
Em Andamento
Publicado
Pago na entrega
I want to build a persistence-of-vision LED system that mounts on a standard bicycle wheel and shows crisp, full-color static images whenever the wheel reaches riding speed. The image should appear only at higher RPMs—cruising or sprint speeds—not while I am moving slowly or stopped. Core functionality • An addressable 256 LED spoke mounted strip driven by a small micro-controller (ESP32, Arduino-compatible, or similar) and powered by a lightweight, wheel-mounted battery. • Firmware that stores and renders static bitmaps in correct perspective as the wheel spins, synchronizing via hall-effect or magnet sensor. • A simple phone app that lets the rider pick any image, crop it to a wheel-friendly template, and wirelessly push it to the controller. There is no fixed library; the user must be free to upload whichever picture they like. Threshold speed can be experimented with. Below that threshold, the LEDs can remain off or show a neutral pattern to save power. Brightness should be adjustable so the design remains visible in daylight without draining the battery too quickly. Deliverables 1. Schematic, BOM, and mechanical mounting plan that fits a 26–29″ wheel. 2. Tested firmware with documented source code. 3. Image-upload tool with minimal UX polish and clear build/install instructions. 4. Step-by-step assembly guide to reproduce the prototype locally. Acceptance criteria • At 15 km/h (or agreed RPM) and above, the uploaded image appears stable and recognisable in both daylight and dusk tests. • No uncontrolled flicker below threshold speed. • Image transfer completes in under 30 seconds over Bluetooth or Wi-Fi. • Runtime of at least 1 hour on a single charge of the proposed battery. • Device should be waterproof and shock resistant. If you already have experience with POV displays, addressable LEDs (WS2812, APA102, etc.), and Bluetooth LE or Wi-Fi data transfer, that will speed things up, but feel free to suggest alternative components or clever power-saving tricks—the design is flexible as long as the final effect meets the criteria above. There are similar devices available already that you can use for your development: Similar Unit [login to view URL] Install Video for the Xuan Wheel [login to view URL] GitHub Bike Light Software [login to view URL] Another Similar product [login to view URL]
ID do Projeto: 40291011
106 propostas
Projeto remoto
Ativo há 6 dias
Defina seu orçamento e seu prazo
Seja pago pelo seu trabalho
Descreva sua proposta
É grátis para se inscrever e fazer ofertas em trabalhos
106 freelancers estão ofertando em média $1.134 USD for esse trabalho

Hi there, I’ve studied your Bicycle Wheel LED Image Display idea and I can deliver a solid POV system that shows crisp full-color bitmaps at cruising speeds on a 26-29″ wheel. My approach ensures the image is visible only above a chosen RPM, with LEDs off or neutral below that threshold to save power. The design uses a compact, battery-powered spoke-strip driven by a microcontroller (ESP32 or similar), with a hall sensor to sync image position. I’ll provide a complete schematic, BOM, and a mechanical mounting plan that fits your wheel range, plus tested firmware with well-documented source code. The image-upload tool and a minimal mobile app will let you crop any image to a wheel template and push it wirelessly to the controller. I’ll also include a step-by-step assembly guide and instructions to reproduce the prototype locally. What is your preferred wireless method for initial setup and ongoing image transfer (BLE vs Wi‑Fi), and what button/UX should trigger the image push during a ride? What is the target brightness range for daylight visibility and do you require auto-dimming with battery level? Do you have a specific bi-stable or multi-stage threshold RPM range in mind for visibility vs. power saving? Are there any size or weight constraints for the battery and mounting hardware that would affect the 26–29″ wheel fit? Best regards, Muhammad Awais
$1.500 USD em 28 dias
8,9
8,9

With over 10 years of experience in web and mobile development, I understand the complexity and precision required for your Bicycle Wheel LED Image Display project. Your need for a persistence-of-vision LED system that displays crisp, full-color static images at riding speeds presents an exciting challenge. In the realm of IoT and hardware integration, I have successfully delivered projects similar to yours, ensuring seamless synchronization and user-friendly interfaces. My expertise in addressable LEDs, microcontrollers, and Bluetooth/Wi-Fi data transfer align perfectly with your project requirements. Having worked on innovative tech solutions for various industries, including eCommerce and IoT devices, I am confident in my ability to bring your vision to life. My focus on delivering practical, user-centric designs will ensure that your bicycle wheel LED display functions flawlessly at high speeds. I am eager to discuss how we can collaborate on this project. Feel free to reach out to me through the platform, and let's turn your concept into a reality.
$1.200 USD em 20 dias
8,2
8,2

With my extensive background in digital motor control, analog design and electronic designing, I am the perfect fit for this project. I have hands-on experience with Arduino, Bluetooth, and microcontrollers like ESP32 and ESP8266 – all skills essential to creating your persistence-of-vision LED system. Additionally, I am well-versed in PCB design tools such as Altium and have used them to design power boards, SMPS boards, and more. My knowledge of renewable energy and uninterrupted power supplies will ensure the proposed system is efficient. Regarding your image-upload tool request, I am fluent with MATLAB and Bluetooth/Wi-Fi data transfer – I can guarantee image transfers completed within 30 seconds. To optimize power consumption just below the threshold RPM, I have several power-saving tricks up my sleeve which can increase the runtime of a single charge on a lightweight battery - an essential requisite for an efficient bicycle LED system. In summary, my skills in digital motor control, analog design, and power electronics coupled with deep experience with products similar to this project (as indicated from the links you shared) make me highly competent in handling your needs efficiently.
$750 USD em 15 dias
7,4
7,4

Hello! Thank you for sharing the details of your project - it’s a very interesting application of persistence-of-vision LED technology. Our team has experience working with embedded systems, addressable LEDs, and microcontroller-based hardware projects, including solutions built on ESP32 and Arduino-compatible platforms. We are familiar with developing firmware that synchronizes LED output with hall-effect or magnet sensors to achieve stable POV visual effects, as well as optimizing brightness and power consumption for battery-powered devices. We also have experience building companion mobile tools that allow users to upload images, process them for the hardware format, and transfer them wirelessly via Bluetooth or Wi-Fi. This approach ensures riders can easily upload any image, crop it to the wheel template, and send it directly to the controller. We would be happy to discuss the hardware setup, preferred LED type, and power requirements to ensure the system delivers stable, bright images at riding speed while remaining efficient and durable for outdoor use. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Kateryna Sales department Tangram Canada Inc.
$1.350 USD em 7 dias
7,2
7,2

⭐⭐⭐⭐⭐ CnELIndia and Raman Ladhani can provide end-to-end support in designing the POV LED system, from circuit schematic to mechanical wheel mounting for 26–29″ wheels. Leverage experience with ESP32/Arduino microcontrollers and addressable LED strips (WS2812/APA102) to implement precise bitmap rendering synchronized via hall-effect sensors. Develop firmware optimized for adjustable brightness, power-saving modes, and threshold-speed activation, ensuring stable images at ≥15 km/h. Build a lightweight, wheel-mounted battery solution providing ≥1 hour runtime with waterproof and shock-resistant enclosures. Create a mobile app enabling image selection, cropping, and fast wireless transfer (<30 seconds) via Bluetooth LE or Wi-Fi, with simple UX for riders. Conduct iterative prototyping and daylight/dusk testing to eliminate flicker and verify image stability. Provide full documentation: BOM, assembly guide, firmware source code, and clear build/install instructions to reproduce the prototype locally. Suggest alternative components and clever optimizations for energy efficiency while maintaining image clarity and reliability.
$1.125 USD em 7 dias
6,9
6,9

As a seasoned electronic hardware and firmware engineer, I have spent years perfecting my craft and developing innovative solutions for complex projects just like yours. My focus on designing reliable, high-performance PCBs and power supply circuits aligns perfectly with the core of your project. In fact, I've been responsible for designing and implementing similar persistence-of-vision LED systems driven by Arduino-compatible microcontrollers as well as managing power consumption in IoT devices using ESP32. My expertise also extends to RF Design, allowing me to ensure stable, optimized wireless communication between the controller and your smartphone app. Moreover, my ability to seamlessly program and integrate various wireless technologies - including Bluetooth LE and Wi-Fi - will be invaluable in creating a user-friendly image-upload tool enabling you to pick any image you like. With waterproofing and shock resistance being critical for bicycle accessories like this one, I am pleased to inform you that they are already high on my priority list. Moreover, I am not only dedicated to delivering cost-effective solutions within deadlines but also after-project support to guarantee your usage UNINTERRUPTED; making me an ideal fit for your project! Let's bring this dazzling vision to life!
$1.000 USD em 7 dias
6,7
6,7

As an experienced engineer with over 5 years of practice in delivering efficient and robust solutions across a wide range of systems, I am uniquely qualified to bring your Bicycle Wheel LED Image Display project to life. My skill set includes Arduino, Bluetooth, Circuit Design, Electronics, Mechanical Design, Microcontroller, Mobile App Development and Prototyping - all central to the successful completion of your endeavor. Notably, I have exactly the kind of experience sought for this task: prior work with Persistence-of-Vision (POV) displays, experience with WS2812 and APA102 LEDs as well as Bluetooth LE and Wi-Fi data transfer. At Rashid Tech Solutions, we prioritize projects that necessitate multi-faceted technology integration. Your proposal for a LED system presents such a challenge that we are well-suited to tackle - blending hardware with software and cloud intelligence. Our penchant for long-term, stable solutions aligns closely with your requirements for reliable, full-color static images that appear only at the appropriate RPM and brightness levels while conserving battery. Moreover, our post-delivery support will be invaluable in ensuring the lasting usefulness and effectiveness of the system we build together. Nevertheless, don't just take my word for it - my clients have been generous with their commendations on my technical acumen and commitment to accountability.
$1.300 USD em 7 dias
6,8
6,8

Hi there I read your offer and I can turn this around very quickly. I have experience in display controller design, and I worked with all the MCU that you mentioned. Send me a message and we did discuss the matter. Best regards
$1.125 USD em 1 dia
6,3
6,3

Hi there, You need a shock-resistant, ESP32-driven POV display that renders crisp, full-color images on bicycle wheels above 15 km/h; I specialize in high-speed LED synchronization and rapid BLE data-transfer architectures. --Why me?-- I engineer high-density, waterproof embedded systems using ESP32 microcontrollers and EasyEDA Pro, tailored perfectly for the strict mechanical constraints of rotating wheel assemblies. --My method-- I will pair an ESP32 with APA102 LEDs for their superior high-speed refresh rates, locking the image rendering perspective via a precisely tuned hall-effect interrupt. --Availability-- I am ready to start the schematic and mechanical mounting plan immediately, responding to all communications within two hours. --Post-project support-- Two weeks of active testing to perfectly calibrate your minimum RPM activation thresholds and daylight brightness scaling. --Documentation-- Complete schematic, LCSC-optimized BOM, documented source code, simple image-upload tool, and a step-by-step assembly guide supplied at hand-off. Regards, Majeed
$1.125 USD em 7 dias
6,5
6,5

Hello There!!! ★★★★ (Bicycle Wheel POV LED Image Display System) ★★★★ I understand you want to build a persistence-of-vision LED display mounted on a bicycle wheel that shows full-color images at riding speeds. The system needs firmware synced with a hall sensor, a wireless image upload tool, and efficient power control so visuals appear stable only above the set RPM. ⚜ ESP32 / Arduino microcontroller LED control firmware ⚜ 256 addressable LED strip integration (WS2812/APA102) ⚜ Hall-effect sensor synchronization for POV display ⚜ Wireless image upload via Bluetooth or WiFi ⚜ Mobile tool for cropping and sending wheel images ⚜ Battery optimization and adjustable brightness control ⚜ Complete schematic, BOM and assembly documentation I have 9+ years experiance working with embedded systems, IoT prototypes and LED control systems. Projects involving microcontrollers, sensors and wireless data transfer are something I really enjoy building and testing. My approach would design the circuit with ESP32, create POV rendering firmware synced to RPM using hall sensor, and build a small mobile tool to crop images and push them via BLE/WiFi. Power optimization and waterproof mounting will also be considered. Happy to discuss the prototype and testing plan. Warm Regards, Farhin B.
$756 USD em 15 dias
6,5
6,5

Hello, I’ve gone through your project details, and this is something I can definitely help you with. I have over 10 years of experience in electronics and mobile app development, working with microcontrollers, circuit design, and Bluetooth interfaces. I focus on delivering clean, efficient solutions that align with your needs while ensuring scalability and user-friendly interfaces. I will first review your requirements in depth, suggest the most suitable components, and then proceed with development while keeping you updated at every stage. The addressable LED strip and microcontroller setup you envision is certainly within my expertise, ensuring the LEDs display images crisply and responsively at the desired speeds. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m interested in your project and would love to understand more details to ensure the best approach. Could you clarify: 1. Do you have a specific LED component in mind, or are you open to suggestions? Do you have a specific LED component in mind, or are you open to suggestions? Let’s discuss over chat! Regards, Arpit Jaiswal
$750 USD em 30 dias
7,4
7,4

Hey, Regarding your project, I noticed many overlook the critical need for optimizing database queries to ensure peak performance. My approach focuses on fine-tuning these queries to deliver faster load times and superior efficiency. Most amateurs miss this, leading to sluggish performance and user frustration. In a recent project, I revamped a client's system and improved their query response time by 40%, resulting in a seamless user experience. I also include 30 days of post-deployment bug-fixing at no extra cost. How many concurrent users do you anticipate on your platform? Let's discuss how I can bring this expertise to your project.
$800 USD em 7 dias
5,7
5,7

Hi, Our devs looked at your project, and we noticed a potential architecture bottleneck in scaling your user base efficiently. Our backend leads excel in optimizing such challenges to ensure your system remains robust and adaptable. We'll architect a solution that aligns perfectly with your needs. We recently completed a project for a fintech startup using a MERN stack, scaling their platform to handle millions of transactions daily. The solution boosted their processing speed by 30%, demonstrating our team's capability to deliver powerful results. I'll be your direct technical point of contact, ensuring smooth communication throughout. Plus, we'll set up a staging environment for you to review progress in real-time. How does your team envision the long-term growth of this platform? Let's explore how we can bring your vision to life.
$800 USD em 7 dias
5,6
5,6

Hi! The ESP32 is a solid choice for this POV display, but I'd recommend switching from WS2812B to APA102 LEDs—the SPI-based protocol gives you 20+ MHz clock rates instead of the 800 kHz serial limit, which means full 256-LED strip updates in under 0.5ms rather than 7.68ms. At 15 km/h wheel rotation (~285ms per revolution), this eliminates visible scan lines and gives you the smooth image quality this product needs to stand out. I've built similar rotating display systems, including a 144-LED POV drone propeller display where timing precision was critical. That project used magnetic encoding and interrupt-driven LED control to maintain image stability across variable RPM—directly applicable to your variable bike speed requirement. I also designed a vibration-resistant outdoor BLE sensor node that survived 18 months of field deployment, so I understand the waterproofing and shock challenges that make or break wheel-mounted devices. I checked your attached links and those are helpful for implemenation in our project. I do have all the components on my desk so i can start working on it immediately. We can discuss it more in details in chat. Thanks!
$1.000 USD em 5 dias
5,7
5,7

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas: Embedded C Programming. VHDL/Verilog, Quartus/Vivado, LabVIEW/ Multisim/PSPICE/VLSI MATLAB/SIMULINK Network Simulator NS2/NS3 Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32. IDEs like Keil MDK V5, ATmel studio and MPLab XC8. PLCs / SCADA PCB Designing Proteus, Eagle, KiCAD and Altium IOT Technologies like Ethernet, GSM GPRS. HTTP Restful APIs connection for IOT Communications. Also, we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements.
$1.125 USD em 7 dias
6,0
6,0

Hi there, I’m excited about the opportunity to work on your Bicycle Wheel LED Image Display project. As a top California freelancer, I have extensive experience in developing custom microcontroller projects, including persistence-of-vision displays and Bluetooth-enabled applications. I fully understand the unique requirements on speed thresholds and image rendering, and I am confident I can deliver a reliable solution that meets your specifications. My approach will center around creating a lightweight, efficient design, ensuring that the LED display operates seamlessly as the wheel spins at cruising speeds. I will provide you with a comprehensive schematic and a detailed mechanical mounting plan to fit your 26-29” wheel. Additionally, I will develop the firmware and image-upload tool that allows users to easily manage their images, ensuring smooth operation with minimal power consumption. Let's discuss how we can move forward and address any specific challenges you foresee in this project. What specific images or types of designs do you envision for the LED display? Best regards,
$1.375 USD em 11 dias
5,0
5,0

I am a Mechatronics and Robotics Engineer with hands-on experience in addressable LED control systems, real-time embedded firmware development, and wireless data interfaces for mobile applications. I've implemented persistence-of-vision displays using WS2812B/APA102 LED strips with precise timing synchronization via Hall-effect sensors and microcontroller interrupt-driven rendering to achieve stable, high-resolution images at variable rotational speeds. My expertise includes ESP32-based Bluetooth/WiFi communication for image uploads, power-efficient firmware with speed-threshold detection to disable LEDs at low RPMs, adaptive brightness control for daylight visibility, and ruggedized mechanical designs with waterproof enclosures and vibration-resistant battery mounting for bicycle applications. I deliver complete schematics with sourced BOMs optimized for 26-29 in wheels, documented firmware with bitmap rendering algorithms, a user-friendly mobile app (React Native or Flutter) for image cropping and wireless transfer under 30 seconds, and detailed assembly instructions, ensuring your POV LED system produces crisp, full-color images at riding speed with 1+ hour runtime and robust outdoor performance.
$950 USD em 7 dias
5,1
5,1

❗❕‼️⁉️ Hello ⁉️‼️❕❗ I understand you need a POV LED system for a bicycle wheel that displays full-color images at riding speed with a wireless image-upload app. ❗❕❗❕❗❕ I HAVE SOME QUESTIONS REGARDING THE PROJECT SEND ME A MESSAGE FOR MORE DISCUSSION ❗❕❗❕❗❕ ⇆ ⇆ ⇆ ➷ Design wheel-mounted addressable LED strip with ESP32/Arduino-compatible controller and hall-effect speed sensor ➷ Develop firmware for stable image display, adjustable brightness, and power optimization ➷ Build mobile app for image cropping and wireless upload, with schematic, BOM, and assembly guide ⇆ ⇆ ⇆ I am the best candidate with 7+ years in microcontroller programming, POV LED systems, Bluetooth/Wi-Fi integration, and mechanical prototyping. Approach: prototype the LED and sensor system, test image rendering at speed thresholds, optimize battery and brightness, finalize mobile app UX, deliver full documentation. Happy to discuss further on your requirements. Best Regards, Shaiwan Sheikh
$757 USD em 7 dias
4,9
4,9

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq
$1.005 USD em 7 dias
4,5
4,5

Hello, I understand you want a persistence-of-vision (POV) LED display mounted on a bicycle wheel that renders full-color images only once the wheel reaches riding speed. I have experience with microcontroller firmware, addressable LEDs, and sensor-synchronized displays, and can design a stable system that produces crisp images while keeping power usage efficient. My approach would use an ESP32 controller with WS2812/APA102 LEDs, synchronized via a hall-effect sensor and magnet to detect wheel rotation. Firmware will calculate angular position and render bitmap slices in real time so the image appears stable at speeds above the defined threshold (e.g., ~15 km/h). Brightness control, power-saving logic, and speed-based activation will also be implemented to extend battery life. I will also develop a simple mobile tool (BLE or Wi-Fi) that allows users to upload any image, automatically crop it into the wheel template, convert it into POV frame data, and transfer it to the controller. Deliverables will include schematics, BOM, firmware, mounting design, and a full assembly guide for reliable reproduction. Thanks, Asif.
$1.500 USD em 15 dias
4,9
4,9

Northvale, United States
Método de pagamento verificado
Membro desde mar. 16, 2014
$30-250 USD
$3000-5000 USD
$2401 USD
$30-250 USD
$250-750 USD
₹600-1500 INR
₹12500-37500 INR
$10-30 USD
£20-250 GBP
₹1500-12500 INR
$1500-3000 USD
₹5000-20000 INR
$100-150 USD
₹12500-37500 INR
$10-30 USD
€30-250 EUR
₹750-1250 INR / hora
₹600-1500 INR
$250-750 USD
£250-750 GBP
$375-750 CAD
$250-750 USD
₹12500-37500 INR
₹1500-12500 INR
₹12500-37500 INR