Circuit Design projects — HireLancer archive

ID / Date Listing

Design a Low-Cost DC Voltage Detection Circuit and PCB in EasyEDA — 120V to 1000V DC

Design a Low-Cost DC Voltage Detection Circuit and PCB in EasyEDA — 120V to 1000V DC **Description:** I need an electronics freelancer to design a simple, funct...

HL-40477988

PCB Design and Circuit Optimization - 4 Layers Circuit 12*12 cm

Scope of Work & Deliverables 1. Circuit & Component Simulation Validate and simulate critical sub-circuits and component behaviors before moving to the layout s...

HL-40477796

Arduino SEQLOCK V1 PCB Design

PROJECT: SEQLOCK V1 COMPONENTS LIST: Arduino Nano (U1) Buck converter MP1584EN 12V→5V (U2) Relay TONGLING SRD-05VDC-SL-C (RLY1) Transistor BC547 (Q1) Diode 1N40...

HL-40477566

Op-Amp PCB Split Redesign

I already have a complete, proven op-amp schematic with a matching single-board layout. For my next round of experiments I want to separate that design into fou...

HL-40477578

5W Class-AB Amp PCB Design

I need a compact 5 W class-AB audio amplifier that can run from a single 12 V supply. Your task is to create the full KiCad project—clean schematic, well-routed...

HL-40476943

Chinese engineer for GR5331AENI + GH3026 Prototype Board

I am building a compact prototype that combines the Goodix GR5331AENI Bluetooth SoC with the GH3026 AFE and optical sensors on a single PCB for early-stage eval...

HL-40476976

nRF9151 IoT PCB Tasarımı

DA / Tasarım Programı Şartı Bu PCB tasarımı Altium Designer ile yapılmalıdır. KiCad, Eagle, Fusion, EasyEDA veya başka bir EDA programı bu proje için tercih edi...

HL-40476880

Installation Électrique Résidentielle Complète la construction et décoration

Je dois faire installer l’ensemble du système électrique d’un logement neuf Le travail porte exclusivement sur de l’installation, construction décoration etc. e...

HL-40476764

Instalación inversor híbrido y tablero -- 2

Necesito sustituir mi inversor actual por un inversor híbrido solar y dejarlo funcionando junto a un banco de baterías de entre 5 y 10 kWh. El trabajo incluye,...

HL-40476220

6-Layer 1000-Pad PCB Layout

The full schematic is complete in KiCAD; what I now need is a production-ready 6-layer layout of roughly 1 000 pads for an item of industrial equipment. The des...

HL-40476045

ESP32-S3 IoT Schematic and PCB Design

I’m looking for a designer who can take an ESP32-S3-WROOM-1-based concept all the way from schematic capture through to a production-ready PCB. The board will i...

HL-40476060

Home and Garage Fire Alarm Setup

I'm looking for a comprehensive heat and fire alarm system for both my garage and home. The system should be self-monitored and include a battery backup. Requir...

HL-40475642

Arduino Nano VRX Sketch

I need a clean, well-commented Arduino Nano V3 sketch that drives the mm238rw 5.8 GHz eight-channel video-receiver module (datasheet link above). The program mu...

HL-40475678

Ohm & Kirchhoff Circuit Report

I need a complete, publication-ready write-up for a hands-on verification of Ohm’s law and both Kirchhoff laws. You will replicate have to read everything in th...

HL-40475262

Wellness Pod PCB Defect Debug

I have a childcare wellness-pod product whose PCB is giving us trouble. The first production run revealed multiple defects, so I now need a fresh set of expert...

HL-40474968

OrCAD to KiCad Complete Redesign

I’m handing over an entire OrCAD project—schematic pages, PCB layout, and custom part libraries—and I need it reborn in the current release of KiCad. This isn’t...

HL-40474690

Signal Processing

I have designed a custom PCB that picks up a small AC signal (~2V amplitude, 10 ns rise time, 250 ns decay) from a sensor operating on a high-voltage DC bias ra...

HL-40474571

Drone Flight Controller PCB Design

I have a new drone project ready for its own compact flight-controller board and I need your help turning the concept into production-ready files. I already kno...

HL-40473002

PCB Routing Engineer Needed

Looking for an experienced PCB routing engineer for a custom electronics project. Requirements: - PCB layout & routing from schematic - RF / high-speed PCB expe...

HL-40472483

KiCad LED PCB update

I have an existing optical board designed in KiCad. I need to replace the muiled (SFH7016) with 3 discrete leds and move PDs aside to make place. • update the s...

HL-40472301

Boundary Scan Debug for SoC Boards

I need an engineer who can set up and execute a boundary-scan (JTAG) workflow aimed at debugging an SoC-based embedded platform. This is to repair a board. The...

HL-40471823

RF-Controlled LED Task Lighting Setup

I need an RF-controlled LED lighting setup for indoor task lighting. The project involves setting up three sets of LED lights, each set containing 12 LEDs. Requ...

HL-40471475

KiCad Schematic and Board Layout Review and corrections

I have a KiCad schematic and board layout and now need a second set of expert eyes before sending it to fabrication at JLCPCB. The board carries two USB-C 5v 3a...

HL-40471501

4 Amp Industrial LED Boost Driver

I need a robust constant-current boost converter that can feed constant 4 Amp to my industrial LED string of 12 LEDs each having forward voltage 3.2V. The suppl...

HL-40471250

USB Resin Art Lighting Circuit Design

I am putting together a new resin-art piece that combines two separate lighting effects: • a small, ready-made neon USB sign that already runs from a USB-A male...

HL-40471127

Tesla Diagnostics Specialist Needed

I’m looking for a seasoned Tesla technician who can remotely or on-site run a full diagnostic of all TESLA vehicle. At the moment I have no confirmed fault code...

HL-40471129

LED Driver Circuit Design - 26/05/2026 15:41 EDT

Constant Current LED Driver Circuit. Requirements: - The circuit should have an input voltage of 10-60 VDC. -Output LED string voltage 2-52 VDC - It should prov...

HL-40470914

pcb design

We are searching for experienced freelancer with handson experience designing pcb for production with onboard esp. Please contact me for more information.

HL-40470885

Flexible PCB Design in EasyEDA

I need a complete EasyEDA project for a flexible PCB that will sit inside a compact consumer-electronics enclosure. The board’s sole job is power management, so...

HL-40470726

Particle Boron Alert Prototype

I have a Particle Boron and want it turned into a small proof-of-concept that watches two reed switches and a single split-core current transformer. Whenever ei...

HL-40470706

Full Circuit Electrical House Layout

I need a complete electrical layout produced. This must cover every circuit in the house, not just lighting or power-point locations. Scope • Produce a full ele...

HL-40470638

Commercial Electrical Diagram for Renovation

I need a detailed electrical diagram for a commercial renovation project. The renovation will include lighting, power outlets, and HVAC systems. Ideal Skills an...

HL-40470352

Urgent: KiCad pcb board with power management issues

Currently i have a pcb, which makes use of an arduino and a meshtastic radio module, The board is supposed to be setup such that it is compatible with (switched...

HL-40469440

Multilayer Medical PCB Design

I’m developing a medical-grade device and need a robust multi-layer PCB that integrates a microcontroller at its core. The board must respect the tighter cleara...

HL-40469021

Altium Multi-Layer PCB Design

I need a multi-layer board laid out in Altium Designer for a new consumer-electronics product. All core circuitry is already defined in a draft schematic; what’...

HL-40468768

On-Site Soldering Microelectronics Specialists Needed

We are seeking 20-30 skilled soldering experts for a PCB project, specifically for a drone, to work on-site in Atlanta, GA (575 Wharton Dr SW, Atlanta, GA 30336...

HL-40468829

KiCad PCB Designer — ESP32-S3 Stepper Controller (Compact, JLCPCB-ready)

Hi! Looking for an experienced KiCad PCB designer to take a partially-spec'd stepper motor controller from a paper concept to a manufactured-ready package. This...

HL-40468749

Diseño de Cierre Inteligente Wearable Infantil

Necesito un diseño integral para un cierre inteligente wearable infantil. El módulo principal debe incluir: - ESP32-C3 - Batería LiPo - Buzzer - Sensor Hall Deb...

HL-40468476

Compact PCB Design for Radio - 25/05/2026 13:04 EDT

I need a basic PCB designed for a radio signal processing application. Requirements: - Single-sided board - 7 through-hole components - Compact layout design Id...

HL-40468034

Multi-Layer PCB Custom Design Needed

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