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Scott McLeslie's avatar
Scott McLeslie
Melbourne, USA
Robotics, automations. System architecture. PCB design.
$1k+
Earned
1x
Hired
5.0
Rating
6
Followers
Robotics, automations. System architecture. PCB design.
Cover image for From red and blue traces
From red and blue traces on a screen to a fully fabricated PCB - the hardware design process is always exciting. But the greatest reward is seeing the final product in action. Hearing scientists use my boards alongside their high-grade lab equipment makes all the hard work completely worthwhile.
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Cover image for Inline 1 to 2 CAN
Inline 1 to 2 CAN Bus router. Self contained, inline potted router flashed for a specific piece of hardware translating abstracted message to hardware specific messages and signals.
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156
Cover image for Water quality logger for divers
Water quality logger for divers
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231
Cover image for The CANaBUS ADC Carrier is
The CANaBUS ADC Carrier is a specialized ROS2 edge board designed as an Ethernet and UART carrier for the Jrk G2 18v27 USB Motor Controller. Powered by the Teensy 4.1, it provides high-speed processing and seamless integration for closed-loop motor control with feedback. 🛠️ Key Technical Features Controller Interface: Specifically designed to host and communicate with the Jrk G2 18v27 via dedicated UART channels (UART1/UART2) for precise motor commands. Ethernet Connectivity: Integrated RJ45 MagJack (J1B1211CCD) provides native 10/100 Mbps Ethernet for high-reliability ROS2 data streaming. 4-Channel ADC: Features four dedicated analog-to-digital converter channels accessible via Teensy pins, ideal for monitoring real-time sensor feedback or voltage differentials.
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264
Altium Designer(7)
Mickael Urbino's avatar
Mickael Urbino
Belgium
Hardware Engineer | PCB Design | Altium Designer
Hardware Engineer | PCB Design | Altium Designer
Cover image for Video Transmitter
Video Transmitter
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38
Cover image for Drone ESC
Drone ESC
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51
Cover image for HDI PCB for Image Processing
HDI PCB for Image Processing
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50
Cover image for Drone Flight Controller
Drone Flight Controller
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105
Altium Designer(4)
Laavizanah Shawulu's avatar
Laavizanah Shawulu
Nigeria
Ready to turn your Idea into product.
Ready to turn your Idea into product.
Cover image for 24V BLDC Motor Controller with
24V BLDC Motor Controller with Field-Oriented Control (FOC) Designed a custom 24V three-phase BLDC motor controller PCB for precision robotic motion control using Field-Oriented Control (FOC). The project focused on creating a modular, high-performance embedded hardware platform capable of delivering accurate torque, speed, and position control for robotic joints, gimbal systems, and industrial automation applications. Key Features 1) Custom schematic design for a 24V FOC motor controller 2) STM32G431-based embedded control architecture 3) Three-phase MOSFET inverter driven by a DRV8353 gate driver 4) High-resolution magnetic encoder interface (SPI) for closed-loop position feedback 5) Three-phase current sensing using precision shunt resistors and current-sense amplifiers 6) CAN Bus communication for integration into distributed robotic systems 7) Integrated protection circuitry, including reverse-polarity protection, over-current protection, and transient voltage suppression 8) Dedicated SWD programming and debugging interface 9) Optimized power distribution for separate 24V, 5V, and 3.3V domains Project Outcome The design provides a complete hardware platform for implementing advanced FOC algorithms capable of smooth, efficient, and highly accurate BLDC motor control. The architecture is suitable for robotics, precision actuators, autonomous systems, industrial automation, and research applications requiring high-performance motion control.
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Cover image for Real Estate Website I created this
Real Estate Website I created this project to explore how a real estate platform could present properties in a way that feels modern, professional, and easy to navigate. The goal was to design a site that puts the properties at the center while still providing a smooth experience for users searching for a home. I started by structuring the website around the user's journey — from discovering properties through the hero search section, to browsing featured listings, learning about the company, and eventually getting in touch. I focused on creating a clean visual hierarchy, using large property imagery, simple typography, and spacious layouts to give the site a premium feel. The website was developed from scratch using HTML, CSS, and JavaScript. JavaScript was used to add interactive features such as the property search and filtering system, favorite buttons, mobile navigation, and scroll-based animations. CSS media queries were also used to make the layout responsive across desktop, tablet, and mobile screen sizes. Key focus: Responsive Design • UI/UX • Front-End Development • Interactive Components Tools: HTML5 • CSS3 • JavaScript
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Cover image for GridSense — Smart Energy Monitoring
GridSense — Smart Energy Monitoring Dashboard   Project Type: UI Design & Frontend Development Category: EnergyTech / SaaS / IoT Technologies: HTML, CSS, JavaScript, Chart.js   Project Overview GridSense is a smart energy monitoring dashboard concept designed to help households and businesses understand, monitor, and manage their electricity consumption through a centralized, intuitive interface. The platform transforms energy usage data into actionable insights, allowing users to track real-time power consumption, monitor connected appliances, estimate electricity costs, and identify opportunities to improve energy efficiency.   Key Features - Energy Monitoring: View current power consumption, daily energy usage, and estimated monthly electricity costs. - Appliance Management: Monitor connected appliances, view their power ratings, and interact with simulated ON/OFF controls. - Energy Analytics: Explore electricity consumption trends through interactive charts with weekly, monthly, and yearly views. - Energy Efficiency Insights: View an energy efficiency score and identify potential opportunities to reduce consumption. - Smart Alerts: Receive notifications about unusual energy consumption, prolonged appliance usage, and energy savings. - Responsive Interface: Access the dashboard through a modern interface designed to adapt to different screen sizes. - Dark Mode: Switch between light and dark themes for a more personalized viewing experience.   Design Approach The interface combines a clean SaaS dashboard layout with intuitive navigation, data visualization, and clearly structured information. A consistent visual hierarchy, reusable UI components, and a modern design language help users quickly interpret energy data without unnecessary complexity.   Development Built using HTML, CSS, and JavaScript, GridSense incorporates interactive dashboard elements, dynamic appliance power calculations, theme switching, and Chart.js visualizations. The project demonstrates the integration of frontend development and UI design principles to create a practical, data-driven interface for a smart energy management platform.   Project Goal The goal of GridSense is to explore how thoughtful interface design and accessible energy data visualization can make electricity consumption easier to understand, helping users make more informed decisions about their energy usage.
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Cover image for Project: Headphone 3D Modeling & Rendering Project
Project: Headphone 3D Modeling & Rendering Project Overview This project involved designing and developing a 3D model of a pair of headphones using Autodesk Fusion 360. The aim was to create a modern, functional-looking headphone design while exploring 3D modeling, form development, and product visualization. Design Development I began by developing the overall shape and proportions of the headphones, focusing on creating a balanced relationship between the headband, earcups, and supporting components. I used Fusion 360's modeling tools to construct and refine the individual parts before assembling them into a complete product. Modeling Process The model was created using a combination of sketches, extrusions, fillets, and other solid-modeling techniques. Particular attention was given to symmetry, proportions, smooth transitions, and the overall appearance of the product. Rendering & Visualization After completing the 3D model, I produced a rendered view to showcase the final design. The rendering allowed me to present the headphones with realistic materials, lighting, and surface finishes, making the final form easier to visualize. Skills Demonstrated: 3D CAD modeling Product design Autodesk Fusion 360 Assembly and component modeling Surface/form development Rendering and visualization Attention to proportion and detail Final Outcome The final result is a complete 3D headphone model that demonstrates my ability to take a product concept and develop it into a detailed digital model. This project also helped me improve my understanding of CAD workflows and product visualization.  
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102
Altium Designer(1)
simon chen's avatar
simon chen
China
IoT Architect | 15+ Yrs | Prototype to Mass Production
New to Contra
IoT Architect | 15+ Yrs | Prototype to Mass Production
Cover image for ESP8266/ESP32 Industrial-Grade Wireless Serial Port
ESP8266/ESP32 Industrial-Grade Wireless Serial Port Bridge (Wi-Fi/UART) Overview: Developed in 2019 and in mass production for over 7 years, this high-reliability Wireless Serial Port Bridge enables seamless bidirectional transparent transmission between UART and Wi-Fi. It is a mature "wireless cable" solution widely used in industrial automation for remote equipment monitoring and long-distance debugging. ► Skills used: ● Systems architecture ● PCB design (Altium/KiCad) ● ESP8266/ESP32 development(C/C++) ● VUE UI(HTML5/Javascript) ► Key Engineering & Product Features: ● App-Free Browser Interaction: The system utilizes WebSocket for real-time communication. Users don't need to install any apps or drivers; any device with a Web Browser and Wi-Fi can perform long-distance debugging on serial-based hardware. ● Remote Debugging via VPN: While primarily a local wireless bridge, the architecture supports Remote Debugging over a VPN, allowing engineers to troubleshoot any MCU/equipment which having UART/Serial from anywhere in the world. ● Zero-Code Configuration: Built-in Web Server for instant network setup and parameter adjustment without AT commands. ● Rapid Provisioning: Integrated WeChat Airkiss protocol for one-click Wi-Fi configuration via smartphone. ► Industrial Reliability: ● Self-Healing Logic: Hardware watchdog and automated reconnection protocols ensure 24/7 stability in noisy electrical environments. ● Dual Power Interfaces: Supports both USB Type-C (5V) and direct pin-header (5V/GND) inputs for easy integration into existing panels. ● Visual Diagnostics: Dual LED indicators for real-time status monitoring of AP and STA connections. ► Proven Market Longevity: ● Mass-Produced Since 2019: Over 7 years of field-tested reliability in diverse industrial and commercial sectors. This is a battle-hardened solution, not a prototype. This project demonstrates my ability to design long-lifecycle industrial tools. I specialize in creating hardware that is not only powerful but incredibly easy to deploy. By leveraging the Pearl River Delta supply chain, I take mature designs from 2019 and maintain their market relevance through continuous firmware optimization.
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Cover image for Innovative E-Ink Display Board Enhances Digital Solutions
Another new board works with E-ink.
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108
Cover image for ESP32-P4 SOM: Dual-Core AIoT Hub
ESP32-P4 SOM: Dual-Core AIoT Hub with Advanced Multimedia Overview: The ESP32-P4 SOM is a flagship, low-power, cost-effective computing core launched in 2026. Featuring a unique ESP32-P4 + ESP32-C6 dual-chip architecture, it bridges high-performance application processing with advanced WiFi 6 and Bluetooth 5 (LE) connectivity. This "Minimum System" is engineered into a compact 40x30mm footprint, providing a ready-to-use engine for the next generation of smart multimedia devices. ► Skills Used: ● Dual-SoC System Architecture (P4 + C6) ● DFM & Yield Optimization ● EMI/EMC Engineering ● BOM Optimization ● Firmware Development(C/C++). ► "One Board, Triple Mounting Options": Designed for maximum versatility across different development phases and deployment environments: ● Flexible Integration: A single PCBA design supports three mounting configurations: Dual BTB connectors, Single BTB, or LGA (Land Grid Array). This allows developers to switch between easy-to-swap modules for prototyping and low-profile, vibration-resistant mounting for mass production. ● Rapid Development Ecosystem: By routing up to 80 GPIOs to the module interface, clients only need to design a simple 1-4 layer carrier board. This drastically shortens the R&D cycle and reduces hardware validation costs. ● Highly Integrated Design: Despite its small size, the module houses the SoC, PSRAM, Flash, PMIC, and the ESP32-C6 communication co-processor, complete with reserved shielding for superior EMI performance. ► Key Engineering & Product Features: ● Network Versatility: In addition to WiFi 6, the module provides a dedicated Ethernet extension interface, ensuring high-speed and ultra-stable wired connectivity for industrial environments. ● High-Speed Multimedia: Native support for MIPI DSI (Display) and MIPI CSI (Camera), enabling high-definition visual interfaces and real-time image processing. ● Advanced Audio & Storage: Integrated voice input and audio output interfaces for interactive systems, plus high-speed TF card support for localized data storage. ● Connectivity-Rich: Powered by the ESP32-C6 co-processor to provide stable WiFi 6 and BLE connectivity, ensuring the P4 main processor remains dedicated to heavy computational tasks. ● Massive I/O Capability: With 80 GPIOs available, the module can control complex arrays of sensors, actuators, and peripheral devices simultaneously. ► Target Applications & Solutions: ● Smart Security: Advanced Access Control Systems utilizing MIPI camera input and local processing. ● Voice AI: Smart AI Speakers with high-fidelity audio I/O and localized voice recognition capabilities. ● Industrial HMI: Low-cost Human-Machine Interfaces that require fluid graphical displays and low power consumption. This ESP32-P4 SOM represents the pinnacle of "Efficiency Meets Performance." By decoupling the high-speed processing core from the carrier board, I provide a pre-verified, mass-production-ready platform that allows you to deploy complex, multimedia-rich AIoT solutions with unmatched speed and technical confidence.
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Cover image for RK3326s SOM: Modular "Minimum System"
RK3326s SOM: Modular "Minimum System" for Rapid Deployment Overview: The RK3326s SOM is a highly integrated, 6-layer System-on-Module designed to function as a complete, "plug-and-play" computing core. By utilizing a 260-pin DDR4 SO-DIMM interface, this module eliminates the need for secondary reflow soldering—a common cause of defects in LGA-based modules—while enabling rapid assembly and field-swappability for industrial and consumer applications. ► Skills Used: ● High-Speed Systems Architecture. ● PCBA design (Altium/KiCad) ● Linux Kernel/APP development(C/C++) ● DFM & Production Optimization ● EMI/EMC Engineering ● BOM Optimization ► "One Core, Infinite Carrier Boards": The modular design is engineered to slash development cycles and R&D costs for new product categories: ● Full GPIO Breakout: All essential I/Os are routed to the SO-DIMM interface, allowing clients to develop simple 1-4 layer carrier boards for specific projects. ● Elastic Material Compatibility: Pre-engineered to support 10+ WiFi modules, DDR3/LPDDR3 DRAM, and EMMC/NAND Flash variants, ensuring a resilient supply chain against component shortages. ● Streamlined Production: Avoids the "Double-Reflow" trap, significantly lowering the barrier for entry for smaller factories and reducing the scrap rate during mass production. ► Key Technical Features: ● Ultra-Fast Boot: Optimized Linux kernel achieving a 18-second cold boot time. ● Memory Efficiency: Stable and fluid operation on configurations as low as 512MB DRAM + 1GB EMMC. ● Ruggedized Layout: Built-in immunity to high-frequency interference, ideal for smart kitchen appliances and industrial environments. ● Dual-OS Support: Native compatibility with both Android and Linux, providing flexibility for diverse UI and logic requirements. ► Scalability & Proven Success (Mass Production): ● Industrial Automation (ESOP): Deployed as the central processing unit for factory-wide Electronic Standard Operating Procedure systems. ● High-End Consumer Tech (LG DUOBO): Trusted as the core compute engine for premium smart devices. ● Smart Kitchen Appliances: Successfully integrated into high-power microwave steam ovens, leveraging its radiation-resistant design. This SOM represents my commitment to "Zero-Defect Manufacturing." I provide a hardware core that is not only powerful but also audited for production reliability, allowing you to focus on your product's unique features while I handle the complexities of the underlying architecture.
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Altium Designer(1)
Adeagbo AbdulJeleel's avatar
Adeagbo AbdulJeleel
Lagos, Nigeria
Designing PCBs, electronics, embedded and product design
New to Contra
Designing PCBs, electronics, embedded and product design
Cover image for Tycobrahe Octavia - Guitar Effects
Tycobrahe Octavia - Guitar Effects Pedal PCB I designed a custom PCB for the Tycobrahe Octavia, a distinctive guitar effects pedal known for its unique octave and fuzz-style sound. The project involved translating the circuit requirements into a practical, production-ready PCB layout with careful component placement, routing, and attention to signal integrity. The board was designed for a client with a focus on reliability, clean routing, compact layout, and ease of assembly.
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Cover image for IO Board for Raspberry Pi
IO Board for Raspberry Pi CM4 CM4 is a Raspberry Pi s computer module that is without the IO connectors. My job was to Design IO Board for the CM4 in a compact size with onboard 36v Power input support. it was challenging work but after the testing and prototyping of one design, we successfully completed it. The IO (Input Output) PCB supports HDMI Display Port, USB, Audio Output, USB C, and Power Input ports.
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Cover image for I designed a custom PCB
I designed a custom PCB integrating an ESP32 wireless module, power management, USB connectivity, switching regulators, and supporting electronic components. The design focuses on reliable power distribution, compact component placement, and practical manufacturability for an IoT hardware application.
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Cover image for IoT-Based USD to IDR Exchange
IoT-Based USD to IDR Exchange Rate Display Using Bank BCA Exchange Rates Real-Time Bank BCA USD/IDR Exchange Rate Monitor using ESP32 and OLED Display with live internet updates. Features: • Real-time USD/IDR exchange rate display • ESP32 WiFi connectivity • OLED SSD1306 interface • Automatic online data refresh • Lightweight and low-power system • Compact embedded monitoring device #ESP32 📡 | #IoT 🚀 | #EmbeddedSystems 💻 | #Arduino ⚙️ | #Programming 📚
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Altium Designer(3)