Relay Module KY-19 (Songle SRD-05VDC-SL-C)
Switch things on and off! Simple, cheap and functional.
Humidity and Temperature sensor DHT-11 (&DHT-22) for Raspberry Pi and Arduino
How to hook up the temperature sensor
Sensors onboard – DockerPi Sensor Hub
52pi's DockerPi Sensor Hub comes with the most popular sensors packed in a nice I2C-enabled HAT.
Infrared Sensor HC-SR501 PIR Motion Sensor for a Raspberry PI and Arduino
How to use PIR sensor with your Raspberry PI.
Capacitors for beginners
It's almost like going back to the future!
Diodes for beginners
Not just LEDs
Resistors for beginners
Everything you need to know about the resistors
Sonar HC-SR04 ultrasonic ranger for a Raspberry PI & Arduino
How to connect HC-SR04 Sonar module to Raspberry Pi
Beginner’s electronics guide Raspberry Pi, Arduino
Essential electronic knowledge to have to understand circuits better!
Raspberry PI sensors
Sensors for RPI - overview
