In this issue

6: Getting Started with AI at the Edge: Using QuickFeather and SensiML, By Raul Alvarez-Torrico
14: Hacking MCU Pins: Repurposing Peripherals, By Stuart Ball
20: Building a COVID Test Drone (Part 2): Building the System, By Andrei Florian
34: COM Boards Enable Smart Warehouse Robots: Automated Assistants, By Dan Demers
38: Connected Cars Drive Needs for Advanced Chip Solutions: MCUs, SoCs and More, By Jeff Child
46: Technologies Enable Rich Features for Wearables: Big Challenges for Small Devices, By Jeff Child
52: DATASHEET: Open-Spec SBCs: Focus on Low Cost, By Jeff Child
56: PICKING UP MIXED SIGNALS: Build a CNC Pendant for Mach3: Controller Redesign, By Brian Millier
63: EMBEDDED SYSTEM ESSENTIALS: AirTag Teardown and Security Analysis: Hacker vs. Tracker, By Colin O’Flynn
68: FROM THE BENCH: How Gun-Style IR Thermometers Work (Part 1): Foreheads and Fahrenheits, By Jeff Bachiochi
75: Product News
78: Test Your EQ
79: The Future of Secure Encryption: Embedded Tech Enables Blockchain and Crypto, By Paul Golata

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.