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I am looking for an experienced PCB Designer/Hardware Engineer to design a custom power management board for a BLDC fan system with integrated battery backup. Key Functional Requirements: Battery System: 4S LiFePO4 (32140 cells, 3.2V nominal). Must include integrated BMS (B-, B1, B2, B3, B+) and a CC/CV charging circuit. AC Sensing: Use an Optocoupler (e.g., PC817) to sense 220V AC mains from a wall switch. Automatic Transfer (ATS): When 220V is present, the fan runs on mains and the battery charges. Upon AC failure (while the wall switch is ON), the board must automatically flip a relay to the internal 12V-to-220V inverter. Terminals: 4-terminal AC block (2 for 220V Input, 2 for Fan Output) + Battery connections. Inverter Logic: The inverter should stay in "Standby" until triggered by AC loss. Deliverables: Complete Schematic and PCB Layout (Gerber, BOM, and Pick-and-Place files). Component selection for high-voltage isolation (Creepage/Clearance standards). Thermal management strategy for the inverter MOSFETs. Required Skills: Power Electronics, AC-DC/DC-AC Conversion, LiFePO4 Charging, KiCad/Altium/EasyEDA.
Project ID: 40334706
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9 freelancers are bidding on average ₹1,794 INR for this job

I am a skilled and reliable Embedded Systems Engineer with over 6 years of hands-on experience in Arduino, ESP32/ESP8266, and microcontroller-based development. I specialize in designing efficient, stable, and scalable embedded solutions, turning ideas into fully functional hardware-software systems. I have a strong background in electronics, sensors, communication protocols (UART, I2C, SPI, MQTT, WiFi, BLE), and real-time embedded systems. My development approach focuses on clean, well-structured, and well-documented firmware, ensuring long-term reliability and easy maintenance. I also provide thorough testing, debugging, and performance optimization, including power efficiency improvements where required. I am a detail-oriented engineer with strong problem-solving skills and extensive experience in hardware debugging and firmware optimization. Beyond technical expertise, I value clear communication, meeting deadlines, and maintaining high client satisfaction. I work closely with clients to fully understand project requirements and deliver high-quality results. Pricing is flexible and can be discussed based on project scope and complexity. I am open to both short-term and long-term projects. Let’s work together to build a professional, reliable, and efficient embedded system for your needs.
₹6,000 INR in 7 days
7.4
7.4

Experienced PCB Designer & Hardware Engineer here. I can design your BLDC fan power management board with 4S LiFePO4 BMS, CC/CV charging, AC sensing (PC817), and seamless ATS with inverter control. I’ll deliver a complete schematic, PCB (Gerber, BOM, PnP), ensuring proper isolation, safety, and thermal design. Ready to start.
₹1,500 INR in 7 days
4.0
4.0

Hi there, I can design your BLDC fan power board with 4S LiFePO4 BMS, CC/CV charging, AC sensing, and automatic transfer to inverter. I specialize in power electronics and have experience with battery systems and high-voltage isolation design. I use LTspice for validation and EasyEDA for PCB design, delivering production-ready files (Gerbers, BOM, and PnP). Best regards, Michael.
₹1,500 INR in 7 days
2.5
2.5

I have experience with designing BLDC driver circuits and DC-DC converters I have a fully functional bldc circuit readyly available with me Do message me to discuss some more details of this project
₹1,050 INR in 7 days
0.0
0.0

I am good at creating this kind of power management system. I am working for like a year in pcb design company.
₹2,000 INR in 7 days
0.0
0.0

Hello, This project matches my experience in PCB design and power electronics. I can design the full schematic and PCB (Gerber, BOM, PnP) with proper isolation, relay-based ATS logic, and safe LiFePO4 integration. I focus on reliable, manufacturable designs — especially for AC-related systems. Quick question before starting: Do you want a full inverter design or integration of an existing module? I can start immediately and deliver a clean first revision quickly. Best regards
₹1,200 INR in 7 days
0.0
0.0

I am Electronics and Communication Engineer with quite a lot of projects in PCB Designing. i have also worked at ISRO in the past.
₹800 INR in 7 days
0.0
0.0

Designed and developed GaN driver boards using IGCSS01, 1EDN series drivers with STM32H7 control Strong experience in STM32 (H7 series): SPI, ADC, real-time control loops Worked on industrial communication interfaces (SPI-based Ethernet – LAN9252, low-level protocol handling) Expertise in power electronics design: gate drivers, switching circuits, protection and layout optimization Proficient in KiCad, LTspice for schematic design, simulation, and PCB layout Solid understanding of signal integrity, high-speed routing, and EMI considerations Experience with RTOS concepts and low-level embedded architecture
₹1,050 INR in 7 days
0.0
0.0

Hi, Thank you for sharing the detailed requirements. I have reviewed the project specifications for the BLDC fan power management board. I have extensive experience in PCB design, specifically with power electronics and battery management systems. I can certainly handle the 4S LiFePO4 charging circuit, the AC sensing logic with PC817, and the automatic relay switching for the inverter. I will ensure the design follows strict creepage and clearance standards for 220V isolation and implement an effective thermal strategy for the MOSFETs. I typically work with EasyEDA for design and can provide all the deliverables, including Gerber, BOM, and Pick-and-Place files. I am ready to start this project immediately. Let me know if you’d like to discuss any specific components before I begin the schematic
₹1,050 INR in 7 days
0.1
0.1

Mumbai, India
Member since Dec 16, 2019
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