Circuit Design projects — HireLancer archive

ID / Date Listing

Design Logic Diagrams and Schematic

I need two logic diagrams a Part A and Part B and a circuit schematic designed. The focus is on sequential logic diagrams. The diagrams can be hand-drawn sketch...

HL-39780521

Precor 800 UBK Touchscreen Fix

My Precor 800 UBK bike sat unused for a few years, and when I powered it back up the console lit as normal but the touchscreen stayed completely unresponsive. I...

HL-39779458

Wi-Fi HaLow MM6108 PCB

I’m building a telecommunications-grade remote-monitoring node that must use Wi-Fi HaLow in the sub-1 GHz band. The heart of the design is the MM6108 transceive...

HL-39778605

PCB Development, Assembly and Testing Services for ESP32 IoT Project

Dear Freelancer, I am currently developing an IoT device based on the ESP32. I need a partner who can take my project from initial schematic to fully tested and...

HL-39778481

Custom 3-Digit LED PCB

I’m designing a compact three-digit, common-cathode display where every segment is built from individual LEDs rather than off-the-shelf 7-segment modules. I wan...

HL-39778296

Smart Litter Box Control System Development

Job Title: Cat Litter Box Arduino/ESP32 Smart Control System Development Project Description: I am looking for an experienced embedded systems or IoT developer...

HL-39777070

Dipole UHF Matching Network Design

The task centres on a UHF dipole that must present the lowest possible return loss to its 50 Ω feed. I will provide the physical dimensions and intended mountin...

HL-39776696

MATLAB /Simulink expert with Power Electronics Background who can simulate converter simulation

HL-39775469

VHDL implementation of semi-parallel filter architecture

I'm finishing my TFG on FPGA implementation, I need someone to help me with the semi-parallel architecture of a filter bank, I have the code done and the design...

HL-39774142

Custom Parametric EQ Board

I’m building a 200 W / 400 W amplifier and need a dedicated board that lets me shape bass and treble with real authority. The heart of the design must be a para...

HL-39773902

PCB Design for Wearable Assistive Device

I have built a working prototype of a wearable assistive device for deaf/hard-of-hearing individuals. The device uses an Arduino Nano, an ultrasonic sensor, and...

HL-39773485

Custom PCIe x1 DMA Interposer Card Development

Hardware Description – DMA Interposer Card Overview The DMA Interposer Card is a custom PCIe x1 device designed to interface between a host computer and a downs...

HL-39773283

OrCad to Altium Conversion

I need a simple, multilayer PCB design converted from OrCad to Altium. Ideal skills and experience include: - Proficiency in both OrCad and Altium - Experience...

HL-39772720

Electrical Layout & SLD for Office urgent

Few Electrical Points already did, Remains layout need o finish And Then SLD I need a comprehensive electrical layout and Single Line Diagram (SLD) for a small...

HL-39772518

EMG Acquisition Circuit Design.

I'm seeking an experienced engineer to design an EMG signal acquisition circuit, tailored for wearable fitness devices. The circuit will be used for muscle acti...

HL-39772029

Bluebeam Electrical Circuit Layout Drawings

Four electrical drawings must be produced directly in Bluebeam Revu. Each drawing will show the complete circuit layout for its respective area, using clear lay...

HL-39771572

Arduino Home Automation System

I need assistance with developing a litter box system using Arduino Uno. The project focuses on automating a conveyor belt system driven by a 12V DC motor, whic...

HL-39769870

Electrical Layout & SLD for Office

Few Electrical Points already did, Remains layout need o finish And Then SLD I need a comprehensive electrical layout and Single Line Diagram (SLD) for a small...

HL-39769726

Fix SIMCom 4G Mic Issue

My custom 4G board is built around a SIMCom A7672 Lase cellular module, and every subsystem except the analog microphone path is behaving. A standard two-wire e...

HL-39765739

Flex PCB for Surgical Instrument

I need a flex PCB designed, populated, and manufactured for use in a medical device, specifically a surgical instrument. The PCB should be small, under 5 cm², t...

HL-39765778

KiCad Board Fix & Update

I’m working with a 2-layer circuit board carrying just 43 parts. The design has run reliably for a while, but after I added surface-mount headers to host a W550...

HL-39765251

Tricolor Dimmable Lamp Electronics

I’m building a line of premium desk lamps that pair resin shades with cement bases for the U.S. market, and I need rock-solid electronics behind them. Each lamp...

HL-39764995

EGS002 Module - Inverter expert

Looking for someone that has built an inverter using EGS002 module to help with some issues we running into. Must be a power system expert

HL-39763412

Compact PCB design based on TI EVM430-FR6043 board - 05/09/2025 03:25 EDT

Project Overview: We are seeking an experienced freelance PCB designer to create a compact, minimum 4-layer PCB for an ultrasonic flow meter based on Texas Inst...

HL-39763042

Custom Keyboard Action Trigger

I need a solution to physically press a keyboard button to trigger a specific action. The goal is to emulate the Razer Turbo feature of the Razer Software, but...

HL-39761766

Raspberry Pi Pico PCB Redesign

The goal is to refresh an existing circuit board used in a consumer-electronics product so that the Raspberry Pi Pico becomes the core microcontroller. The orig...

HL-39761247

PCB Design for a music & light controller

NOTE: This is a REPOST due to the lack of serious freelancers! - 1 got removed by Freelancer.com - several gave fake bids I need a PCB designed for a Teensy 4.1...

HL-39759693

Cotizacion pasar circuito logico

Necesito que pasen mi circuito lógico de logisim a schematic y PCB si me pueden cotizar schematic y PCB

HL-39759675

ESP32 Household Current Monitor

I want to assemble a small, self-contained system that lets me watch the electrical load inside my house in real time. The core is an ESP32 that reads an ACS712...

HL-39759177

ESP32 Home Automation Setup

I need assistance setting up an ESP32-cam for a home automation project. The primary purpose is to integrate the ESP32-cam to a reed switch and program it to ta...

HL-39759062

RF Load Cell Transmitter & Receiver Design - 03/09/2025 16:03 EDT

Summary Project Title:Design of Industrial RF Load Cell Transmitter & Receiver System (Zigbee/2.4 GHz) Project Overview: We are developing a wireless load measu...

HL-39758108

Diagnose & Fix Electric Scooter

My electric scooter began acting up within the last week. It still powers on and will sometimes run, but performance cuts in and out with no clear pattern. The...

HL-39758166

PCB Design for High-Current DC Motor

I need a PCB designed to interconnect with an old DC motor rated at more than 15A. The voltage rating of the motor is not standard (60VDC). Requirements: - Desi...

HL-39757402

Compact Home Automation PCB Design

I need a custom-designed PCB for home automation applications, built around the ESP32 DevKit V1. The PCB will control: - AC loads via Omron G5LE SPDT relays, op...

HL-39757420

Convert Gerber PCB to EasyEDA

I need a Gerber PCB designed in Easy pc converted into EasyEDA. This is for production purposes. The coordinates for components are required to be added for a p...

HL-39757139

Double-Layer PCB Gerber Development

I’m ready to move a new double-layer board into production and need a seasoned PCB designer to generate clean, fabrication-ready Gerber files. The schematic and...

HL-39756139

SkyCAD Electrical Diagram Design

I need an electrical diagram created with SkyCAD. The diagram should provide a system overview and include circuit breakers and relays. Requirements: - Experien...

HL-39755632

KiCad PCB Design for Raspberry Pi Controller with NEMA 34 Stepper Motor, Driver, and 12V Relay

I need an experienced electronics engineer or PCB designer to create a complete KiCad schematic and PCB layout for my Raspberry Pi-based controller project. The...

HL-39755474

Staff Alert Calling Gadget

I'm seeking a skilled developer to create a calling gadget for my shop. The device will help me call staff without verbal communication. Requirements: - A box w...

HL-39755287

Universal Sensor Hub Raspberry Pi HAT

Hello, I’m looking to develop a custom Raspberry Pi HAT that acts as a universal sensor and interface hub for high-end projects. The goal is to significantly re...