Electronic Design for Smart Luggage Locker

@rfandelectronics

As a highly experienced RF and Electronics engineer, I am no stranger to the demands of complex projects like yours. My extensive skillset covers Circuit Design, Electronic Design, Electronics, Embedded Systems, and PCB Design and Layout - all of which are directly relevant to your needs. I specialize in creating high-frequency, optimized and reliable solutions which exactly matches what you're searching for your Mlock system. My expertise in PCB design utilizes industry-renowned software such as KiCad, Proteus, and Altium designer which will ensure a perfectly organized power and signal connection within the system to guarantee its full functionality. Moreover, I understand that your project requires not only technical know-how but also a strategic problem-solving approach. My experience in providing academic research support further equips me with the capacity to handle any unforeseen challenges. In short, by choosing me you'll be acquiring not just an electronics designer but rather a full-stack partner who can ensure that your Mlock system is well-engineered, performant and practical for real-world applications. So let's bring the vision of your Smart Luggage Locker to life together. If you want top-grade work married amalgamation of theory and practice at affordable prices then I'm unquestionably the best fit for this task. I look forward to discussing more about your project needs, goals, and provisions

@hamzaePCB

Hello, I can develop the 12V UPS/power-path and connecting PCB for your Mlock system in KiCad or Altium. I have hands-on experience with embedded hardware and PCB design, including ESP32-based systems, power-supply sections, MOSFET circuits, multilayer PCB design, grounding, protection, component selection and manufacturing preparation. For the UPS, I would first define and calculate the complete power path before layout: MOSFET/ideal-diode switching, reverse-current blocking, battery charging, deep-discharge protection, fuse/short-circuit protection, connector ratings, trace sizing and thermal losses. Special attention will be given to seamless source transfer so the ESP32/router/CCTV loads remain powered. I can also design the interface PCB with organised power/signal distribution, suitable connectors, protection and serviceable module connections. Deliverables can include complete schematics, PCB source files, Gerbers, BOM with exact MPNs, wiring diagram and the requested calculations/documentation. I can share examples of my previous embedded and power-related PCB work. I’m ready to review your module list and preliminary structure before starting. Best regards, Hamza El Amraoui

@brady9324

As an accomplished Electrical Engineer with a knack for problem-solving, I feel uniquely qualified to meet your needs. My extensive experience in designing electronic systems, including power supply and PCBs, has equipped me with the skills and expertise to transform your preliminary structure into a reliable and manufacturable design. I appreciate that the UPS system for your Smart Luggage Locker (Mlock) requires key features such as reverse-current protection, battery charging, and over-current/short-circuit protection. Trust me to incorporate these elements seamlessly into the design of your project. Moreover, my past work on projects requiring careful power and signal connections makes me an excellent candidate for creating your custom connecting/interface PCB. I possess a keen eye for detail which ensures coherent integration of existing modules and robust protection mechanisms within my designs. Lastly, I believe in efficient communication and being adaptable to project needs, so collaborating through various mediums like CAD files, PDFs, markups won't be a challenge. My goal is to provide you with a professional, coordinated design package that'll make your project stand out in terms of productivity and efficiency. Let's embark on this journey together!

@venplura

Hi there! The real challenge here isn't the individual protection features - it's making them coexist without fighting each other. A low-voltage cutoff and reverse-current protection can conflict during battery depletion, and aggressive over-current sensing can nuisance-trip during legitimate inrush loads like solenoid locks. I'd design this with a sequenced protection hierarchy and soft-switching logic that prioritizes the UPS handoff reliability first, then layers protection around it. That way you get safety margins without compromising the one thing users absolutely need - uninterrupted power to the locking mechanism. I'd also want to understand your mechanical timeline and manufacturing tolerances before finalizing trace routing and connector placement, since field serviceability matters in a locker context. Worth a conversation? Corné

@mohamedl131

Hello, I design embedded hardware end to end, so a 12V DC UPS with a custom interface PCB is a good fit for me. For the UPS, I would use a power-path / ideal-diode approach for near-zero-interruption switching between the 12V supply and the battery, with reverse-current protection, a suitable battery charger, low-voltage cutoff, and over-current / short-circuit protection. It will be sized for your 4A continuous load with margin for higher peaks. For the interface PCB, I will turn your preliminary structure into a clean, manufacturable layout: organized power and signal connectors, proper grounding, fusing/protection, and wide traces rated for the current. Deliverables: schematic, PCB layout, Gerber files, BOM and editable source files, following the requirements in your document. Please share the module list, pinouts and battery type/capacity so I can finalize the component choice. I'm happy to send a short component selection for your approval before starting the layout. Best regards, Mohamed

@onlin666

In China, logistics are very convenient. Nowadays, there are all kinds of parcel lockers. I know the common designs of parcel lockers in China, like SF Express.

@WaddahJanajreh93

Hello, I reviewed the complete project brief. The listed budget appears significantly lower than the requested scope, which includes a complete 12V UPS and battery-charging system, protection circuitry, schematics, PCB layout, BOM, Gerbers, calculations, documentation, and source files. Could you please confirm whether the listed budget is intended only for an initial consultation and requirements review, or for the complete project? I also need clarification regarding the battery-charging architecture. The document specifies a 12V DC SMPS and a 12V VRLA battery, but it does not specify the charging source or charging voltage. A nominal 12V VRLA battery normally requires a charging voltage above 12V, according to the selected battery datasheet. Will a higher-voltage supply or a separate charger be available, or should the UPS design include a boost-based battery charger? After reviewing the complete module list, dimensions, pinouts, battery datasheet, and preliminary architecture, I can provide an accurate quotation and delivery schedule.

@parvaizb

I have experience in PCB design, embedded systems, circuit development, firmware, and hardware-software integration. My background includes creating reliable electronic solutions, designing custom PCBs, integrating sensors and communication interfaces, and troubleshooting hardware systems. For this smart luggage locker project, I can help convert the existing architecture and preliminary design into a practical PCB solution with organized connections, suitable protection, and reliable power handling. I can support the development of the 12V DC UPS system by focusing on circuit design, power management requirements, battery charging considerations, protection features, and testing preparation. I will carefully review the provided module specifications, pinouts, and dimensions to create a clean and manufacturable design. My goal is to deliver an efficient and dependable electronics solution that meets the project requirements.

@hungn63

Hi there, I have thoroughly reviewed your project brief for the Mlock Smart Luggage Locker. I understand you need a 12V DC UPS system with seamless switching (zero/minimum interruption to prevent ESP32 and Wi-Fi router reboots) and a clean connecting PCB interface. Here is how I plan to approach your requirements: Power-Path & Switching: Use an ideal-diode / P-MOSFET circuit topology rather than mechanical relays to ensure smooth switching (< microseconds) and zero back-feed between the 12V SMPS and the battery. Battery Management & Protection: Design charging, deep-discharge (UVLO), and over-current/fuse protection suitable for a 12V VRLA battery. Thermal & Current Capacity: Design power traces and select switching components with adequate margins to handle 4A continuous and up to 10A peak safely. Connecting PCB: Organize power distribution, star grounding, and connector layout (screw terminals/JST) matching your enclosure dimensions. Deliverables I will provide: Complete Schematic & multi-layer PCB layout (Altium / KiCad). Manufacturing package: Gerber files, Drill files, Pick & Place, and full BOM with manufacturer part numbers. Wiring diagrams and trace/thermal calculations. I am ready to start immediately once you share the preliminary structural file and module pinouts. Looking forward to discussing further!

@paulpham93

Hi, I'm Paul, an electronics designer experienced with embedded IoT, locks, sensors, and battery management. I can deliver full schematics and PCB for your Mlock. My Upwork profile has earned over $300,000 on Upwork with account Paul.P. DevBrix delivers custom hardware and connected products. Examples: https://devbrix.com. Best regards, Paul.

@rahulv510

Hi, I am an Electronics & Embedded Systems engineer with experience in PCB design using KiCad. I have carefully reviewed your requirements for the 12V DC UPS and modular connecting PCB for the Mlock smart luggage locker. I can develop a reliable and manufacturable design including the UPS power path, automatic source switching, battery charging, reverse-current protection, low-voltage protection, over-current/short-circuit protection, and proper power distribution. The deliverables will include: • Complete UPS schematic and design calculations • Complete connecting/interface PCB schematic and PCB layout • Proper connectors, grounding, protection and power routing • BOM with exact component part numbers • Gerber and manufacturing files • KiCad source/project files • Wiring/interconnection diagram • Basic testing and protection considerations I can complete the complete design within 15 days after receiving the required module datasheets, pinouts, dimensions and preliminary design information. I will also maintain regular communication throughout the project and make necessary design revisions based on your feedback. I look forward to working with you on the Mlock project. Best regards, Rahul Vasava

@ostronik

Hi, Greetings from OSTronik India! We are a technology-driven company specializing in Power Electronics and Embedded System Design integrated with Artificial Intelligence (AI) and Mobile Application Development, delivering reliable, industrial-grade electronic and software solutions—from concept to mass production, all under one roof. Our in-house capabilities include R&D, Firmware Development, Hardware Design, Mobile Application(Android & iOS), Prototyping, and Scalable Mass Production, with a strong focus on quality, performance, and cost efficiency. Core Expertise: • Microcontrollers: PIC, STM32, ESP Family, AVR. • Microprocessors: Raspberry Pi • Development Tools: MPLAB X IDE, STM32CubeIDE, Arduino IDE, Atmel Studio, VS Code • Hardware Design: Industrial-grade multilayer PCBs using Altium Designer with optimized power design, isolation handling, and EMI/EMC compliance • Communication Protocols: UART, SPI, I²C, CAN, Modbus, MQTT, LAN, S-Bus, RS-485 Mobile Application Capabilities: • Custom Android & iOS mobile applications for device control, monitoring, and data visualization • Real-time dashboards, cloud connectivity, and secure user authentication • Seamless integration between IoT platforms and mobile apps We have successfully transformed multiple concepts into market-ready electronic and mobile-enabled solutions. We would be glad to share a brief reference video. Let’s schedule a meeting to discuss your requirements in detail. Best Regards, Team OSTronik India

@abhionlinetutor

I can convert your module list and preliminary structure into a clean, manufacturable KiCad design for the 12 V Mlock system. I will cover source/battery changeover, reverse-current protection, battery charging interface, low-voltage and over-current/short-circuit protection, connector pinouts, grounding, and trace-width checks for the approximately 4 A load. I will keep the power and signal sections clearly separated, run ERC/DRC, document key design assumptions, and provide the schematic, PCB layout, fabrication outputs, and a concise handoff note. Before finalizing the charger and protection parts, I will verify the battery chemistry, input range, peak current, and module pinouts from your brief so the design is safe and practical.

@OWAIS14325

As an experienced Engineering Manager with a proven track record in developing and delivering complex projects, I possess the multifaceted skillset necessary to elevate your Smart Luggage Locker to its full potential. My expertise in Embedded Systems and PCB Design encompasses everything from selecting the right microcontrollers, such as the STM32, ESP32, nRF52840, and AVR, to implementing robust PCB layouts through tools like KiCad and Altium. I also offer rigorous proficiency in developing reliable power solutions like the 12V DC UPS system you require - designing it with minimal interruption and fortified against reverse-current hazards, low-voltage or overcurrent issues, while incorporating safe margin for high current scenarios. Not only will I provide a secure interface for your system components through my expertise in designing custom connecting/interface PCBs but I will also ensure excellent power delivery/subjection and signal integrity. Furthermore, my promotional experience being demonstrated via hardware implementation projects ranging from wearables to flight controllers makes me an ideal candidate for this task. Being adept at managing multiple projects simultaneously without compromising quality means I can readily provide timely yet highly professional work - transforming your preliminary design into a proper manufacturable one within the given parameters. ết

@HeyAbhinav

VRLA battery is a legacy, but I'd suggest LiFePO4 battery for your purpose. For PCB, we'll do a 4-layer stack with 2 oz power pours calculated for 10A current and minimal heat rise. As you already mentioned - I appreciate that, We shall use ideal-diodes with a way that guarantees zero reboots for your existing hardware. I've gone through your attached document and we can have an initial discussion anytime you prefer.