Circuit Design projects — HireLancer archive

ID / Date Listing

ESP32 Expert for Sensor-Integrated PCB Design

I'm seeking an expert in ESP32, someone who has successfully designed and constructed a data-collecting PCB. This device will incorporate 4-5 sensors, such as t...

HL-40072153

IoT Device Developer for Telegram Messaging

Job Title: IoT Button Developer – Telegram Notifications (Assembled or DIY Guide) Project Overview: We need a skilled developer to design a low-power, battery-p...

HL-40071681

Technical Consultation for AC-Coupling Deye Inverter to Sunsynk Hybrid System

I have an existing three-phase hybrid system with 3 × Sunsynk SYNK‑12K‑SG04LP3 inverters (36 kW total), ~44.55 kWp PV DC-connected, each paired with a 14.2 kWh...

HL-40071575

Electronics & Embedded Systems Engineer – Outdoor IoT / Climate-Tech work

We are ClimMaTech Pvt. Ltd., an IIT Mandi–incubated climate-tech startup founded by IIT alumni, working on real-world climate risk monitoring and early-warning...

HL-40070434

Large PCB Design for Radio Control System

Need a smart switch designed for 220v stove, using z-wave protocol to turn on and off switch. Have schematic for 110v version. We are moving from 110 to 220v so...

HL-40070014

Help needed regarding FPGA (Digital Electronics) Projects -- 2

Also, have to record a short demo, and write a simple report.

HL-40069529

Automotive 30 V UPS PCB Design

I need a PCB that will live in a vehicle and turn a 12 – 14.4 V battery feed into a stable 30 V rail, with enough stored energy to ride through engine cranking....

HL-40069547

Prototype PCB Layout Design

I need a PCB laid out strictly for prototype development. I already know the exact length and width the board must fit, and I’ll share those measurements as soo...

HL-40068993

Help needed to design and test basic digital circuits (ALU and counter)

Also, have to record a short demo, and write a simple report.

HL-40068658

Fast-Charge Lithium Battery Prototype

I need a complete, fast-charging lithium battery pack engineered for industrial equipment, rated somewhere in the 1–5 kWh window. I will fund materials and open...

HL-40068233

Multi-Layer Industrial PCB Design

I’m finalising an industrial-grade control module and now need a seasoned PCB engineer to turn my block-level diagram into a production-ready, multi-layer board...

HL-40067885

12V Circuit Board Design

I'm looking for a custom circuit board to power a 12V solenoid and a small 12V motor. The circuit board should regulate power supply and remain active until tri...

HL-40067506

Complete QET Renovation Plan

My single-family house is being renovated and I need a fully detailed electrical installation plan created in QElectroTech. You will start from my room-by-room...

HL-40066378

Arduino Nano DCC PCB Design

Need a compact, single-board solution that seats an Arduino Nano and handles full DCC interfacing for model-rail accessory control. The board’s sole purpose is...

HL-40065793

Custom ESP32 PCB Gerber

I’ve been developing on the ESP32-WROOM-32 and now need a custom board so I can move my prototype off the breadboard. The board should have ESP32, EM18, RTC, Ca...

HL-40064749

ESP32 Schematic & PCB Design

I'm looking for an experienced electronics designer to create a schematic and PCB for an ESP32-based production project. The device will integrate various senso...

HL-40064138

Reverse-Engineer & Redesign Custom PCB

I have a fully assembled circuit board but no original documentation—only a set of high-resolution photos taken from every angle. Your task is to reverse-engine...

HL-40063629

Arduino Retail Jackpot Button Creation with audio

Build a Battery-Powered Retail “Jackpot Button” (Arduino + Audio) Project Description We are an Australian food brand, looking for an experienced electronics /...

HL-40062502

Industrial GNSS Lock Design Refinement

I already have the first-pass schematic for my GNSS-based digital lock / data-logging system and now need a seasoned set of eyes to push it to true production g...

HL-40062437

Custom Voltage Output Circuit Board

I need a small circuit board that takes two 20VDC hot-swap power inputs and provides multiple voltage outputs. Requirements: - Voltage Outputs: 5VDC, 12VDC, 20V...

HL-40061413

Neurostimulation Device Prototype Development

I have a concept for a handheld medical device that administers treatment through targeted neurostimulation, and I now need to turn it into a functional prototy...

HL-40060770

ESP32-S3 Schematic Enhancement

I am using the reference design published here: https://www.waveshare.com/product/arduino/boards-kits/esp32-s3/esp32-s3-lcd-7b.htm and now need that schematic—a...

HL-40060701

ESP32 Pulse-Triggered LED Indicator

I have an Epson TM-T82IIIL (link below) whose cash-drawer kick-out port sends a short 24 V pulse whenever the drawer opens: https://www.netnest.com.au/pos-hardw...

HL-40060360

Custom Xiao RP2350 PCB

I already have a hand-drawn sketch of a board that puts a Seeed Xiao RP2350 module at its heart. What I still need is a complete, production-ready design that t...

HL-40059746

Analog Machine Learning Classifier

https://www.mdpi.com/2079-9292/9/3/515 I need to implement the circuit shown in this paper. Preferably in ltspice or simetrix The circuit is a simple analog bas...

HL-40059514

Multilayer SMD Prototype PCB Design

I need a fresh multilayer PCB laid out strictly for surface-mount devices so I can move my current concept from breadboard to a fully testable prototype. The sc...

HL-40059353

Single-Layer PCB Layout for Prototyping

I need a PCB layout and Gerber files for a pcb component design. This is for an LED-related project and is intended for prototyping. Ideal skills and experience...

HL-40059413

Experienced DC-AC Inverter Design Engineer

I need a DC-AC Pure Sine Wave Inverter design for helping me move from concept to production on a truly rugged DC-AC inverter for industrial machinery. The unit...

HL-40058926

Modify Android Phones to Run without Battery

I have a small stockpile of Android handsets that I want running 24/7 for continuous surveillance tasks, but with the batteries completely removed. Your job is...

HL-40058318

t type cryogen temperature controller

Features & Functional Requirements (Final) Mandatory Core Features Dual independent temperature control channels 2 × T-type thermocouple inputs Temperature oper...

HL-40057799

Smart Switch PCB Design Needed

I need a PCB design and schematic review for a mains-powered smart switch intended for home automation. Key Requirements: - Design for home automation applicati...

HL-40057865

Arduino & ESP32 Board Verification

I already have working schematic and layout files for two open-source inspired products—an Arduino-compatible board in the UNO form factor and an ESP32 DevKit s...

HL-40056786

Portable IoT Ventilator Prototype Development

I’m ready to move from concept to hardware on a compact, IoT-enabled ventilator and need an experienced, multidisciplinary team that can deliver a fully working...

HL-40056380

Design a power module for network board + MCU -- 2

# What is the project about: We are building a cost-optimized, modular Time-Sensitive Networking (TSN) switch based on the Microchip LAN9645xF. We need a Power...

HL-40056180

Embedded firmware task

Very basic functionality; Switch-case logic, inactivity timer and shutdown, wake on falling. 1 DI, 1 AI, LED and PWM

HL-40055595

Custom PCB Design Needed

I’m ready to move an electronic concept from sketch to a production-ready printed circuit board and need an experienced PCB designer to handle the full layout p...

HL-40055404

Design a power module for network board + MCU

What is the projecmt about: We are building a cost-optimized, modular Time-Sensitive Networking (TSN) switch based on the Microchip LAN9645xF. We need a Power E...

HL-40055000

Handheld Massager Development Consultant

I'm seeking an experienced product development consultant to help transform my concept of a handheld massager into a working prototype. The massager will utiliz...

HL-40054807

KiCad Schematic Review & PCB Layout

I have an existing KiCad schematic for a two–sided STM32-based flight controller (roughly 120 components) that needs a professional once-over before we head to...

HL-40054517

Rediseño Placa de Control Eficiente

Dispongo de una placa de control totalmente operativa—Conversión de 12V a 5V, fusible, Conector 40 pin de raspberry, cuatro relays y un buzzer—pero necesito act...