SolderHub Editorial
Articles &
Guides
In-depth tutorials, component deep-dives, and hardware engineering insights — written for builders.
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I2C vs SPI: What's the Difference and When to Use Each
I2C uses 2 wires. SPI uses 4. But the real differences go deeper than that. Here's a practical guide to choosing the right protocol for your Arduino or ESP32 project.
ESP32 Deep Sleep Guide: Extend Battery Life from Days to Months
ESP32 draws 240mA at full power — enough to drain an 18650 battery in 18 hours. With deep sleep, that same battery lasts 4 months. This guide covers all five wakeup sources, RTC memory, and real code you can drop into your next project.
Raspberry Pi GPIO Complete Guide: Pinout, PWM, I2C, and Real Examples
The Raspberry Pi GPIO header has 40 pins — but they're not all the same. This guide covers the pinout, programming in Python, PWM, I2C, SPI, and common mistakes beginners make.
Arduino Mega 2560 vs Uno: Which Board Should You Choose?
A detailed comparison of memory, pins, and performance to help you pick the right board for your project.