How user testing can make your product great
Get your product into the hands of test users and you'll walk away with valuable insights that could make the difference between success and failure.
Arduino is an open source platform widely used by professional engineers and hobbyists to create interactive electronics projects. An Arduino Engineer is a skilled and experienced individual who can custom-build integrated hardware designs tailored to individual client projects. They are knowledgeable in designing, constructing, and testing cutting-edge hardware projects.
An Arduino engineer can create any kind of electronic circuit design. They are able to develop prototypes for a test version, incorporate vital components such as integrated circuits and relays, code the project with both C and C++ programming languages, as well as generate HTML and Java-based user interfaces. Furthermore, they can assist clients with the setup or installation of hardware or embedded systems.
Here's some projects that our expert Arduino Engineer made real:
The possibilities of what an Arduino Engineer can accomplish are vast. Our select group of engineers have propelled our clients projects into fruition through numerous successful projects. From designing a counter designed for social media followers, to constructing a PCB for advanced Arduino Nanos control systems - our engineers have done it all. And now Freelancer.com invites you to join our international community of experts, who can help bring your own project ideas to life! Post your project now and hire a freelance Arduino engineer on Freelancer today!
Od 31,348 ocen, stranke ocenjujejo Arduino Engineers 4.9 od 5 zvezdic.Arduino is an open source platform widely used by professional engineers and hobbyists to create interactive electronics projects. An Arduino Engineer is a skilled and experienced individual who can custom-build integrated hardware designs tailored to individual client projects. They are knowledgeable in designing, constructing, and testing cutting-edge hardware projects.
An Arduino engineer can create any kind of electronic circuit design. They are able to develop prototypes for a test version, incorporate vital components such as integrated circuits and relays, code the project with both C and C++ programming languages, as well as generate HTML and Java-based user interfaces. Furthermore, they can assist clients with the setup or installation of hardware or embedded systems.
Here's some projects that our expert Arduino Engineer made real:
The possibilities of what an Arduino Engineer can accomplish are vast. Our select group of engineers have propelled our clients projects into fruition through numerous successful projects. From designing a counter designed for social media followers, to constructing a PCB for advanced Arduino Nanos control systems - our engineers have done it all. And now Freelancer.com invites you to join our international community of experts, who can help bring your own project ideas to life! Post your project now and hire a freelance Arduino engineer on Freelancer today!
Od 31,348 ocen, stranke ocenjujejo Arduino Engineers 4.9 od 5 zvezdic.I’m looking for an engineer or a small team to deliver a working prototype of the electronics for a automated shutter project. The system runs on 24V DC and drives two brushed DC motors (each actuator delivers roughly 50 Nm at the output shaft through mechanical gearing). The electronics will sit inside the actuator housing, and I want Wi-Fi connectivity with Home Assistant integration (preferably ESPHome, MQTT is also fine). My preference is one ESP32 controlling both motors, with encoders (A/B) on each output shaft. I will not use limit switches, so the design should include reliable end-position handling without them: travel learning/calibration, position tracking via encoders, and safe stopping based on current sensing and/or “PWM commanded but encoder not moving” l...
I’m preparing two motivated 7th grade student for an upcoming Robotics Olympiad. They already understand the basics of coding and can assemble and drive a simple robotic car, but they now need a mentor who can take them to the next level. The core of the engagement is hands-on, challenge-driven coaching delivered online (preferred) or in person if you are nearby. Sessions should steadily deepen their knowledge while producing small, demonstrable projects they can refine into a competition-ready solution. Focus areas • Advanced programming techniques (efficient C/C++ for embedded systems) • Sensor integration—ultrasonic, IR, line-tracking, IMU, or similar modules • Working confidently with Arduino Uno and Nano boards using the Arduino IDE If you can wea...
I need someone who can program dwin display, What’s left is the code that brings it to life and links it to an Arduino-based controller here in Thailand. The job covers two tightly-coupled parts: 1. Flashing the DWIN display with my existing pages so that every button, slider, and status field behaves exactly as designed. 2. Writing the Arduino firmware that listens to those commands, drives the motors and other actuators, polls the attached sensors, and feeds live values and alerts back to the screen. All three interface tasks are in scope—motor or actuator control, sensor monitoring, and displaying real-time information and adjustable settings—so the sketch will need a clean, well-documented serial protocol that keeps everything perfectly in sync. You’ll hav...
I want to turn a standard RC chassis into a smart, self-aware toy that can do far more than just follow joystick commands. The end goal is a prototype car that: • Detects obstacles in real time • Plans an optimal path around them • Switches between full autonomous driving and classic “manual” mode on demand Everything should be directed from a single mobile app that works seamlessly on both iOS and Android. From that app I need to: 1. Watch a live video feed (low-latency) 2. Toggle between autonomous and manual modes 3. See a simple map of the car’s planned path and any detected hazards 4. Push OTA firmware updates when new AI models are trained Hardware is already on hand (Raspberry Pi 4, camera module, ultrasonic sensors, ESC, and an ESP...
I want to turn ordinary paper into a fully connected writing surface by building a smart pen that streams everything I write or sketch straight to a companion app. The pen must: • capture handwriting and immediately convert it to editable text, • digitize free-hand drawings with stroke-level accuracy, and • recognise simple air gestures for quick commands such as undo or page-switch. All data should travel over Bluetooth Low Energy so the pen feels cable-free and responsive. On the mobile side I need a single code-base or two native apps that run smoothly on both iOS and Android, displaying the incoming strokes in real time while offering export to PDF, SVG or plain text. Core deliverables 1. Hardware prototype with firmware handling sensing, on-board buffering a...
I have an off-road RC platform that I want to turn into a fully autonomous vehicle. The goal is for the car to steer itself, manage throttle and braking, and handle lights/indicators without human input while still allowing me to take over with a transmitter when needed. Here’s what I need from you: • Hardware interface: integrate your preferred control board (Arduino, STM32, Raspberry Pi, or similar) with the existing ESC, steering servo, and LED system. • Software stack: write the embedded code and higher-level logic that handles path-planning, obstacle detection, and failsafe switching back to manual control. • Feature completion: automated steering, speed regulation, and programmable light sequences must all work reliably on rough terrain. Acceptance test 1...
I have a new Segway-style scooter in development and need a seasoned embedded programmer to create the entire self-balancing (gyro/IMU) firmware that will ship on the production boards. The scooter is meant for personal transportation, so reliability, safety and a polished riding feel are non-negotiable. Above all, the control loop must react instantly to rider input—acceleration, braking, tilt corrections—without hunting or lag. I will provide hardware access for bench testing as well as real-world ride data; you will transform that into a finely tuned PID (or equivalent) solution that keeps the deck level and feels natural underfoot. Beyond the core balancing logic, I want a highly customizable interface layer: riders should be able to tweak parameters (speed limits, sensit...
I'm looking for a skilled developer to create MyZmanim, a smart home display device. This device calculates and shows daily religious times based on sunrise and sunset, updating automatically using your location. Key Requirements: - Displays all prayer times - Uses a custom 5-7 inch TFT SPI display with printed casing - Magnets on the back for fridge mounting and a stand for tabletop placement Ideal Skills: - Experience with custom LCD displays & UI - Proficiency in automated time calculation based on geolocation - Knowledge of Arduino IDE code as will be using esp32s
Building a Catholic Prayer Chime Device — Electronics Design Phase We are developing The Angelus Chime, a battery-powered devotional device that plays authentic church bell recordings at 6 AM, 12 PM, and 6 PM. This is Phase 1 focusing exclusively on electronics design. IMPORTANT: This engagement delivers DIGITAL FILES ONLY — No physical prototypes, no assembly, no enclosure work. DEVICE OVERVIEW A sacred object for the home — a device that rings real church bells three times a day, as they have for 700 years across Europe. No app, no WiFi, no Bluetooth. Just bells. CORE FUNCTIONALITY Plays 2-3 minute church bell recordings at prayer times 3 toggle switches for each prayer hour Rotary switch for 8-12 bell recordings on SPI flash Volume control + large mute button Tim...
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 developed the full source code and circuit schematics; however, due to a physical disability, I require a partner to handle the soldering, wiring, and physical housing of the components. Technical Requirements The project consists of two separate units: a Transmitter and a Receiver. Microcontrollers: Program and integrate 2x Arduino boards (provided/specified in schematics). Connectivity: Configure RF modules for proximity detection. Power: Integrate rechargeable battery systems (Li-Po or similar) with charging ports for both units. Assembly: Solder all components according to provided schematics. Enclosure: Mount...
Every morning my iPhone has to be woken, a six-digit PIN entered, a work app opened, credentials typed, several form fields completed and a digital signature placed. I want that entire routine removed from my hands by a small desktop robot. Core flow • Wake the phone from sleep by pressing the side button. • Physically tap the screen to enter the PIN code—no Bluetooth, Face ID or Touch ID, just precise mechanical interaction. • Launch the target app, wait for it to load, populate the login screen and navigate onward until the signature page is reached and signed. I imagine a compact gantry or articulated arm driven by servos or steppers, guided by a microcontroller (Arduino, Raspberry Pi, or similar). Because the touch targets are fixed, a predefined set of c...
My heating installation is already wired with motorised valves and PT-100 temperature sensors; what it still needs is a clean, reliable control program running on a Schneider Electric PLC. All field devices will communicate over Modbus TCP/IP, so the job centres on writing and testing the logic that opens or closes each valve, reads every sensor, and enforces the temperature set-points and safety limits I will provide. You’ll work directly in EcoStruxure Control Expert (Unity Pro), mapping the correct holding/input registers, building the sequence logic (ladder or structured text—your choice), and setting up alarms and manual-override modes. Once the code is ready, I’ll load it on site; remote commissioning support through VPN is essential to fine-tune timing and confirm...
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 forward their information to a third-party server. Core requirements • Meter side: maintain a stable local link to each prepaid electric meter, poll at configurable intervals, queue data when the Wi-Fi link is down, and reconcile immediately after reconnection. • Network side: connect via standard 2.4 GHz Wi-Fi, authenticate securely (WPA2 minimum), and push three distinct data streams—usage statistics, diagnostics snapshots and real-time alerts—through the API endpoints I will supply. • Throughput: normal operating load is small, but latency for real-time alerts must stay below two seconds under fu...
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-Step Guide Have you ever dreamed of building your own remote-controlled car from scratch? In this guide, we’ll walk you through creating a fully functional DIY RC car using affordable, easy-to-find components like the Arduino Uno, joystick module, NRF24L01 wireless transceiver, and L298N motor driver. Whether you’re a hobbyist, a student, or just someone who loves tinkering with electronics, this project is a fun way to learn about wireless communication, motor control, and Arduino programming. By the end, you’ll not only have a working RC car but also a deeper understanding of how these components work...
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 so I can glance at the screen and instantly know what is live. Here’s the vision: every point in the register list appears as a neat visual element that changes colour—green when the point is on, red when it’s off. No extra symbols, just clean coloured indicators laid out logically as per each PLC (6 off) What I will provide: • Product documentation (not very good) You will have to work out register names etc yourself. • Network access to the PLC for testing (via VPN or local session). An initial session can be set up that is connected to a single spare PLC for reference testing if you ...
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 return to its starting line in under four minutes. The only sensing method available is a magnetic sensor array, so all point detection and interaction logic must rely on that hardware. Two run modes have to coexist in the same program and be switchable through a simple flag, jumper, or serial command: • Intermediate – the robot must physically touch the magnet before leaving the point. • Difficult – the robot should recognise the magnetic field, stop just short of contact, and then continue. Between locations, I expect a mix of straight dashes and graceful curves; please handle path planning so the 3pi&r...
I want a single, turnkey application that watches my CCTV feeds, spots shop-lifters in real time, recognises grocery products on the shelves, and keeps a live head-count of customers. The core model must be YOLO, and I need the exact same code-base to compile and run on both Windows (desktop with NVIDIA GPU) and a Raspberry Pi 4. Video sources vary—some cameras stream RTSP over IP while a few older analog units reach the NVR through a capture card—so the program has to accept either type without manual re-configuration. For product recognition I care only about groceries; no clothing or electronics labelling is necessary. The model should be trained (or fine-tuned) on the most common supermarket items so false positives stay low even when shelves are crowded. Key expecta...
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 the speed and torque of the main motor and the speed of a secondary motor. Inputs are presently taken from a custom-made keyboard with tactile push buttons, and motor control is achieved by pulling specific GPIO pins high or low in defined sequences. The objective of this task is to replace the physical keyboard input system with a capacitive touch LCD display, where the on-screen UI buttons will perform the same functions as the existing tactile buttons. The touchscreen interface will control motor on/off, speed, and torque, while ensuring that the existing motor control logic based on GPIO sequences remains functionally the same....
Custom TWS Earbuds Prototype - Earin M-2 Miniaturization** UNIVERSITY PROJECT: Redesign Earin M-2 earbuds SMALLER to reduce ear protrusion. CURRENT SPECS: 24×15×15mm shell, 4g each, 60mAh battery, 4hr playback, BA driver, NFMI sync, touch controls TARGET SPECS: <20×13×12mm shell (33% smaller volume) • Same features or close equivalents • 1-2 FULLY WORKING prototype pairs DELIVERABLES REQUIRED: 1. New shell design (3D printed or molded) 2. Custom PCB layout for reduced volume 3. Component sourcing (mini BA driver, BT/NFMI, 40-50mAh battery) 4. Full assembly + functional testing 5. Audio test + TWS pairing validation I HAVE: • Complete Earin M-2 teardown photos • Exact measurements + target dimensions • Protrusion problem photos &bu...
I new to design a PCB dedicated to processing several signals and starting a device based on a set number of conditions. I would like to be able to modify those parameters from a cloud based or simple web interface. The board should handles both analog and digital. I expect all to be digital signals but just in case. It should basically handle, temperature, humidity and time of day. Deliverables 1. Compiled firmware binaries plus full, buildable project files 2. Clear inline comments and a concise README explaining build steps and pin mappings 3. A short test report that documents signal-integrity measurements and confirms the module meets the agreed specs. 4, Plus device recommendation and also help on setting up. I have an idea, but I am a genetic engineer. I am OK with basi...
I need a full-stack developer who can build an AI-driven application that lets me do two things in one place: first, generate complete music videos, and second, train and manage my own AI models. For the music-video side, the user should be able to pick a visual style and drop in a custom voice track that the system blends seamlessly with the chosen look. Adding extra video effects is something I may explore later, so please keep the architecture flexible enough to plug that in without a rewrite. On the modelling side, I want a workflow that lets me start a new model from scratch, feed in data, train, save, and then reuse that model inside the video generator. Ideally this is handled behind a clean dashboard rather than command-line steps. Core expectations • Intuitive UI/U...
Ho già costruito alcuni prototipi di un circuito in grado di commutare un’unica linea da 230 V, 16–30 A, verso 4, 8 o 12 uscite; --senza perdita di potenza--, nessuno, però, raggiunge ancora gli standard che mi aspetto. Dispongo di schemi, calcoli, misurazioni termiche e log di prova: materiale sufficiente per chiarire ogni dettaglio tecnico e velocizzare il tuo lavoro. Mi occorre un progettista senior che sappia trasformare tutto questo in una soluzione definitiva, completa di firmware su ESP32, con PCB multilayer (4 o 6 strati, produzione JLCPCB - copper 3once) e una simulazione accurata e documentata prima della produzione. Requisiti tecnici da rispettare • Massima efficienza energetica, protezione dei componenti e precisione nella commutazione sot...
I’m running an InHand IG502 cellular gateway and need a focused Python add-on that exposes the unit’s current RSSI (raw dBm) as a holding register inside the built-in Modbus server. The immediate aim is simply to monitor signal quality; once the value is available we will pass it through our existing RS-485 link into the DNP3 layer of the external SCADA. Key points you should know while coding: • Device: InHand IG502 (OpenWrt-based, Python 3 available). • Output format: raw signal strength value, no scaling or percentage. • Register must be readable via Modbus-TCP and Modbus-RTU so I can map it downstream. Byte order can be little-endian; just document what you use. • Communication onward to DNP3 happens on my side, so the script only has to populate ...
I’m putting together a compact desk ornament that spins on command, and I need a complete PCB solution to drive the rotation reliably. The ornament will only move when a small switch is flipped—no sensors, no remotes, just simple manual control feeding a quiet motor. Main Features: • main power source is 5V from USB to DC power jack connected to board via JST-PH cable 2pin socket. • 3.7V 800mAH Lithium chargeable battery as backup power source, connected via JST-XH cable. • 3-way SPDT switch(on, off, timer) connected to the PCB via a JST-XH cable. • 3V DC motor with peak current around 3A, connected to board via JST-PH(2pin) • 2 mounting points (M3 size to allow M2.5 bolts) Here’s what I’m after: • Schematic and PCB layout for a ...
I aim to develop a solution that will facilitate data communication between an Arduino UNO and a SIM7600E using AT+COMMAND. The primary data in focus will be temperature sensor readings. Key Responsibilities: - Setting up a reliable connection between Arduino UNO and SIM7600E - Implement AT+COMMAND for effective communication - Design a protocol for transmitting temperature sensor data Ideal Skills: - Solid knowledge of Arduino - Proficiency in handling SIM7600E - Experience in implementing AT+COMMAND - Understanding of sensor data transmissions. Please ensure you can efficiently deliver on these requirements, and provide the mentioned sensor data communication before placing your bid.
Get your product into the hands of test users and you'll walk away with valuable insights that could make the difference between success and failure.
Learn how to hire and collaborate with a freelance Typeform Specialist to create impactful forms for your business.