smart lock designed for farmhouse and agricultural security. Unlike standard "plug-and-play" kits, this is a custom-built system designed for high durability and specialized mechanical features. Key Technical Requirements: Microcontroller: Arduino Nano or ESP32 preferred for the initial prototype. GSM Module: Must use SIM800L or a 4G-compatible module (e.g., SIM7600) for remote operation via SMS and Call. Actuation: High-torque 12V DC motor control (Actuator or High-Torque Metal Gear Servo). Custom "Wiggle/Multi-Fire" Logic: The system must be programmed ...

I'm seeking an experienced engineer to design and create a circuit and board specifically for electrolysis to be used in electroplating silver onto metal surfaces. Requirements: - Design a circuit that efficiently supports electrolysis for silver deposition. - Develop a PCB (Printed Circuit Board) that can handle the required current and voltage for electroplating. - Ensure safety measures are integrated to prevent hazards during operation. Ideal Skills & Experience: - Background in electrical engineering or a related field. - Experience with electrolysis and electroplating processes. - Proficiency in PCB design and circuit development. - Knowledge of safety standards related to electrical systems. Please provide examples of similar projects completed. Input: 110 Vac Output: v...

I’m building a small interactive sound board driven by an Arduino and the MPR121 capacitive-touch controller. Between five and eight copper-tape pads will act as the touch points; the moment any pad is tapped it should fire a single, corresponding MP3 track through a DFPlayer Mini, then stop—no looping, no timed fades. Here’s the workflow I need solved: • Code that links each of the MPR121’s channels to its own MP3 file and plays the file once per touch, with simple debouncing so accidental retriggers are avoided. • Reliable wiring that ties the Arduino, MPR121, DFPlayer Mini, a small Class-D amplifier and speaker together, plus a spare GPIO line that can mute the speaker and divert audio to a 3.5 mm headphone jack when a plug is detected. • Eve...

Project Title: Electrical Engineering Support – Design, Analysis & Documentation Project Description: I am looking for a skilled electrical engineer to assist with technical work related to electrical systems. The ideal candidate should have strong knowledge of circuit design, power systems, and electrical analysis. Scope of Work: Electrical circuit design and simulation Load calculation and power distribution planning Preparation of electrical drawings and diagrams Troubleshooting and technical problem-solving Documentation and report preparation Requirements: Degree in Electrical Engineering or related field Experience with tools like AutoCAD, MATLAB, or similar Strong understanding of electrical principles Ability to deliver accurate and timely work Budget &...

I’m putting together a small-run prototype built around an ESP32 S3, small display, micro sd card reader, speaker, and some buttons. I have much of the work completed by a previous designer, but I need help finishing it. I have a schematic, gerbers, BOM, and pick and place files - but I need help finding alternative parts that are actually in stock at JLCPCB. I also need help troubleshooting some potential design issues that Claude has found. I'm not an electrical engineer and need some hand holding to bring the project together.

I need a runnable MATLAB/Simulink file that captures the core behaviour of a Push-Pull DC-DC converter. My focus is on simulation practice rather than deep physical accuracy, so a basic functional representation of the key power-stage elements will do the job. Scope • Model only the transformer, switching devices (two MOSFETs), diodes plus R(load) and L & C filter. • Keep the level of detail functional—no temperature coefficients or parasitic extraction is required. • Allow input voltage, duty cycle, and transformer turns ratio to be parameterized so I can experiment quickly during lab sessions. • Provide simple scopes so I can observe primary currents, secondary voltage, and the switching node waveform. Deliverables 1. .slx file with clear, labelle...

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

Title: Build a USB Power Monitoring Device (ESP32 + INA219 + OLED) Description: I am looking for an embedded systems developer to build a working prototype of a USB power monitoring device. The device should: - Measure Voltage (V), Current (A), and Power (W) - Display values in real-time on a small OLED screen - Work as a pass-through (input power → device → output to phone/load) Preferred components: - INA219 (or similar current/voltage sensor) - ESP32 / Arduino - 0.96” OLED display (I2C) Deliverables: - 1 fully working prototype (hardware) - Clean and working source code - Circuit diagram / wiring schematic - List of components used Nice to have (optional): - Compact design - Basic enclosure (3D printed or simple casing) Budget: Open to proposals (expected ₹1,0...

I need a KiCad specialist to turn my draft concept into a production-ready multi-layer board for an industrial controller. The board must safely handle several high-current rails, so correct copper thickness, generous trace widths, via stitching, and well-planned plane splits are essential. You will start from my block diagram and preliminary net-list, refine the schematic, and then create a clean, rule-compliant layout. Please keep manufacturability in mind: standard stack-up, clear silkscreen, sensible component placement for assembly, and all footprints linked to 3D models where possible. Although high-speed signals and advanced thermal solutions are not priorities at this stage, good practice is always appreciated. Deliverables • KiCad project folder (.kicad_sch, .kicad_pc...

I have an ESP32 Basic Core IoT Development Kit V2.7 installed in my truck and need firmware that will warn me whenever the Starlink router stays powered after I switch the ignition off. The sketch should watch a dedicated ignition-sense pin: while the line is high the unit does nothing special, but as soon as it goes low it must keep polling the Wi-Fi connection status in code. If the ESP32 is still associated with any network after a user configurable amount of time, an on-board LED must begin to flash, screen starts flashing and the internal speaker must chirp in tandem until the Wi-Fi link drops or the ignition is restored. I would like a simple LCD screen interface on the kit’s I²C display that shows real-time states (“Ignition ON / OFF”, “Wi-Fi CONNECT...

Estoy cerrando mi proyecto de fin de carrera en Ingeniería Mecánica y, como parte fundamental, debo presentar la instalación eléctrica completa de un pequeño almacén (aprox. 60 m²). El sistema debe cubrir dos necesidades muy concretas: • Iluminación general mediante luminarias incandescentes, distribuidas para garantizar 200–250 lx en zona de pasillo y estanterías. • Alimentación dedicada para tres máquinas de fabricación (motores trifásicos 400 V, 3 kW c/u) con sus protecciones, arranque directo y previsión de futuras expansiones. Busco el conjunto documental y los cálculos que justifiquen técnica y normativamente la solución: 1. Memoria descriptiva y d...