Hire the Best Hardware Prototyping Specialists in California

I'm a biomedical engineer with a variety of skills spanning electronics, 3D printing, and CAD. I'm looking to help individuals with their initial prototypes so that they can take ideas to the next level.

Hello and welcome to your successful journey of technological innovation. I am Leonard, your technical sherpa, guiding you through the complex landscape of electronic engineering and product creation. With four decades of experience in creating assembly and manufacturing drawings for printed circuit board assemblies (PCBAs), wiring diagrams, cable assembly drawings, and product assembly, we are your expert partners in turning visionary ideas into tangible success. Our Expertise: We specialize in quick turnaround prototyping for complex projects, excelling in streamlined processes developed over years. Our forte lies in the miniaturization of circuitry, recently integrating a medical-grade System-on-Module (SoM) 8-channel EEG into a compact 1” sq design, preparing for manufacturing. Technical Proficiency: Our expertise spans across a vast array of skills and technologies, including schematic design, PCB layout, manual flying-probe testing, and hand-assembling and rework of prototypes. We excel in embedded firmware development, bootloader management, microcontroller RTOSs, and on-board communications. Our design for manufacturing (DFM) capabilities ensure compliance with FCC, CE, UL, and FDA standards. Innovation and Intellectual Property: We are pioneers in wireless technology, satellite communications, power management, OTA updating, edge computing, digital signal processing, and AI machine learning. Our commitment to innovation is demonstrated through our active involvement in patent creation and evaluation, ensuring our solutions are not only effective but also protected. Invitation to Connect: We invite you to explore our portfolio and consider how our expertise can transform your project ideas into reality. Let’s embark on a conversation, be it through phone or Zoom, to discuss how we can facilitate your journey to success Thank you for considering us as your partner in innovation. Best regards, Leonard

As a dedicated freelance electrical engineer, I specialize in high-density PCB design and radio frequency (RF) technology, bringing reliable and efficient solutions to each project. Experienced in utilizing both Altium and KiCad for intricate design layouts, I also harness my skills in embedded programming to develop complex and responsive electronic systems. With a strong educational background and practical proficiency, I strive to consistently produce quality work and provide innovative solutions in the field of electrical engineering.

I am a senior electronics and embedded systems engineer with 47 years of experience in hardware design, firmware development, PCB layout, debugging, testing, and product development. I help clients turn electronic product ideas, prototypes, and hand-wired circuits into working embedded systems and manufacturable PCB designs. Typical projects I can help with include: * ESP32 and STM32 / STMicroelectronics MCU-based products * Power conversion and low-power battery-powered product design * Custom wireless and RF communications, including LoRa and ESP-NOW peer-to-peer networking * Circuit design and component selection for manufacturing * Schematic entry and multi-layer PCB design. * Ordering fabs and coordinating assembled boards. * C/C++ firmware for sensors, displays, audio, wireless, and control systems * Embedded graphics and touchscreen user interfaces using LVGL * Digital audio filtering, FFT spectrum analysis, and voice activity detection * Cloud API integration for speech-to-text, text-to-speech, and language translation * Embedded bus and peripheral interfaces: I2C, SPI, I2S, UART, RS-485, CAN, and SD/MMC * Prototype debugging and board bring-up * Converting breadboard prototypes into clean PCB designs * Design reviews before manufacturing * Analog and digital circuit troubleshooting * Production-oriented improvements for reliability and manufacturability I have founded and managed engineering companies and consulting firms, led technical teams, and helped bring electronic products from initial concept through prototype, testing, manufacturing, and production. For clients, this means fewer design mistakes, faster debugging, lower development risk, and a clearer path from concept to a working, manufacturable product.

Versatile engineer focused on electronics and product design, with strong emphasis on high-complexity printed circuit board designs and a focus on design for manufacturability. I design, build, program, and test prototypes with in-house tools. I have served a wide variety of industries and have developed initial concepts and prototype devices as well as producing products that go into full scale production manufacturing. I work with clients and testing services to bring their product through regulatory and safety compliance testing and certification. Extensive design experience on Altium Designer, including detailed layout incorporating 3D CAD models. Certified IPC Designer Council PCB Designer (CID). Whether developing a brand new idea at early concept stages, developing or refining prototypes to validate the product, or taking the product into manufacturing and production, I enjoy providing you with solutions that are suitably for your needs. I am a graduate of the California Institute of Technology (Caltech), with a B.S. in Engineering and Applied Sciences. I am located in the Pasadena / Los Angeles-area. I am a U.S. Citizen and am available for travel domestically and internationally. Key offerings: • System analysis and design, including key technical and market considerations for success • Electronics design and printed circuit board (PCB) layout (Altium) • Mechanical CAD work to supplement the electronics, including sheet metal work (Alibre) • Develop bare-metal firmware and embedded-OS software • Assemble, build and test prototypes • Process regulatory and safety testing and certification • Manage product manufacturing and logistics • Perform design reviews to identify problems and recommend improvements • Troubleshoot and fix failed devices, including repair of circuit boards I can use many formats of customer-supplied data from other electronics design software, and mechanical data from Solidworks and other standard CAD data formats. I have developed a wide variety of circuit boards, including: • Standard 2- and 4-layer boards with surface mount and through-hole components • Custom spec boards (e.g. high layer counts, blind/buried vias, HDI) • High-speed / high-density boards with length-matching and tuning, controlled impedance • Circuit boards with complex mechanical dimensional requirements • Flex, rigid-flex, and semi-flex board assemblies with features on multiple work planes • Products incorporating Bluetooth, BLE, WiFi, and serial interfaces (SPI, I2C, LIN, RS-232, RS-485) I design, assemble and test prototype electronics with in-house equipment. For volume production, I can arrange turn-key manufacturing for you. Partial list of equipment: • SMD assembly and rework prototyping tools • CNC PCB milling system • SMD Pick-and-place for short-run PCB assembly (over 3,000 CPH) • 3-axis CNC mill for enclosure / custom metal fabrication • Multiple 3D Printers. Print volumes up to 14" x 14" x 12.6" (355 x 355 x 320 mm) • 4-Channel 500 MHz digital storage oscilloscope, • 34-channel 500 MSPS logic capture/analyzer • Thermal imaging camera • Metrology grade 3D scanner Please feel free to challenge me with your tough projects!

I am a tool maker and a problem solver. I have deep experience working with software including massive distributed systems and microscale IoT devices. I enjoy designing and building complex electro-mechanical systems and developing easy to use interfaces. I'm excellent at hardware design, software design, fabrication, development, testing, and delivery. I have good communication skills and strive to create simple effective robust solutions.