Circuit Cellar 435 October 2026 (PDF)

Issue #435 October 2026 Critical Infrastructure 4: Automated Test Equipment for 7400-Series Integrated Circuits - Use an RP2040 MCU to Find Manufacturing Flaws in Chips, By Michelle Yang 10: Optimizing Wireless Communications - Make the Right Choices for Best Performance, By Pedro Bertoleti 18: Building a Small, Autonomous Car - Two Raspberry Pi Picos Carry the Load, By Gebran Kastoun, Ruby Wu, and Sarah Zhong 34: TECHNOLOGY FEATURE: Control and Protect Critical Infrastructure - The Two Sides of OT Management and Cybersecurity, By Curtis Franklin 40: DATASHEET: System Testing Components - Put Systems Through Their Paces - Frameworks and Instruments for Ensuring Things Are Right, By Curtis Franklin 44: START TO FINISH: Standing Wave Ratio - Understanding Antenna Efficiency, By Stuart Ball 49: MODERN EMBEDDED INSIGHTS: Zephyr RTOS - Leveraging an Ecosystem of Drivers and Middleware, By Jacob Beningo 54: UNCHARTED HARDWARE: A Steampunk GPS Desk Clock - Building with a Tiny LCD Screen and GPS, By Rob “Dr. Torq” Reilly 63: TECH THE FUTURE: The Future of Temperature Monitoring - Refrigerator Failure Prevention -Temperature Monitoring Must Move Beyond the Clipboard, By Chris Potts