LM386 Audio Amplifier Pinout Guide
LM386 pinout, how its gain-setting pins work, and a minimal wiring for a battery-powered speaker amp.
7805 Voltage Regulator Pinout and How It Works
A pinout reference for the 7805 linear voltage regulator, including typical capacitor wiring and heat considerations.
Arduino Uno Pinout Explained
A labelled reference guide to every pin on the Arduino Uno and what it does.
ESP32 DevKit Pinout Guide
A reference guide to the ESP32 DevKit’s GPIO layout, including pins to avoid.
How to Solder Your First Circuit
Step-by-step instructions for making your first solder joints on a real circuit.
Raspberry Pi GPIO Pinout Explained
A labelled reference guide to the Raspberry Pi’s 40-pin GPIO header.
Best OLED Displays for Arduino Projects
OLED display recommendations that are easy to wire up and drive from an Arduino.
HC-SR04 Ultrasonic Sensor Pinout and Wiring
A pinout and wiring reference for the HC-SR04 ultrasonic distance sensor.
How to Choose the Right Resistor Value for an LED
A simple method for calculating the correct current-limiting resistor for any LED.
How to Use a Multimeter Without Feeling Intimidated
A beginner-friendly walkthrough of the multimeter functions you’ll actually use.
