Circuit Cellar 422 September 2025 (PDF)

Issue #422
September 2025
Autonomous Mobile Robots

4: Sensors in the Soil - A Compact Solar-Powered Soil Monitoring System for Smart Farming, By Maheshwaran Sadasivam and Vairamani Kanagavel

13: Control Your Local IoT Network from the Cloud - Secrets of “Cloud Relaying” Revealed, By Gamal Labib

18: Build a Follower Counter for Social Media - See Real-Time Metrics Using an Arduino Yún, By Andrei Florian

28: Chaos on Your Desktop - Build a Color-Pulsing Light Sphere Using a PIC or Raspberry Pi Pico MCU, By Dev Gualtieri

32: Audio AI on the Edge: A Primer for Device Makers - AI Has Changed Audio, But Not Audio Hardware (Yet), By Music.AI

34: TECHNOLOGY FEATURE: Autonomous Mobile Robots - Robots Moving to Their Own Beat, By Curtis Franklin

40: DATASHEET: MCUs with Built-In Security - Compact Computing without a Security Penalty, By Curtis Franklin

44: PICKING UP MIXED SIGNALS: The DVM on Your Wrist - A Wireless Link Between a DVM and a Smart Watch, By Brian Millier

52: EMBEDDED SYSTEM ESSENTIALS: EMFI-Triggered Software Faults - Can They Drive a Car Crazy?, By Colin O'Flynn

63: TECH THE FUTURE: The Future of Wide-Area Communications - Flexible Platforms in the Sky - Stratospheric Drones Could Change How We Connect, By Hamed Khalkhali, PhD