Electronics projects — HireLancer archive

ID / Date Listing

Prototype Assembly & Housing: Dual Arduino RF Proximity System Project Overview

I am seeking a US-based hardware developer or electronics technician to assemble two physical prototypes of an RF-based proximity system. I have already develop...

HL-40233562

ESP32 Low-Power Audio Device — PCB Design + Firmware (KiCad, Digital Files)

Building a Catholic Prayer Chime Device — Electronics Design Phase We're developing The Angelus Chime, a battery-powered devotional device that plays authentic...

HL-40232601

Connect PCB to Lead-Acid Battery + Sensors Integration (ESP32)

I need an embedded engineer to help safely connect a PCB to a lead-acid battery pack in series and integrate 4 external sensors (temperature, humidity, water pr...

HL-40232983

Ionic Fingerprint Schematic using ESP32

Need getting Ionic Fingerprint from Saliva Need the schematic design circuit for this, with its components

HL-40232659

Wire Harness Testing Schematic and PCB Design

1) Project goal Design a single PCB device for testing cable harnesses up to 25 wires, where both ends of the same harness are connected to the board: Side A: 2...

HL-40232449

IEEE 33-Bus RTDS Model

I would like the IEEE 33-bus distribution feeder recreated in RSCAD v6 so that it runs smoothly in real time on my single-rack RTDS. The base network must be st...

HL-40232350

Adjustable Mechanical Device Development

I'm looking to develop a mechanical device with 4 adjustable roads coming in and going out from the center diagonally. The roads should have adjustable lengths,...

HL-40232360

Stop Remote Neural Harassment and Voice to skull

I have been subjected to to “voice-to-skull” transmission, direct energy weapon and remote neural monitoring(remotely). My main concern right now is the physica...

HL-40232298

Unique Heron Scarer Device

I'm seeking a creative professional to design a unique and effective Heron scarer that operates from inside a property, similar to a room air freshener. Key Fea...

HL-40232146

Universal 12V SMPS Charger PCBA Design

Project Overview I am seeking an experienced Power Electronics and PCB Layout Engineer to design a universal 12V Switch-Mode Power Supply (SMPS) charger PCBA. T...

HL-40232222

Industrial TX/RX Controller based on ESP32: 8× analog + 2× digital + AUX, CAN bus (3.3V transceiver), power outputs with VN5016AJ (5A/channel) — schematic + PCB + enclosure

I’m looking for an experienced electronics designer to develop a complete industrial-grade control system consisting of two devices: 1. Transmitter (TX) – colle...

HL-40232083

Schematic + PCB ESP32version Industrial

I need a complete hardware design based on an ESP32 with CAN-bus communication and ADXL355 plus a gyroscope sensor. I want to receive both the electrical schema...

HL-40231826

TRIAC Traffic Light Controller - ESP32 PCB - easyEda

I need an experienced electronics / PCB engineer to design a reliable 24/7 traffic light controller PCB. This is a safety-critical industrial system, not a hobb...

HL-40231506

Wi-Fi Modem for Smart Meters

I need a purpose-built Wi-Fi modem that can sit in the field, discover and manage between twenty and thirty of my smart prepaid electric meters at once, then fo...

HL-40231374

DIY RC Car Creation Guide

Got it! Here’s a polished and engaging introduction for your blog post that will hook readers right away: Build Your Own DIY RC Car with Arduino – A Step-by-Ste...

HL-40231312

Prototype Development: Wall-Mounted GSM/Satellite Distress Beacon

Seeking experienced hardware engineer to build a prototype of a wall-mounted emergency device. Specs: Form Factor: Wall-mounted, compact, durable enclosure (wea...

HL-40231266

PLC Modbus IO Status Map

I need a clear, single-page overview of every discrete input and output in my Modbus-based PLCs. The goal is to have a graphical layout that refreshes each poll...

HL-40231146

Integrate Solar Charging Solution

My 4.5 V circuit needs a small solar panel and the proper charge-management hardware so daylight tops the battery up automatically. I’m not sure what panel volt...

HL-40230484

3pi Robot Magnet Navigation Code

I need a clean, well-commented Arduino sketch for the Pololu 3pi that lets the robot visit six preset locations, interact with the magnet at each spot, and retu...

HL-40230491

ESP32 MicroPython JPG Display on ILI9341 and ST7789 displays

My setup is an ESP32 wired to a 2.8-inch ILI9341 LCD (I may swap to the 3.2-inch variant; both share the same driver and pinout). All images sit on an SD card;...

HL-40230347

NFC-Based Children's Audio Player Development - 14/02/2026 07:36 EST

Project Description I am developing an educational NFC-based audio player for children (ages 2–7). The concept is simple: a child places an NFC figurine on the...

HL-40230168

LabVIEW Specialist

I need a seasoned LabVIEW developer to turn a loose set of functional ideas into a clean, modular VI that can grow as my project evolves. At this stage the exac...

HL-40229812

Street Lighting Voltage-Drop Design

I have five separate street-lighting circuits, each running roughly 1 km and powered by LED fixtures. For every run I must keep the voltage drop under 3 % . You...

HL-40229560

ESP32 Battery-Powered Audio Device — Full Design Package (PCB + Firmware + 3D Enclosure)

======================================= OVERVIEW ======================================= We need a complete design package for a standalone, battery-powered aud...

HL-40229407

ESP32 – Pruebas y validación de firmware en protoboard (proyecto real en fase final)

DESCRIPCIÓN: Busco estudiante o técnico de electrónica para realizar pruebas y validación de firmware en un proyecto real basado en ESP32. El firmware ya está d...

HL-40229192

Aluminum GC Front-Panel PCB

I need the 2026 GC front panel converted into a production-ready Gerber package so my board house can mill an exact aluminum faceplate. All mechanical data are...

HL-40228512

Medium Complexity PCB Design

I need a medium complexity (3-4 layers) PCB designed for signal processing. The design should be capable of accommodating surface-mount components. Requirements...

HL-40227991

Waterproof Battery-Powered Scales - 13/02/2026 07:04 EST

I'm looking for a device that can measure weight in pounds and operate underwater. It's essential that this device is powered by long-lasting batteries. Key Req...

HL-40227872

Build Motorized Filament Spool Winder

I’d like the design published here https://makerworld.com/en/models/2065480-completely-motorized-filament-respooler turned into a finished, fully-working machin...

HL-40227900

Pdf from a matlab figure

I need someone who can make a landscape pdf from a matlab figure after it was generated The background should be white and labels in black

HL-40227726

Robotic Flexi Cactus Design

I’d like a playful, interactive cactus that mounts on a small vase and behaves almost like a tiny robot. When I trigger it with a micro:bit the body should sway...

HL-40227595

6-Page High-Res PDF

I have a finished KiCad PCB layout and now need a clean, print-ready PDF compiled from it. The final document must contain six A4 landscape pages arranged in th...

HL-40227525

Experienced Technical Writer for STEM Bluetooth Speaker Kit Documentation (Electronics Focus) -- 3

We are seeking an experienced technical writer with a solid background in electronics to update and improve the instructional documentation for our DIY Bluetoot...

HL-40227399

ESP32-based IoT PCB Layout Design & Review

Hello, I am looking for an experienced PCB designer to complete schematic review and PCB layout for an ESP32-based industrial IoT board using EasyEDA (Collabora...

HL-40227208

Freelance Embedded Developer Needed Touchscreen UI for Motor Control (Arduino,Atmega or Stm)

Description: We are developing a prototype of a motor control system based on an existing PCB that uses an ATmega16 microcontroller. The current system controls...

HL-40227274

Double-Layer PCB Design for Radio

I'm seeking an experienced PCB designer to create a double-layer PCB for a consumer electronics radio project. The PCB will include microcontrollers as key comp...

HL-40227092

Custom Firmware Development for ESP32/ESP8266

Project Title: Firmware Driver Development for Custom Hardware on ESP32/ESP8266 (Arduino/PlatformIO) Project Description: We have completed custom hardware deve...

HL-40227034

DSP Tuning for Bluetooth Speaker

I need an expert to tune a DSP (Digital Signal Processor) for a custom-built Bluetooth speaker aimed at delivering a balanced sound profile across all music gen...

HL-40224914

Explain ESP-PIC UART I2C and complete Circuit -- 2

I already have the full schematic and the finished PCB files for a board that combines an ESP module with a PIC18F microcontroller. What I’m missing is a clear,...

HL-40226410

Revise Wiring Schematic

I need an existing wiring schematic revised to add one component. Requirements: - Current schematic is scanned from PDF - Need to add a green pilot light Ideal...