PCB Design + Fabrication for Compact Ultrasonic Audio Privacy Device (2-Channel, Battery Powered)

@amelectronics

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.

@Adeel2k14

Hello, I am an Electrical Engineer with 7+ years of experience in PCB design and currently working as an Embedded System Design Engineer in a reputed firm. I have designed up to 8-layer PCBs including mixed-signal, high-speed digital, power converters, and analog circuits. I can handle your 2-layer PCB layout, ensure proper EMI control, power routing, and deliver fabrication-ready files with assembly support. I also have firmware experience, which helps in better system understanding. I can work with JLCPCB/PCBWay and assist in sourcing and assembly. Looking forward to working with you.

@tshibsamuel477

Hi there, I carefully read your project, and I can help you complete the PCB layout, fabrication, and assembly for your ultrasonic jammer demo unit . Since your schematic, BOM, and firmware are already ready, I can move quickly to deliver a clean, manufacturable 2-layer PCB with proper power routing, EMI control, and reliable layout for the ultrasonic stage. I’m Samuel Tshibangu, a mechatronics engineer with strong experience in PCB design, mixed-signal systems, power electronics, and compact layouts using Altium and KiCad. I’ve already worked with similar architectures (MCU + DDS + driver + MOSFET + resonant loads), so I can ensure correct routing, grounding, and performance while keeping the board compact and production-ready. I can deliver the full package: schematic integration (if needed), PCB layout, Gerbers, BOM with sourcing, pick-and-place, 3D renders, and support for fabrication/assembly. I also pay close attention to layout rules like decoupling placement, star grounding, EMI separation, and high-current routing as required in your spec. I’m confident I can complete this efficiently and professionally. Feel free to send me a message. Best regards, Samuel Tshibangu

@Mahmoud00Ibrahim

Hi, I reviewed your ultrasonic jammer project carefully, and I can handle the full PCB design, fabrication, and assembly for a clean, compact, and reliable demo unit. I have solid experience in 2-layer PCB design, mixed-signal layouts, and power electronics, so I’ll ensure proper separation between the DDS (AD9833), ESP32-C3, and the high-power MOSFET stage to minimize noise and interference. For your design, I will focus on: * Clean 2-layer layout with solid ground plane and star grounding * Proper high-current routing (≥1mm) for MOSFET and 12V paths * Tight decoupling placement (especially TC4420) * Careful EMI handling between coils and signal section * Compact placement within your 80×50 mm constraint * Clean silkscreen, test points, and assembly-friendly layout Deliverables include: * Full KiCad project (schematic + PCB) * Gerber + drill + pick & place files * BOM with sourcing (LCSC / DigiKey / Mouser / Robu if needed) * 3D renders of the final board * Support for fabrication via JLCPCB / PCBWay

@shadabkhan92

With over a decade of experience in circuit design and electronics, I am confident in my ability to successfully execute your project. Not only have I worked on similar projects before, but I also have hands-on experience in PCB layout with platforms such as KiCad and Altium - exactly what you're looking for. My skills extend beyond the theoretical; I am proficient with soldering, assembly and testing making me a complete package. I understand that your project requires a delicate balance between both hardware and software, which is precisely where my expertise thrives. Alongside DBS and ESP32-C3 firmware skills mentioned in your project description, my competency extends across a wide range including MQTT-connected sensor networks. This makes me well-suited to manage your compact ultrasonic device that cuts eavesdropping from nearby phones. In summary, do give me the opportunity to make your desired device by leveraging my solid understanding of circuits, electrical engineering, embedded systems, and skill working within prescribed guidelines. I envision an exceptional result that strictly follows the schematic while keeping every element within the outlined size dimensions and trace widths needed for optimal function. Looking forward to collaborating with you!

@ahmedy607

Hi, I can take your provided schematic, netlist, and BOM and deliver a clean, production-ready 2-layer PCB along with PCBA support. I’ll focus on a robust layout with proper power routing (5V / boosted 12V), solid grounding (star ground + separation for analog/digital), and EMI-aware placement—keeping coils and high-current paths isolated from the AD9833 and control section. Critical constraints like TC4420 decoupling, wide power traces, and transducer placement will be strictly followed. Deliverables will include full KiCad/Altium files, Gerbers, drill, pick-and-place, BOM with sourcing (LCSC/DigiKey/alternatives), and 3D renders. I can also handle fabrication and assembly (JLCPCB/PCBWay) and deliver fully assembled boards as specified. Happy to review your files first and confirm details like module footprints and sourcing options. Best regards, Ahmed

@Robertx2002

The real challenge is integrating sensitive analog and high-current power stages onto a compact 2-layer PCB while ensuring minimal EMI and a robust star-ground topology to maintain signal integrity and efficiency. I will deliver a fabrication-ready PCB layout that strictly follows your trace width, component placement, and grounding rules, prioritizing the isolation of inductors and adherence to the 5mm capacitor placement near TC4420’s VDD. The boost converter will be configured for reliable 12V output with a test point included, and the castellated modules will be accommodated with precision footprints ensuring plug-and-play compatibility with the ESP32-C3 and AD9833. I will source components from preferred Indian suppliers to adhere to your timeline and budget, ensuring the 5 assembled boards meet your specifications except for the transducers, which you will add. Deliverables include KiCad files, Gerber, drill, pick-and-place files, BOM with live supplier links, and a 3D render confirming the assembly and mounting hole accuracy. This approach eliminates guesswork and guarantees a demo unit ready on schedule. Are you ready to start the design review within 24 hours to secure the quickest turnaround and direct communication throughout production?

@ThynkLoop

Hi, I can help you convert your existing ultrasonic jammer circuit into a compact, well-optimized PCB and deliver fully assembled boards ready for testing. I have experience in PCB design and embedded hardware, including mixed-signal and power circuits. I will ensure proper layout for signal integrity, power handling, and EMI control, especially for the MOSFET switching and ultrasonic driver section. Scope: *PCB layout based on provided schematic and netlist *Proper placement of ESP32-C3, AD9833, driver, and power modules *Optimized routing for - High-current paths, Gate driver signals and SPI communication *Grounding strategy *Preparation of fabrication and assembly files *Fabrication and assembly of 5 boards Deliverables: *KiCad/Altium project files *Gerber + drill + pick-and-place files *BOM with sourcing links *3D render of PCB *Assembled boards Approach: *Review schematic and constraints *Plan component placement for minimal noise *Route power and signal sections carefully *Ensure EMI isolation between analog and switching sections *Generate manufacturing files and support fabrication *Assemble and test boards I will ensure a clean, reliable, and compact PCB suitable for your demo unit.

@greeshmamodem

I am an embedded systems engineer specializing in IoT and real-time control systems, with strong experience in ESP8266, ESP32, and STM32 microcontrollers. I have hands-on expertise in sensor integration, wireless communication (Wi-Fi, ESP-NOW), and PCB design. In addition, I have designed an in-house flight controller from scratch, including both hardware and firmware development. This involved working with IMU and GNSS modules, implementing PID control algorithms, and developing reliable real-time systems inspired by industry standards such as PX4 and Ardupilot.

@Mwaleed30

Being an Electronic Engineer, Hardware Designer and a skilled PCB Designer with 3 +years of experience I make proper R&D projects Full schematics and real life single layer ,2 layers ,4 layers ,6 layer and multi-layers PCBs projects (i.e: 1:PCB of compact ear buds 2:Pcbs for compact usb with advanced security features 3:Pcbs which involves USBs 4:Also i made many large projects which handles high voltage AC and DC 5: 6 -layers PCB of Arm Cortex Processor involving Programming 6: Programmable Frequency Generator PCB 7: Compact Smart SOS PCB 8: High Volatge Ac to DC Converter with MCU STM32 programmability’s for 10KW system 9: 10KW AC Inverter with output voltage 24V 10: Qi 1.3 Wirless Charger Transmitter and Reciever 11: PCB for agricultural watering system that controls 50 fig trees with expansion capability to 100 trees) 12: Custom IO Board Design for Raspberry Pi CM5 with Integrated RP2040 And many more I have advanced level grip on softawares like Easyeda-Pro ,Kicad, Altium I will show you my PCB work separately I will handle your project and made it perfect in the best cheapest price and do its customisation First see me work then Hire me You can also see my Portfolio which reflects some of my PCBs projects In the end i will assure you that you will get professional level and great quality work in the best price Thankyou

@letswork92

I understand that you require a 2-layer PCB for your ultrasonic audio privacy device, with precise specifications and high-quality fabrication. Given my 12+ years of experience in electronics design and embedded systems, I can ensure a robust layout that meets your requirements. Leveraging tools like KiCad or Altium, I'll carefully design the PCB according to your provided schematic, ensuring optimal signal integrity while adhering to the layout rules you've outlined. The focus on minimizing EMI between components is crucial, especially since this device targets sensitive audio disruption. Additionally, I can assist in sourcing all necessary components efficiently from reliable suppliers like LCSC or DigiKey to expedite the assembly process. Before we proceed, could you clarify if you have any specific preferences for the PCB fabrication house? This will help streamline our workflow for quicker delivery. Looking forward to collaborating on this exciting project!

@khalidk552

i did many conception with simulation and i can sed you many exemple about this i hope to send me about more info

@vasimp78

Hello sir I have a good quality pcb designing and fabrication experience I can solve your problem with my excellent skills of pcb designing if you need you can contact me. Thank you.