Handling Asynchronous Events with Hardware Interrupts on Arduino AVR
Learn how to use hardware interrupts on Arduino AVR boards to capture asynchronous events instantly, avoiding the latency and missed triggers associated with polling.
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GPIO Edge Detection on Raspberry Pi: Choosing Between sysfs and libgpiod
A practical look at GPIO edge detection on Raspberry Pi—when to use sysfs, when to reach for libgpiod, and why debounce behavior changes between Pi 3 and Pi 4.
raspberrypiDesigning Arduino Sketches Around External Interrupts: An Architecture Note
An architecture note on Arduino external interrupts: the ISR-as-flag pattern, volatile and atomic-read boundaries, operational checks, and the failure modes that should change your design.
Choosing the Right Arduino Timer: A Practical Guide for Precise Timing and PWM
When you need exact timing or custom PWM on an Arduino Uno, you’ll likely touch the hardware timers. This post walks through the three timers, shows a concrete example of using Timer1 for a 1 kHz control loop, and explains how to avoid common pitfalls and conflicts with core libraries.
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