Anti-Reverse Bluetooth PCB Carrier Board (Ultra-Low Power Design)

SKU: FA2043-3
Input Voltage (VCC)

3.6V – 6.0V DC
Output Voltage

Constant 3.3V (Regulated)
Logic Level (I/O)

Fully compatible with 3.3V and 5V TTL
Protection Type

Diode-based Anti-Reverse Power Protection
Quiescent Current

< 100µA (Board only, excluding module)
Interface Header

Standard 6-Pin (STATE, VCC, GND, TXD, RXD, EN/KEY)
Operating Temp

-40°C to +85°C (Industrial Grade)
Board Dimensions

37.5mm x 15.5mm
Product Description
The Anti-Reverse Bluetooth PCB Carrier Board is a professional-grade interfacing solution designed to host and protect standard Bluetooth serial modules (such as HC-05, HC-06, and HM-10). Engineering mistakes during prototyping—specifically reversing the power supply—are the leading cause of module failure. This carrier board solves that problem with an integrated anti-reverse protection circuit, ensuring that your Bluetooth module remains safe even if the VCC and GND wires are accidentally swapped.
Beyond protection, this board features a high-efficiency onboard power management system that supports a wide input voltage range (3.6V to 6V) and provides stabilized 3.3V power to the mounted module. With built-in level-shifting circuitry, it allows for direct, safe communication between 3.3V Bluetooth chips and 5V microcontrollers like the Arduino Uno. This is the ideal “safety-first” baseboard for educational kits, industrial sensor nodes, and rapid prototyping.
Key Features
  • Active Anti-Reverse Protection: High-speed protection circuitry prevents module burnout if power polarity is reversed.
  • Ultra-Low Power Architecture: Optimized trace layout and low-dropout (LDO) regulator minimize idle current, extending battery life for portable IoT applications.
  • Universal Module Compatibility: Designed with standard 1.5mm/2.0mm pitch pads to accommodate HC-05, HC-06, HM-10, and AT-09 Bluetooth modules.
  • Onboard Logic Level Shifting: Safely bridges 3.3V Bluetooth signals with 5V TTL systems without the need for external resistor dividers.
  • Clear Status Indication: Dedicated pads for a status LED provide visual confirmation of pairing and connection states.
  • Industrial Build Quality: High-quality FR-4 PCB material with gold-plated finish for superior solderability and corrosion resistance.
Usage & Applications
  • Educational Kits: Perfect for student labs where accidental wiring errors are common; prevents costly hardware replacement.
  • Industrial Prototyping: A stable base for testing Bluetooth connectivity in factory environments with variable power supplies.
  • Battery-Powered Devices: Use this board to create low-power wireless data loggers that need to run for months on small cells.
  • Custom Product Development: Quickly convert bare Bluetooth SMD chips into breadboard-friendly modules for rapid firmware debugging.
Q: Does this board include the Bluetooth module itself?

This is a carrier board (baseboard) only. It is designed for users who already have a bare SMD Bluetooth module (like an HC-05 or HM-10) and want to mount it to a protective, pin-friendly interface

Q: What happens if I connect the battery terminals backward?

Nothing! The anti-reverse protection circuit will block the current, preventing any damage to the board or your expensive Bluetooth module. Simply swap the wires to the correct orientation, and the board will function normally

Q: Can I use this with a 5V Arduino?

Yes. The board includes onboard level conversion. You can connect the TX and RX pins directly to your 5V Arduino without needing a voltage divider or logic level shifter.

Q: Is it compatible with Bluetooth 4.0 BLE modules?

Yes, it is compatible with any module that follows the standard HC-series footprint, including BLE modules like the HM-10 or AT-09.

Q: Does it have a button for entering AT mode?

This specific version is a button-free design to maintain a slim profile. You can enter configuration modes by pulling the “KEY” or “EN” pin HIGH or LOW (depending on your module’s firmware) via your microcontroller.

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