| SBK_AvrBuzzer | Non-blocking passive piezo buzzer library for AVR-based Arduino boards. |
| SBK_BarDrive | High-level Arduino library for controlling and animating LED bar graph and bar meter displays. |
| SBK_Button | Lightweight push-button library with debouncing, latching, events, long-press detection, and timing. |
| SBK_HT16K33 | HT16K33 I2C LED driver compatible with SBK_BarDrive. |
| SBK_MAX72xx | MAX7219/MAX7221 LED matrix driver with software and hardware SPI support. |