In this issue

4: Device Trees in Embedded Linux: Using an External LED on a PocketBeagle as an Example, By Pedro Bertoleti
10: Let’s Understand Ground Stitching Vias, By Robert Lacoste
16: AWS for IoT Projects: Getting Started, By Dhairya Parikh
23: TECHNOLOGY FEATURE: Wearable Devices: A Brave New World, By Michael Lynes
28: DATASHEET: IoT Boards and Modules: Connect to the Internet of (All of the) Things, By Sam Wallace
32: EMBEDDED SYSTEM ESSENTIALS: Fault Injection and Power Analysis: Part of Your Appliance Repair Toolkit?, By Colin O'Flynn
38: PICKING UP MIXED SIGNALS: A Lock-In Amplifier: Based on a PSoC5LP SoC, By Brian Millier
48: FROM THE BENCH: Blood Pressure Record Keeping: Building an ESP32-to-Raspberry Pi Bridge, By Jeff Bachiochi
63: TECH THE FUTURE: The Future of Experience Driving: Smart Digital Cockpits—Enabled, By Miao Luo

Circuit Cellar Magazine Description:

Circuit Cellar magazine features engineering tutorials, detailed microcontroller-based projects, and embedded systems industry news for professional electrical engineers, EE/ECE academics, and highly skilled electronics enthusiasts. Since 1988, Circuit Cellar has featured projects and tutorials from the world's top engineers on subjects such as embedded development (e.g., prototyping and programming), signal processing (e.g., DSP chips and signal conditioning), programmable logic (e.g., FPGA projects), sensor systems (e.g., smart sensors and MEMS), 'Net-connected devices (e.g., IoT projects and protocol stacks), robotics (e.g., robotic systems and proximity sensing), and much more. Circuit Cellar is the ultimate resource for all of your electrical engineering-related needs.