Circuit Design projects — HireLancer archive

ID / Date Listing

Proportional Valve Amplifier PCB Design for Industrial Application

I am looking for electronics designer with relevant experience in industrial PCBs (24VDC) and the relevant protection circuits. The goal is to design a PCB to c...

HL-40339986

NoModule PCB Redesign - Ethernet - Switching - POE - DcDc

Our current board is a stack-up of four discrete modules—a POE extractor, 5 V and 12/24V DC/DC stages, and the WT32-eth01 MCU/PHY. I now need all of that logic...

HL-40339988

Hybrid Energy Prototype: Multi-Source Design

Title: Hybrid Energy System Engineer (Multi-Source Prototype Design) Description: I’m developing a new type of energy system focused on generating reliable powe...

HL-40339900

IR Hardware Device; access device firmware & select alternate settings. - 31/03/2026 18:57 EDT

I have a commercial IR-band Laser device with two output power Modes: NORMAL or full-power, and TRAINING, or restricted power. These modes are NOT user-selectab...

HL-40339696

Sistema di Monitoraggio Arnie con Arduino

Devo realizzare un piccolo sistema, alimentato a batteria, che con un Arduino Uno rilevi temperatura e umidità di tre arnie e dell'ambiente esterno. L'installaz...

HL-40338683

PIC PCB & Firmware Development

I need a complete design for a compact consumer-electronics board that revolves around a PIC microcontroller. The scope spans three tightly-linked parts: • PCB...

HL-40337990

Smart Fruit SCADA & PLC

I need a qualified electrician to design and install new electrical wiring for an industrial facility. The scope covers everything from assessing power-load req...

HL-40337737

PCB Design in EasyEDA: ESP32-PICO-D4 base board with 2 sensor inputs, SD card, and expansion headers

I am enclosing the technical specifications in two languages: Russian and English. Прилагаю техническое задание на двух языках: русский и английский Need an exp...

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Compact Reusable Camera Engine Development

We are developing a compact, reusable camera engine (the CVE) for use across multiple applications. The CVE is a two-board stacked module that interfaces with a...

HL-40337214

I am looking for an experienced PCB designer to complete routing for my router PCB project.

I am looking for an experienced PCB designer to complete routing for my router PCB project. The design is based on the STM32 Blue Pill (STM32F103C8T6). I alread...

HL-40337226

Krell 250 Amp Clone

I need an expert to clone the Krell 250 amplifier, focusing on: Audio Quality Replication: - Signal-to-noise ratio - Total harmonic distortion - Overall sound q...

HL-40336819

PCB IC & Microcontroller Replacement Update

I have a PCB design that now needs a round of component swaps—specifically the main microcontroller. All other aspects of the board stay the same; I only need t...

HL-40336693

PCB Replication for up to 7 Boards for lost Gerber and Bill of Materials

This is for US or Canada designers ONLY. If you are not in the US or Canada please don't reply. I am not interested in working outside North America. We will do...

HL-40336297

RF Circuitry for PVC Welders

I need an experienced RF designer to create the core high-frequency circuit that drives a PVC welding machine. The target system already has its mechanical and...

HL-40335602

DC Motor Control Circuit Prototype

I’m building an industrial‐grade DC motor controller and need a complete electronics solution that goes from schematic to a fully tested, working prototype I ca...

HL-40335085

Siemens PLC Wiring As Per IEC 60617 only in AutoCAD..

I’m moving a complete Siemens-based control package from concept to shop-floor and need the full PLC and SCADA wiring designed and documented to IEC 60617. The...

HL-40334706

Double-Layer PCB Design Needed

I am looking for an experienced PCB Designer/Hardware Engineer to design a custom power management board for a BLDC fan system with integrated battery backup. K...

HL-40334510

Piezoelectric Prototype Assembly from Existing Components-URGENT – Assembly & Fabrication Required (Victoria, BC, Canada – Local Only Preferred)

Project Title Piezoelectric Energy Harvesting Circuit – Prototype Assembly (Using Provided Components) Project Description Project related to piezoelectric wind...

HL-40334012

Analog Electronics Educational Lab project

I want a freelancer to do a project for an Analog Electronics Lab. I need it by the 1st of April.

HL-40333458

Residential Grid-Hybrid Inverter Design

I need a full engineering design for a residential-scale hybrid inverter that can seamlessly switch between my rooftop solar array, a lithium battery bank and t...

HL-40333162

PCB Design for Ultra-Compact Wearable Posture Coach (nRF54L15 + LSM6DSO + Haptics) - 28/03/2026 23:07 EDT

I'm developing a compact wearable posture coach device that sticks to the upper back/neck area to detect poor posture and provide real-time haptic feedback. The...

HL-40332968

Altium Schematic & Modifications Needed

I have a new product in the works and need the Altium schematic polished so it is ready for a smooth hand-off to PCB layout and manufacturing. Even though this...

HL-40332661

Control de relés Arduino OLED

Busco un sketch de Arduino que me permita manejar cinco o más relés desde botones físicos y mostrar el estado de cada canal en un display OLED. Qué necesito exa...

HL-40331908

Wearable Temperature Monitor Device Circuit Design

I want to design a PCB circuit for wearable temperature monitoring device,The main module should be square with rounded corners, approximately 30 mm × 30 mm siz...

HL-40331755

ESP32 Prototype PCB

a simple easy project The board is ready on Bread board and i want to print a PCB in a good way, but i need help. I have done the Schematic on EasyEDA Component...

HL-40331612

Educational KiCad PCB Design

I’m putting together a small learning module and need a KiCad-based PCB laid out to illustrate best practices to my students. The board will sit at an intermedi...

HL-40330771

Clinical ECG ESP32 Development

**Title:** Embedded Hardware & Firmware Engineer for ECG Device (ESP32, BLE, PCB Design) --- **Project Description:** We are developing a portable multi-lead EC...

HL-40330675

Residential Lighting Design Using AutoCAD

I need a complete lighting layout for my home produced directly in AutoCAD. The focus is purely residential and the design must cover three distinct zones: the...

HL-40329261

Railway Safety Engineer for Hardware Analysis -- 2

Contract Functional Safety Engineer – FMEDA / FTA / IEC 61508 SIL3 / Railway Seeking an experienced contractor to complete FMEDA, FTA, and hardware safety analy...

HL-40328450

GSM-Based Residential Gas Safety Device Design

Request for Quote – Residential Gas Safety Device GSM-Only (SMS + Voice Calls) + Auto 220V Fan – No App, No WiFi Hi, I’m looking for a skilled embedded engineer...

HL-40327660

Compact PCB Design for Wireless EEG

I'm looking for an experienced PCB designer to create a compact PCB for a wireless EEG system intended for consumer electronics. The system will need to feature...

HL-40327688

AC-DC Asymmetric Converter Build

I need a complete, ready-to-plug-and-play asymmetric AC-to-DC converter for an 8/6 switched-reluctance motor rated at 220 V, 4 A, 500 W. The design must incorpo...

HL-40327470

Compact PCB Design – Battery Powered, USB-C

I’m ready to move an embedded concept into hardware and need a skilled PCB designer to lay out an ultra-compact, circular, 2-layer board. The design pulls toget...

HL-40327256

2 -Layer Consumer Electronics PCB Design

I am developing a compact consumer-electronics device and have reached the stage where a professionally laid-out, multi-layer PCB is essential. The board must f...

HL-40325759

KiCad BQ25570 BMS Schematic

I need a complete KiCad schematic that shows how the BQ25570 energy-harvesting charger and the BQ34Z100-R2 fuel-gauge work together to manage a single-cell 3.7...

HL-40325774

Troubleshoot 1945 Buckley Slot Machine

I own a circa-1945 Buckley Horse Race slot machine that ran perfectly until my grandkids gave it a spirited half-hour workout. The purely mechanical coin mechan...

HL-40325636

Commercial Experience Centre Electrical Layout

I’m fitting out a new commercial Interior Experience Centre and I need a complete set of electrical drawings that I can hand straight to contractors and local a...

HL-40325116

Complete 30 A ESP32 Power PCB - 6 layers

The smart-switch board I am building is already about 80 % routed, tested on the bench, and proven to hit 30 A without thermal drama. What is still missing is t...

HL-40324998

Complex High-Speed PCB Layout - 25/03/2026 08:19 EDT

HAT Board: The schematic for my MYC-LD25X “Hat” board is designed and needs to be checked and a rigorous placement and routing job in Altium Designer. The desig...

HL-40324555

Arduino Cup-Flipping Robot Prototype

I’m building a small, self-contained Arduino gadget that can roll up to a standard cup, sense when it’s in position, and flip the cup over—all without any human...