
Đã đóng
Đã đăng vào
Thanh toán khi bàn giao
I’ve completed the physical shell for a phone case with a built-in drawer. I now need a freelancer to design and prototype the **electronics + firmware** that detects drawer activity and reliably sends events to the phone/app which I have already developed. (what I need built): * Recommend the best sensing approach to detect **drawer open/close** (magnetic reed/Hall, microswitch, optical, etc.) and design around the case constraints. * Select components and create a complete electronics design: * **Low-power microcontroller + BLE** (or comparable phone connectivity) * Sensor(s) for drawer state * Battery + charging solution (or wired power if strongly recommended) * LED indicator (subtle, optional but preferred) * Provide: * Schematic, BOM, and PCB layout (compact, manufacturable) * Firmware that broadcasts drawer events to the phone (BLE event + timestamp) * Basic power optimization (sleep modes, battery life plan) * Assembly guidance + wiring/placement instructions to fit the existing case shell * Prototype support: help validate that the hardware works reliably inside the case (debounce, false trigger prevention, signal stability). Key requirements: * Drawer event detection must be **accurate and repeatable** (no false opens in a pocket/bag). * Must fit within a tight form factor and not interfere with drawer motion or phone use. * Battery life should be practical for daily use (low-power design is important). * Deliverables must be clear enough for me to hand off to manufacturing later. Nice to have: * Experience with wearable/IoT hardware, BLE peripherals, and ultra-low-power design. * Suggestions for DFM and scalable manufacturing.
Mã dự án: 40235838
35 đề xuất
Dự án từ xa
Hoạt động 21 ngày trước
Thiết lập ngân sách và thời gian
Nhận thanh toán cho công việc
Phác thảo đề xuất của bạn
Miễn phí đăng ký và cháo giá cho công việc
35 freelancer chào giá trung bình $498 USD cho công việc này

Hello, As a seasoned and adaptable team of engineers, we at Live Experts ensure precision and quality in every project – and your Phone Case Electronics venture couldn't be a more suitable fit. Our expertise lies in areas that align remarkably with your requirements for the design and prototyping of the electronics and firmware to synergize with your phone app. Noticeably experienced in low-power design with Battery Life Plan, we can adeptly navigate the tight form factor confinement without hampering drawer motion or phone usage. Our proficiency with different types of sensors, including magnetic reed/Hall, microswitch, and optical, enable us to decide the best approach for accurate and repeatable **drawer open/close** detection. We can craft an intricate scheme with low-power microcontrollers enabling BLE connectivity for seamless transfer of information from the case to your app. Moreover, our adeptness with DFM (Design for Manufacturing) will ensure that our solutions could be easily passed on to manufacturing later. Given our familiarity with wearable/IoT hardware, BLE peripherals, ultra-low-power designs along with our suggestion ability on DFM and scalable manufacturing, we believe we bring everything you are searching for to this project. Our client-oriented approach emphasizes maintaining clear communication throughout the process, providing detailed deliverables (BOM, schematic) as well as reliable prototype support to va Thanks!
$750 USD trong 5 ngày
8,3
8,3

With a specialized set of skills in electrical engineering and embedded systems, I'm well-poised to help you design and engineer the electronics for your phone case with an integrated drawer. I come armed with experience in **sensing approaches** space, allowing me to recommend and design around the most fitting approach for detecting drawer open/close, ensuring **precision, accuracy, and reliability**, with no false triggers. What sets me apart from other candidates is my proficiency in choosing the right components and creating a comprehensive electronics design, with expertise in microcontrollers (specifically low-power ones), BLE connectivity, dealing with sensors, battery+charging solutions, LED indicators, and optimization. With this project, my aim would be to provide you not just the schematic and BOM but a truly manufacturable product ready for hand-off to manufacturing.
$750 USD trong 7 ngày
8,2
8,2

As an experienced electrical engineer, I have specialized in several fields that directly align with your project's requirements. With a strong background in digital motor control and power electronics, I am well-versed in achieving accurate and repeatable results - which is absolutely crucial for your project to eliminate any false opens of the drawer. Furthermore, my expertise in analog design ensures the smooth integration of a low-power microcontroller in your phone case to monitor the drawer activity, without interfering with the form factor or phone usage. In relation to your needs, my PCB design skills are particularly valuable as I have a comprehensive understanding of both Altium and Easyeda software platforms. This enables me to meticulously provide you with a compact, manufacturable layout that satisfies tight form factors without compromising on signal stability or interference during drawer motion or phone use. Beyond this, I offer a wealth of experience in embedded systems and microcontrollers including BLE peripherals which resonate with your 'Nice to have' list for IoT hardware.
$250 USD trong 10 ngày
7,4
7,4

Hello, I’m an embedded hardware and firmware engineer experienced in ultra-low-power BLE devices and compact IoT form factors. I’ve designed wearable-class PCBs with tight mechanical constraints and multi-week battery life targets. For reliable drawer detection, I recommend a **Hall-effect sensor + embedded magnet** approach. It is solid-state (no mechanical wear), highly repeatable, and far more immune to vibration and pocket movement than a microswitch. With proper magnetic threshold tuning and firmware debounce + state validation, false opens can be eliminated. Architecture proposal: • Ultra-low-power BLE SoC (nRF52-class or equivalent) • Interrupt-driven Hall sensor • Micro Li-Po + efficient charger IC (or ultra-thin rechargeable coin cell if space-critical) • Event-driven LED indicator • Deep sleep <10–20 µA with wake-on-interrupt Deliverables include schematic, compact manufacturable PCB layout, JLC-ready BOM, documented firmware (BLE event + timestamp), power budget analysis, and mechanical placement guidance. I will also support prototype validation to ensure stable detection and zero false triggers in real-world conditions. Regards, Engr Muhammad Usman
$500 USD trong 7 ngày
6,6
6,6

Hello, I’m Muhammad Awais. I will design the electronics, sensor, BLE firmware, and power plan to make your phone case drawer detect reliably and report events to your app. I’ll evaluate sensing options (magnetic reed, Hall, microswitch, optical) to fit the tight case constraints and choose a low-power microcontroller with BLE, plus the right sensor(s), battery/charging solution, and an optional subtle LED. I’ll deliver a compact, manufacturable schematic, BOM, and PCB layout, along with firmware that broadcasts drawer state with a timestamp and strong power optimization (sleep modes and wake/on debounce). I’ll add clear assembly guidance and wiring instructions to fit your existing shell, and provide prototype support to validate debounce, false triggers, and signal stability. The plan will be practical for daily use and scalable for manufacturingso you can hand it off with confidence. What is the ideal target battery life per day and the acceptable maximum size for the power unit?
$750 USD trong 21 ngày
6,0
6,0

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.
$500 USD trong 7 ngày
6,1
6,1

Hello, I am a Mechatronics engineer with skills in electronics, IoT, design for manufacturing, embedded systems and prototyping. I can design and build a fully functional casing here, then ship it to you. I have designed and built numerous similar products, some offering long-range coded PHY BLE, WiFi and some with power factor constraints. Please message me for more discussions.
$500 USD trong 7 ngày
4,6
4,6

Hi, I’m an experienced embedded and low-power IoT hardware engineer, and I can design a compact, manufacturable electronics + firmware solution that reliably detects drawer open/close events and communicates them to your existing phone app with robust BLE integration. I will first evaluate mechanical constraints and recommend the most reliable sensing method (likely a low-profile Hall sensor with magnet for contactless durability, or a precision microswitch if space permits), ensuring zero false triggers in pockets through hardware filtering, debounce logic, and state validation algorithms. The electronics will center around an ultra-low-power MCU with integrated BLE (such as Nordic nRF52 class), optimized sleep architecture, efficient battery + charging IC selection, optional subtle LED indication, and a tightly packed PCB layout designed specifically to fit your case geometry without affecting drawer motion. Deliverables include complete schematic, optimized BOM, compact PCB layout ready for manufacturing, production-quality firmware broadcasting BLE drawer events with timestamps, power-consumption analysis with projected battery life, and detailed mechanical placement + assembly guidance. I will also support prototype validation—reviewing real-world test data to refine debounce timing, RF stability, and power behavior—while providing DFM recommendations to ensure the design transitions smoothly into scalable production. Best regards. Jared
$700 USD trong 7 ngày
4,7
4,7

Best Low-Power Electronics BLE Control Expert ⭐⭐⭐⭐⭐ Hi, Thank you for posting your project, “Phone Case Electronics.” I’ve reviewed your requirements and can help you transform your existing mechanical phone case design into a reliable, compact, and production-ready electronic system capable of accurately detecting drawer open/close events and transmitting them to your mobile app. I bring 11+ years of experience in low-power embedded electronics, BLE-based device design, sensor integration, and compact PCB development for consumer and IoT products. I’ve worked extensively on ultra-low-power architectures, battery-powered devices, tight mechanical constraints, and reliable event detection—ensuring robustness, manufacturability, and real-world usability. ✅ How I’ll Help You Succeed 1. Design a complete low-power electronics architecture, including MCU + BLE, sensors, power management, battery/charging, and optional LED indication. 2. Deliver compact, manufacturable schematics, optimized BOM, and PCB layout tailored to your existing case shell. ✅ Before I start, one quick question: do you want me to first focus on sensor selection and system architecture validation, or proceed directly with full electronics design and BLE-based event transmission based on your current case constraints? If you share that, feel free to message me, and we can align quickly. Best regards, Prat PCB Must Innovations
$500 USD trong 2 ngày
6,5
6,5

HI 25 years’ experience | Solution: I will design your phone case electronics integration with precise 3D layout, component placement, and wiring logic—ensuring fit, functionality, and manufacturability. ✅ Solution: Clean, optimized schematic and 3D CAD model showing electronics positions, mounting points, and access interfaces tailored to your design. Questions: 1️⃣ What electronics components, connectors, and sensors must be housed inside the case? 2️⃣ Do you have a particular phone model/dimensions and connector type to fit? 3️⃣ What file formats and deliverables do you require (STEP, STL, exploded views)? We will work as per Freelancer.com’s terms and policies. Warm regards, The Blend Nation
$255 USD trong 1 ngày
4,6
4,6

✅Okay, I got what you want exactly. I am a senior embedded systems and BLE hardware engineer with over 10 years of experience, providing ultra-low-power IoT device design, custom PCB development, firmware architecture, and DFM-ready hardware solutions. In my opinion, the most reliable approach here is to use a precision Hall-effect sensor paired with a small neodymium magnet integrated into the drawer, combined with intelligent firmware filtering to eliminate false triggers from pocket movement. I would design around a Nordic nRF52-class MCU with BLE, optimize deep sleep current to the microamp range, and implement timestamped event broadcasting with connectionless advertising for maximum battery life and reliability. This project is very similar to my previous works. I recently built a BLE-enabled pill dispenser module (32mm x 18mm PCB) using an nRF52832, magnetic position sensing, and a 110mAh LiPo with onboard charging—achieving 6+ months of standby life at <8µA sleep current. I also designed a compact asset-tracking tag with drawer/door detection using dual-sensor validation logic to eliminate vibration-based false positives in bags and vehicles. Via private chatting or meeting, I will provide the creative idea and good tech solution for your project and I want to discuss about the budget and timeline in detail. Best regards. Yaroslav
$500 USD trong 7 ngày
4,1
4,1

With extensive expertise in electronics design and RF engineering coupled with a strong focus on practical, manufacturable designs, I'm confident I can deliver a solution that exceeds your expectations for the phone case electronics project. My skills align perfectly with the key requirements you've listed- accuracy, repeatability, managing tight form factors without compromising function, and low-power optimization are paramount in my work. I've developed a range of wearable/IoT devices and have hands-on experience designing for BLE peripherals, ultra-low-power systems like what you're after here. This means I know how to deliver on battery life without sacrificing performance, essential for ensuring your phone case is practical for daily use. Furthermore, my familiarity with which methodologies scale well in manufacturing is crucial in ensuring a seamless transition from prototype to production. The clear deliverables I will provide, including schematic BOMs and PCB layouts, assembly guidance etc., will be more than sufficient to pass onto manufacturers - saving you time and effort. I'd appreciate the opportunity to bring my talents to your team for this project!
$500 USD trong 2 ngày
3,4
3,4

My name is "Usama Safdar" and I am a Ph.D degree holder which means I am highly-capable to tackle this project "Content Editor " with 100 percent accuracy. I am a professional writer with over 6 years of experience in writing; Essays, Research Summaries, Thesis, Dissertation, Lab Reports and Case Studies. I always provide High-Quality Solutions within the shortest possible time with all instructions followed against very reasonable prices. I can manage works even with shortest deadlines like; "2500 words work in just 6 Hours" with very reasonable time. As a pro academic writer I am also familiar with all the referencing styles; such as APA, Harvard, OSCOLA, IEE, MLA etc. I always provide plagiarism-free solutions and as a prove I also provide "FREE Turnitin reports". For Samples, please visit my profile https://www.freelancer.com/u/SolutionMart Please message me to start the discussion. Thank You
$250 USD trong 1 ngày
3,5
3,5

Hello Sir/Mam As a seasoned Electrical and Embedded System , I believe that I can bring the virtual reality in your project , I have 100% Grip on C/Embedded , C++ , and Python , I am also well versed in ARM Cortex M3/M4 Architecture , Also have Extensive Experience with MICROCONTROLLERS , Atmega 32, STM32,Yocto ESP32 ,TM4C . I have a great Grip on ARDUINO , MATLAB , PCB LAYOUT and IOT Applications . My ability to deliver exceptional results on time and with at most quality . Please come on chat to discuss more about project. I will be waiting for your response. Thank you !
$251 USD trong 3 ngày
2,9
2,9

Hello there! What are the exact internal space constraints (max PCB dimensions, available thickness, and battery cavity size) inside your current case shell? I will start by evaluating the mechanical constraints of your existing drawer geometry and propose the most robust sensing method—likely a low-profile Hall-effect sensor paired with a micro-magnet for reliable, non-contact detection with strong resistance to pocket/bag false triggers, though I’ll validate against microswitch and optical options based on your tolerances and drawer travel distance. From there, I’ll design a compact, manufacturable PCB integrating an ultra-low-power MCU with BLE (such as Nordic nRF52-class or comparable), optimized firmware that timestamps and broadcasts drawer open/close events with debounce logic and signal validation filtering, and a power system built around a small LiPo with charge management and deep-sleep optimization to achieve practical daily-use battery life. I’ll provide a complete schematic, BOM with sourcing notes, 2-layer PCB layout optimized for tight form factors and antenna integrity, firmware with low-energy advertising strategy, and detailed assembly guidance showing exact sensor placement, magnet alignment, wiring paths, and enclosure fitment so it’s production-ready; do you have a preferred BLE profile or existing GATT structure in your app that I should match from the beginning?
$750 USD trong 8 ngày
2,4
2,4

Hello taruns982, ⭐️⭐️⭐️I'll do my best.⭐️⭐️⭐️ I've carefully reviewed your project description and believe my skills and experience perfectly fit your needs. I have over 10 years of experience in the Electronics, Microcontroller, Electrical Engineering, PCB Layout, Bluetooth Low Energy (BLE), DFM (Design for Manufacturing), Embedded Systems, PCB Design and Layout, Signal Processing, Prototype Design field and am highly skilled at delivering high-quality results. Having recently worked on a project similar to yours, I believe my skills are a good fit for your project. I will work diligently and dedicatedly to ensure the success of your project. Please contact us via chat for a more detailed consultation. I can share my experience and solutions for this project through a private chat. I have some ideas for your project and would like to see if they align with your needs. Thank You Roman
$300 USD trong 7 ngày
0,0
0,0

Hi, I’ve worked on projects like this before, so what you’re describing makes sense to me. And I'm really interested in this project - Phone Case Electronics. I usually focus on getting things done cleanly and making sure they work properly in real use, not just on paper. I’m comfortable either improving an existing setup or helping build something new, depending on what stage you’re at. I keep communication straightforward, share progress along the way, and flag issues early so there are no surprises later. If you want, you can share a bit more about the current setup or the goal you’re trying to reach, and I can let you know how I’d approach it. Thanks, Jesse
$500 USD trong 7 ngày
0,0
0,0

Hi, there. I can confidently say, "I can do it perfectly." I don't think a long explanation is necessary. With my solid experience in Electronics, Microcontroller, Electrical Engineering, PCB Layout, Bluetooth Low Energy (BLE), DFM (Design for Manufacturing), Embedded Systems, PCB Design and Layout, Signal Processing, Prototype Design, I will do my best until you are completely satisfied with the final result. I look forward to working with you. Thank you for your time and review. Boris.
$350 USD trong 5 ngày
0,0
0,0

Hello, This is mainly a reliability problem inside a harsh environment (movement, vibration, pocket pressure). I’d start by selecting the sensing method based on tolerance and false-trigger resistance — typically a Hall sensor with magnet calibration works best in tight enclosures — then design an ultra-low-power BLE board around it. The firmware would send debounced open/close events with timestamps, sleep most of the time, and wake only on state change so battery life stays practical. I’ll also size the PCB to your shell, document placement, and include manufacturing-ready schematic, BOM and layout so you can hand it off without redesign later. You can review my embedded/technical work here: https://www.freelancer.com/u/proggon Share photos or dimensions of the case interior and I’ll recommend the exact sensing approach before schematic work. Best regards, Wahaj
$300 USD trong 24 ngày
0,0
0,0

Hi, I can design and prototype the complete electronics + firmware for your phone-case drawer system, ensuring highly reliable open/close detection with zero false triggers in pockets/bags. I will recommend the best sensing approach (typically Hall sensor + magnet for the most repeatable and vibration-resistant detection), then design a compact low-power BLE MCU solution (nRF52 / ESP32-C3 depending on size and battery goals) with battery + charging circuit, optional subtle LED, and manufacturable PCB layout. I will deliver full schematic, BOM, PCB files, and production-ready outputs, along with firmware that implements debounce/filtering, deep sleep power optimization, and BLE event broadcasting with timestamped drawer events compatible with your existing app. I will also provide clear assembly/placement guidance for the sensor and magnet alignment, plus prototype validation support to tune stability and prevent false open/close detection, including DFM recommendations for scalable manufacturing.
$290 USD trong 7 ngày
0,0
0,0

Bloomington, United States
Phương thức thanh toán đã xác thực
Thành viên từ thg 10 9, 2025
$30-250 USD
$30-250 USD
€250-750 EUR
₹1500-12500 INR
₹2000-3000 INR
€30-250 EUR
£250-750 GBP
$30-250 AUD
₹12500-37500 INR
$25-50 AUD/ giờ
₹1500-12500 INR
$100-150 USD
$1000 USD
€30-250 EUR
€250-750 EUR
₹600-1500 INR
$250-750 USD
$30-250 USD
₹12500-37500 INR
₹12500-37500 INR
$30-250 USD
$30-250 USD