BME280 3.3V Barometric Pressure Sensor Atmospheric Temperature Humidity Sensor Module I2C SPI Breakout Board for Arduino Weather Navigation GPS Monitor (Pack of 2): Amazon.com: Industrial & Scientific
Amazon.com: Kuman UNO R3 Board ATmega328P with USB Cable for Arduino - Compatible With Arduino UNO R3 Mega 2560 Nano Robot for Arduino IDE AVR MCU Learner K53, Blue : Electronics
Amazon.com: Midi Controller, lotmusic Worlde TUNA PANDA MINI 25 Keys Portable USB Midi Keyboard with 8 RGB Backlit Colorful Drum Beat : Musical Instruments
Amazon.com: KEYESTUDIO Mega 2560 R3 Board for Arduino Projects with USB Cable : Electronics
Amazon.com: Donner STARRYKEY MIDI Keyboard MIDI Controller, Full Size 25 keys, 7 Colors Lighting Effect, 8 Velocity-sensitive Backlit Pads with 24 Selectable Custom Tones, with MIDI out and Pedal interface : Musical Instruments
Amazon.com: Solid State Relay SSR Board for Arduino Mega-2560 Due : Industrial & Scientific
DIY USB Midi Controller With Arduino: a Beginner's Guide : 10 Steps (with Pictures) - Instructables
Amazon.com: AITRIP 5Pcs Digispark Attiny85 Micro Miniature Microcontroller USB Development Board Module Compatible with Arduino IDE 1.0+ (OSX/Win/Linux) : Electronics