Note – this kit is FINE for both Arduino and Raspberry Pi as well as just about any Microcontroller. This is the initial “Sensor Pack” I got started with. You can purchase it on Amazon for under $22 as of this writing.
Here are the components typically in this pack:
HW-040 Rotary Encoder Module
HW-477 Two Color Common Cathode RG LED Module
HW-478 SMD RGB 3 Color
HW-479 RGB LED Module
HW-480 Two Color Common Cathode GR LED Module
HW-481 7 Color Flash / Colorful Auto Flash Module
HW-482 Relay Module
HW-483 (Push) Button Module
HW-484 Reed Switch Sensor
HW-485 Big Sound / Large Sound Microphone Voice Sensor Module
HW-486 Photoresistor Sensor Module
HW-487 Light blocking/break sensor module
HW-488 Obstacle Avoidance sensor module
HW-489 Infrared transmit module
HW-490 Infrared Receive Sensor Module
HW-491 Flame Sensor Module
HW-492 Analog Hall Sensor
HW-493 Laser Emitter module
HW-494 Touch Sensor Module
HW-495 Analog Hall Sensor Module
HW-496 High Sensitive Microphone Voice Sensor Module
HW-497 Mini Reed / Magnetic Reed Spring Module
HW-498 Analog Temperature Sensor Module
HW-499 Light Cup – Magic Ring Cup Module Mercury Tilt + RGB LED
HW-500 Tap / Knock Sensor Module
HW-501 Ball switch module (tilt)
HW-502 Heartbeat / Finger pulse sensor module
HW-503 Digital Temperature Sensor Module
HW-504 Joystick Module
HW-505 Tilt Switch Mercury (Hydrargyrum) Module
HW-506 18B20 Temperature Sensor Module
HW-507 Humidity Sensor Module
HW-508 Passive Buzzer Module
HW-509 Linear Hall Sensor Module
HW-511 Tracking Sensor Module
HW-512 Active Buzzer Module
HW-513 Shock Switch Sensor Module
Note that the included contents of many of these “Sensor Packs” change without warning. Please verify on Amazon before purchasing. Also, add a comment below if Amazon shows something different than what is here or if yours comes with different components.