Circuit Design projects — HireLancer archive

ID / Date Listing

Arduino-Controlled LED Pedalboard Setup (UK/London only please)

Arduino-Controlled LED Pedalboard Setup (UK only) Overview: I'm working on an LED lighting project for a guitar pedalboard using an Arduino controller. I need h...

HL-40116042

Full Home Rewiring Installation - 03/01/2026 06:57 EST

I’m upgrading an older Malaysian home and need every circuit replaced, from the main switch-board right down to the last socket. The job is strictly installatio...

HL-40113965

EV Wireless Charging System Diagram

I’m preparing documentation for an electric-vehicle wireless charging concept and need a clear Visio block diagram that focuses on the control circuitry. The dr...

HL-40113983

Compact ESP32 & SIM868 PCB Design

I need a production-ready CAD layout for a single, ultra-compact PCB that merges two existing boards into one tidy footprint. The board’s primary role is data c...

HL-40113801

Disco Button Integration

I'm looking for a skilled developer to create a disco button interface using a Raspberry Pi. The button will be used to perform three main functions: kill the h...

HL-40113376

EV Wireless Charging System Development

I have drafted the functional blocks for an EV wireless charging system and now need the complete electronic circuit drawn in Microsoft Visio. The diagram must...

HL-40113127

Outdoor CO₂ & Audio PCBA

I want to create a PCBA contains ESP32-C3-Mini, SCD41, INMP441, JST-PH 2Pin port serves as the Solar/Charger Input. The port leads directly to LiFePO4 charging...

HL-40112804

KiCad Speaker Crossover PCBs

I need five through-hole passive audio boards laid out in KiCad: two crossover networks and three attenuation modules. The crossover boards must host inductors,...

HL-40111148

Digital Control Circuit Design

I need a digital-only control circuit taken from concept through a production-ready schematic. The task sits firmly in the circuit-design branch of electrical e...

HL-40110047

Device PCB Prototype Design

I need a hardware engineer who can take full ownership of the schematic capture, multilayer PCB layout and initial bring-up. The work covers analog, digital and...

HL-40109971

Touch-Activated Servo Valve Devices

I need two identical, self-contained devices that sense a bare-skin tap through a capacitive touch sensor and, via an Arduino-based circuit, drive a pair of sma...

HL-40109759

Embedded Systems / PCB Engineer for Handheld Children’s Electronic Game (36-Button Device)

I am developing a children’s handheld electronic game device with illuminated buttons. I currently have a working Arduino-based prototype using off-the-shelf co...

HL-40109350

Multilayer PCB Layout Creation

I already have a complete electronic schematic and now need it translated into a production-ready PCB layout. The board is for a compact consumer-electronics pr...

HL-40109077

Compact USB-C PD Sink PCB

Project Scope Design a PCB that accepts three USB-C power-only inputs and provides one USB-C output. All USB-C connectors will be off-board and connected to the...

HL-40108966

Tacktick Display Unit Switch Repair

I'm seeking a skilled technician to address an intermittent on/off switch issue on my Tacktick digital display unit. Requirements: - Diagnose if the switch can...

HL-40107906

Tennis for Two: 1958 Game Replica

I am looking for someone to design and build a fully working physical model of Tennis for Two, the 1958 analog video game created by William Higinbotham. The go...

HL-40107671

Basic Calculator PCB Development

Hobbyist/Inventor seeks electronics engineer (or equivalent) to build a calculator prototype. Nothing fancy---a small and simple PCB with exposed components wou...

HL-40106682

Low-Power Delay Timer Circuit

I’m looking for a discrete-component solution that lets a momentary N.O. dry contact trigger an adjustable delay of 5-60 s (via an off-board potentiometer, only...

HL-40105833

Senior Embedded Engineer (Freelance) – Semi Auto Biochemistry Analyzer

Senior Embedded Engineer (Freelance) – Semi Auto Biochemistry Analyzer Description: We require a senior embedded systems engineer to design, refine, and validat...

HL-40105571

USB Headphone Conversion Design

I already have access to a well-built analog headset; what’s missing is the electronics that will let it appear on any computer as a true USB-A device. I need t...

HL-40105227

Upcycled Multi-source Charge Controller Design

I am creating an Upcycled charge controller project where I use as many parts that can be salvaged or recycled from other common electronic devices as possible....

HL-40104614

Intensive Robotics Mentor for Competition

Project Title: Urgent Robotics Coach Needed for National Level Competition Prep (Grade 7 Student) Description: I am looking for an experienced Robotics Mentor t...

HL-40104495

KiCad Schematic and PCB Designer

I'm seeking an experienced KiCad designer to create both schematics and PCB layouts for my project. I have some components and footprints, but will need advice...

HL-40103352

400-1500 MHz RF Front-End

I’m building a lab-grade signal-testing platform and need a complete RF front-end that cleanly spans 400 MHz to 1.5 GHz. Because the board will sit in front of...

HL-40103369

ESP32 Alarm PCB Design

I have put together a clear block diagram for an ESP32-based alarm controller and now need the full KiCad schematic and a production-ready PCB layout. The core...

HL-40103227

Engineering Base LV-MV-HV Design Support

I need an experienced Aucotec Engineering Base specialist to expand and refine a mixed portfolio of Low-, Medium- and High-Voltage drawings. Some earlier work e...

HL-40102530

PCB Design LCD & DHT22

I’m putting together a compact, battery-powered module that reads a DHT22 and shows the temperature (and eventually humidity) on an LCD. What I need from you is...

HL-40102034

Senior Residential Electrical Engineer

I need an electrical engineer with at least 10 years of experience to work on a residential project in Abu Dhabi. The project involves wiring installation and e...

HL-40098162

Projeto Elétrico Residencial Básico

Vou começar uma construção residencial e preciso criar todo o projeto elétrico do zero. O trabalho envolve elaborar um diagrama elétrico claro para cada circuit...

HL-40101922

End-to-End IoT Hardware Development

I’m bringing a new commercial IoT device to market and need a single engineer who can take the hardware from napkin sketch to tested prototype. The work spans h...

HL-40101707

Immediate Two-Layer KiCAD PCB Design

I’m ready to move fast on a compact double-layer PCB for a consumer-electronics product. The board will host a central microcontroller plus the surrounding powe...

HL-40101600

IoT System for Greenhouse & Aquaculture Monitoring

We are looking for an experienced Embedded Systems & Hardware Design Engineer to develop a professional-grade IoT monitoring system based on ESP32-S3 for: • Gre...

HL-40101144

Gps and sim in PCB

I want to develop an rectangular PCB which have GPS and 4G sim and one button

HL-40100422

Long-Range Distance Sensor

I need a custom distance-measuring sensor that can reliably detect objects at ranges greater than 10 m. The core deliverable is a working design—hardware plus f...

HL-40099724

Need Electronics engineer for designing and developing electronic circuit for my hydrophonic project.

Hello, I am developing a compact hydrophonic system. I need an electronic engineer proficient in designing and developing the whole circuit. He/she will have to...

HL-40098888

SHDJ Servo Driver Setup Assistance

I have a 24 V DC servo from SHDJ (Sinheng Motors) paired with their D-AIS48015A driver and I’m trying to run it from a Raspberry Pi Pico. Here’s what I’ve done...

HL-40098413

Exiting KiCad9 project enhancements

Add a few items to the existing project. I have KiCad project including Schematic and pcb design. Schematic pdf is attached. The task is strictly additive. Keep...

HL-40098089

SMART LPG MONITORING DEVICE

Developing a battery-backed LPG gas safety device and looking for a senior embedded hardware engineer for EVT design.

HL-40097293

Custom DC-DC Buck Converter

I need a DC-DC converter prototype as per the following parameters: Power Rating: 150W Input: 16-32V DC Output: 5V, 30A Output Variation: 2-5V using a 10K Ohm E...

HL-40097297

Custom DC-DC Buck Boost Converter

I need a DC-DC converter prototype as per the following parameters: Power Rating: 150W Input: 16-32V DC Output: 28V, 5.5A Output Variation: 10-28V using a 10K O...