Quantity   Component name
1 × Adafruit Pro Trinket - 3.3V 12MHz
1 × SparkFun Micro OLED Breakout To display a basic menu and information
1 × Adafruit Trellis Monochrome Driver PCB for 4x4 Keypad & 3mm LEDs The main input interface used in the various edit modes
16 × Green LEDs 3mm To provide visual feedback during playback
1 × Adafruit Silicone Elastomer 4x4 Button Keypad - for 3mm LEDs Pushy buttons
1 × Sparkfun 5-Way Tactile Switch Breakout To navigate through menus and to select options/functions
1 × W25Q80BV - 1 MByte SPI Flash To store songs, patterns, tracks, samples
1 × TLV2462 Dual Rail-to-rail Op-Amp Dual Audio op-amp for headphones out
1 × 3.7 V @ 2000 mAh LiPo Battery To provide enough juice to make loads of music
1 × LTC2955 Pushbutton on-off controller For soft power-on/off sequencing
1 × FT232RL Serial-to-USB converter Used for communication with PC to download/upload songs
1 × MCP73831 LiPo Battery Charger Power Management ICs / Power Supply Support
1 × MAX17043 I2C LiPo Battery Fuel Gauge Power Management ICs / Battery Management ICs
2 × TPS61200 Step-up/down regulator One fixed at 3.3V 200mA max,the other fixed at 5V 600 mA max
2 × BSS138 P-Channel MOSFET Used as a 3.3V5V level translator