Compact, flexible power and signal breakout with visual status indicators — ideal for development, testing, and small embedded projects. Key benefits Flexible power options: choose 5V, 3.3V, or an external supply in the 3.3V–5V range to match your target device without extra adapters. Instant visual feedback: three onboard LEDs (TXD LED, LED, and power LED) show power status and data activity so you can quickly verify operation and troubleshoot. Easy wiring and mounting: GND, TXD, 3V3, and 5V are available as outward-bent pins for tidy connections; reserved pads expose other function pins for future expansion or custom wiring. Saves development time: the combination of selectable power rails, visible indicators, and accessible pins reduces setup and debugging effort during prototyping. Features (consistent with original specifications) Power supply options: external 5V, external 3.3V, or external supply within 3.3V–5V. LEDs: TXD LED, LED, and power LED provided on board. Pins outwards: GND, TXD, 3V3, and 5V provided via bent pins. Expansion: other function pins available as reserved pads. Compatibility and practical notes Intended for systems that require 3.3V or 5V power rails and a TXD signal path; use the appropriate external supply option for your device. Bent pins make it straightforward to connect to breadboards, headers, or wiring harnesses; reserved pads let you add other signals or custom headers as needed. LEDs enable quick on-board verification of power and TXD activity without additional tools. Typical use scenarios Rapid prototyping: power a microcontroller or sensor module at 3.3V or 5V while monitoring TXD activity during firmware bring-up. Bench debugging: use the power LED and TXD LED to confirm device power and transmission during serial testing or firmware flashing. Small embedded projects: supply stable 3.3V or 5V rails to peripheral modules and use reserved pads to integrate extra control or status lines. What you get A compact breakout with selectable external power input options, three status LEDs (TXD, LED, power), outward-bent GND/TXD/3V3/5V pins, and reserved pads for additional functions — designed to simplify power and signal handling without changing your device design.