Guides

What Is a Crystal Oscillator? Wiring and Errors...

Crystal oscillators explained: why most boards already have one wired in, the Pierce oscillator pattern, and two buildable alternatives. India pricing.

What Is a Logic Level Shifter? Wiring and Error...

Logic level shifters explained: the 3.3V/5V mismatch problem, bidirectional module wiring, and their two honest limits. India pricing (COD).

What Is an Onboard Voltage Regulator? A 2026 Guide

Voltage regulators explained: linear (LDO) vs switching (buck), the heat trade-off, and how to set up a buck converter module. India pricing (COD).

What Are Capacitive Touch Pins? Wiring and Erro...

ESP32 capacitive touch pins explained: the 10-channel T0-T9 map, the strapping-pin gotcha, and a touchRead baseline sketch. India pricing (COD).

What Is a Real-Time Clock (RTC) Module? A 2026 ...

RTC module explained: why boards can't keep time on their own, the DS3231 vs DS1307 accuracy gap, and the RTClib read pattern. India pricing (COD).

What Is the Watchdog Timer? Wiring and Errors (...

Watchdog Timer explained: the dead-man's-switch mechanism, what it catches and doesn't, and a complete AVR arm-and-feed example. India pricing (COD).