Key features and benefits - Three LEDs for clear status indicators: TXD LED to monitor transmission activity, an LED indicator, and a power LED to show when the device is powered - Flexible power options: supports 5V external power supply, 3.3V external power supply, or an external supply in the 3.3V to 5V range - Reverse protection: 500 mA recovery fuse prevents damage from accidental reverse connection - Simple pinout for easy wiring: GND, TXD, 3V3, and 5V are brought out with bend pins for straightforward connections What this product does - Provides a reliable UART interface with visible status indicators to help you monitor activity and power status at a glance - Enables operation from either 3.3V or 5V power domains, giving compatibility with a wide range of microcontrollers and development boards - Protects your setup during prototyping and testing with an auto-recovery fuse that guards against reverse polarity Compatibility and use cases - Microcontroller and development board debugging: connect to UART capable devices (3.3V or 5V systems) using the TXD signal with clear TX activity indication - Prototyping and testing in mixed voltage environments: power from 3.3V or 5V external supplies as needed, while maintaining a stable TXD connection - Safe prototyping with protection: reverse connection protection helps prevent damage during quick, ad-hoc experiments Pinout and connection - GND, TXD, 3V3, 5V exposed on bend pins for easy wiring and reliable connections across projects Notes - The product highlights three LEDs for status, supports multiple external power options within 3.3V–5V, includes a 500mA recovery fuse for reverse protection, and provides a bend-pin header with GND, TXD, 3V3, and 5V pinout.