Circuit Design projects — HireLancer archive

ID / Date Listing

Custom PCB Design for Solar-Powered IoT Field Device (Pest Trap Monitoring)

We are building a solar-powered, low-power IoT field device used outdoors in orchards. We need an experienced PCB design engineer to develop a custom PCB that i...

HL-40275163

DIY Tower Speaker PCB Design

I’m building a pair of DIY tower speakers and need a custom-designed, two-layer PCB that ties everything together. The board must fit comfortably inside the cab...

HL-40275092

Kinetic Pulse PCBA Design & Creation

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 S...

HL-40274539

Breadboard Wiring & Firmware Development

I am an independent R&D developer prototyping a compact, battery-powered thermal enclosure designed to maintain a strict 25°C internal temperature for sensitive...

HL-40272764

Smoke Extraction System Simulation (CFD Analysis) for Building

I am looking for an experienced Mechanical / Fire Protection Engineer to perform a Smoke Extraction System Simulation for a building project. The objective is t...

HL-40272631

Smart Parking Disc Modification -- 10

Project Brief: Stealth-Modified Automatic Parking Disc (Certified for Public Road Use in Germany) Project Goal: I want to technically modify a certified electro...

HL-40271898

Multiplexer & Demux Circuit Design-tutor needed

I’m working through the combinational-circuits portion of my digital design course and need hands-on support to design and fully implement multiplexers and demu...

HL-40271674

Zigbee Thermostat Development

I want help building a simple zigbee device to use as a smart thermostat. its using a esp c6 super mini, screen, 2 buttons and a presence sensor. I have tested...

HL-40271588

Matlab to PLECS EV Charger Conversion

I'm seeking an experienced engineer to convert a Matlab simulation of a three-phase EV charger into PLECS. Requirements: - Expertise in power electronics, speci...

HL-40271259

Senior Electrical Engineer for Device Schematic Review

We are seeking a senior electrical engineer to perform a professional schematic review of a bio-impedance based glucose measurement device. The system includes:...

HL-40271300

nRF52832 RF PCB Layout

I have a nearly finished schematic for a small, nRF52832–based board and now need it turned into a production-ready PCB in KiCad. Before traces are drawn I’d li...

HL-40270704

KiCad PCB Design — RS-485 Temperature/Humidity Sensor

We need a PCB designed in KiCad 8.x for a compact RS-485 sensor node that measures temperature and humidity. Quality, DFM compliance, and proper protection circ...

HL-40270452

IoT Weather Monitoring System using ESP32 (Python-Based Firmware + Simulation Mode)

We are looking for an experienced IoT/ESP32 developer to assist with hardware connections and configuration for a Weather Monitoring System. We already have the...

HL-40270125

Industrial PCB Designer (ESP32-S3, 24V Power, EMI/EMC, IP65 Enclosure) – IoT Pulse Controller for Car Wash/Vacuum

Project Overview We are building a V1 industrial ESP32-S3 pulse controller for self-service car wash and vacuum stations. The device receives paid commands from...

HL-40268862

Comprehensive Home Electrical Design

I’m ready to move from rough sketches to a fully-specified electrical design for my new build and need a professional set of documents I can hand straight to th...

HL-40268647

Ultra-Slim No-Neutral Smart Switch -- 2

I need a compact, single-fire line smart light switch designed around the ESP32-C3, strictly for residential use and housed in a PC-V0 enclosure. Because there...

HL-40267173

Engineer for Advanced PCB Design & Programming

We are looking for an engineer team which has a good PCB design skill and motor driver programming skill. This project is to upgrade our exhisting PCB(Old versi...

HL-40267920

Installation électrique résidentielle complète

Je rénove entièrement mon logement et j’ai besoin d’une installation électrique résidentielle neuve. Le service attendu porte uniquement sur l’installation : •...

HL-40267081

Custom 5G Flip/Slider Phone Consultation

I’m in the concept stage of a passion project: putting full-featured 5G with Band 71 support into a nostalgic flip or slider body. Before investing in boards, a...

HL-40265838

Single-Layer Op-Amp PCB

I’m putting together a small hobby circuit centered on about 16 operational amplifier based aidiotic filters and need a clean, single-layer PCB layout to bring...

HL-40265683

Electronics Circuit Design, Development, PCB Designing and Prototyping

I need a skilled electronics circuit designer specializing in power electronics. The project involves designing a power supply for a phone charging system using...

HL-40265518

Commercial Wiring Diagram Shop Drawings

I need complete Commercial Wiring Diagram Shop Drawings I expect: • Fully detailed wiring diagrams for the entire commercial space • Circuit tagging that matche...

HL-40265547

STM32-Based UPS Redesign and Firmware Development

Project Title: 600VA Pure Sine Wave Offline UPS Design (STM32 Based) Project Description: We are looking for an experienced Embedded Hardware and Firmware Engin...

HL-40265233

Industrial ESP32-S3 PCB Design (Flux.ai)

Industrial ESP32-S3 PCB Design (Flux.ai) Project Overview I am looking for an experienced PCB designer to complete a custom industrial control board based aroun...

HL-40264849

ZK Developer: Privacy-Preserving Verification Module (Circom/Solidity)

CSPDAO is developing a zero-knowledge proof system to allow users to verify membership status without revealing personal identity data. We require an experience...

HL-40263335

Looking for PCB Layout Partner (Long-term, Stable Work / Altium/PADS)

We are a Korean pcb cad service company with 20 years of experience, seeking to outsource pcb layout tasks, primarily focusing on routing and layout optimizatio...

HL-40263142

Ongoing PCB Routing & Layout Partnership

We are a Korean pcb cad service company with 20 years of experience, seeking to outsource pcb layout tasks, primarily focusing on routing and layout optimizatio...

HL-40263154

6 Channel relay project 2x small pcb's Proffesional finish not hobby

1. Project Overview Design and deliver two integrated printed circuit boards forming a robust 12V automotive-style switching and power distribution system rated...

HL-40262676

Single-Layer Hobby Op-Amp PCB

I’m putting together a small hobby circuit centred on an operational amplifier and need a clean, single-layer PCB layout to bring it to life. The schematic is a...

HL-40262209

Ultra-Slim No-Neutral Smart Switch

I need a compact, single-fire line smart light switch designed around the ESP32-C3, strictly for residential use and housed in a PC-V0 enclosure. Because there...

HL-40262128

Raspberry Pi Zero LoRa Interface PCB -- 2

I’m putting together a compact add-on board for a Raspberry Pi Zero 2 W that will serve as the “all-in-one” backbone of a small, battery-powered LoRa project. T...

HL-40261157

Solve 24 Electronic Feedback Problems

I’m wrapping up the second edition of my book “Electronic Circuits Fundamentals – With MathCad Examples.” Twenty-four end-of-chapter questions on Electronic Fee...

HL-40261174

Smart AC Switch PCB Design

I need a production-ready PCB that will sit at the heart of a home-automation AC switch, much like the popular Wi-Fi smart plugs. A single-layer layout is prefe...

HL-40258520

Wire Harness Testing Schematic and PCB Design -- 2

1) Project goal Design a single PCB device for testing cable harnesses up to 25 wires, where both ends of the same harness are connected to the board: Side A: 2...

HL-40258702

Fusion 360 Multi-Layer PCB Design

Long-Term Freelance PCB Designer – Fusion 360 (Eagle) We are looking for a long-term freelance PCB designer for ongoing projects. Tasks include: Updating schema...

HL-40258719

Comprehensive Voltage Adder Cell DC-DC boost Converter Design -- 3

The hardware circuit design and hardware implementation of a 2nd stage voltage adder cell (VAC) integrated with a classical DC–DC boost converter using a SiC MO...

HL-40258586

PCB adapter design: JLCPCB Samtec CLM-110-02-H-D (C3320770) to 2.54mm 1×10 header (Raspberry Pi SPI breakout)

Description: I need a simple 2-layer PCB adapter designed and delivered as manufacturing files for JLCPCB. Goal Create a PCB that breaks out a 20-pin (2×10) 1.0...

HL-40257533

Wearable Device Power PCB Design

I need a power PCB designed specifically for a consumer-grade wearable device. The PCB must incorporate battery management functionalities to ensure efficient p...

HL-40256869

Custom Wearable Sensor PCB Design

I’m consolidating the electronics of my wearable prototype into one slim, production-ready board. Right now the device is a stack of breakout modules—an ESP32-C...

HL-40256135

Isolated 12 V SMPS Design

I have an ER28 fly-back transformer on hand (model HT-ER2828-801A or an equivalent you may suggest) and need a compact isolated power stage built around it. The...