Lasers! KY-008 laser module for Raspberry Pi & Arduino
You can never go wrong with lasers!
LED modules for Raspberry PI, Arduino
Everything you need to know about LEDs to get started.
Hall sensor module KY-003 & KY-024 for Raspberry Pi and Arduino
Small magnetic sensor that can be used as a switch or a detector.
Electronic components are useful!
It's very useful
My first steps with Raspberry Pi Camera Module 3
My first steps with Raspberry Pi Camera Module V3 - how does it fare against other modules, Octoprint and getting started
Capacitors for beginners
It's almost like going back to the future!
Infrared Sensor HC-SR501 PIR Motion Sensor for a Raspberry PI and Arduino
How to use PIR sensor with your Raspberry PI.
Raspberry PI sensors
Sensors for RPI - overview
Humidity and Temperature sensor DHT-11 (&DHT-22) for Raspberry Pi and Arduino
How to hook up the temperature sensor
Resistors for beginners
Everything you need to know about the resistors