3.3V Adapter Board for NRF24L01 Wireless Module

Specifications

• Product: Adapter Board
• Input Supply Voltage (VCC): 4.8V to 12V DC (5V Highly Recommended)
• Output Regulated Voltage: 1.9V ~ 3.6V DC (Nominally 3.3V)
• Operating Current: 12 mA
• Voltage Regulator IC: Onboard AMS1117-3.3
• Compatibility: 8-Pin NRF24L01 and NRF24L01+PA+LNA modules
• Operating Current: Capable of safely driving the NRF module during peak TX/RX surges.
• Dimensions (LxWxH): 26 x 18.5 x 12mm
• Indicator: Onboard SMD Power LED
• Interfacing: 6 SPI logic pins broken out for easy breadboarding.

Features:

• Allows for easy connection to nRF24L01+ modules
• Small power on SMD LED indicator
• Compatible with the NRF24L01 wireless module
• Breakout Adapter with onboard 3.3V voltage regulator accepts +5V supply and provides 3.3V for the attached nRF24L01+ module

Applications :

• Wireless Sensor Networks: Create a mesh network of temperature/humidity sensors scattered around your home or factory.
• RC Vehicles & Drones: Build reliable 2.4GHz remote controllers for custom RC cars or quadcopters.
• Industrial Automation: Transmit telemetry data from moving machinery without the hassle of tangled wires.
• Smart Home IoT Gateways: Send data from low-power nodes to a central Arduino/Raspberry Pi hub.

Unlock New Capabilities 

• Past Projects (Prerequisites): If you've mastered basic wired communication like I2C or Serial between two Arduinos, you're ready to cut the cord.
• Feature Upgrade: Adding this adapter alongside an NRF24L01 unlocks long-range (up to 100m or 1km with the PA+LNA version), high-speed (up to 2Mbps) 2.4GHz wireless communication. It eliminates power-related resets, giving your system industrial-grade stability.
• Effort/Requirements: Intermediate. You will need two Arduinos, two NRF24L01 modules, two of these adapter boards, and the RF24 Arduino Library.

Virtual Technician & Wiring Guide

• ⚠️ SAFETY WARNING: Always double-check your connections before applying power. While the adapter accepts 5V, the logic pins on the NRF24L01 module itself are 5V tolerant, meaning you can connect the SPI data lines directly to a 5V Arduino.

Standard Wiring (Arduino Uno/Nano):

• Adapter VCC ➔ Arduino 5V
• Adapter GND ➔ Arduino GND
• Adapter CE ➔ Arduino Digital Pin 9
• Adapter CSN ➔ Arduino Digital Pin 10
• Adapter SCK ➔ Arduino Digital Pin 13
• Adapter MOSI ➔ Arduino Digital Pin 11
• Adapter MISO ➔ Arduino Digital Pin 12

(Plug the 8-pin NRF24L01 module into the female header on the adapter board).

Package Includes:

• 1 x 3.3V Adapter Board for NRF24L01 Wireless Module

Frequently Asked Questions (FAQ)

• Why do I need this adapter board for my NRF24L01?
  The NRF24L01 requires a strict 3.3V power supply and draws sudden spikes of current during transmission. Arduino 3.3V pins often cannot supply enough current, leading to dropouts. This adapter has a dedicated regulator and capacitors to solve this.
• Can I power this adapter with 5V?
  Yes, the adapter is specifically designed to take 5V input on the VCC pin and safely regulate it down to 3.3V for the module.
• Can I input 12V into the VCC pin?
  While the AMS1117 regulator technically supports up to 12V, it will get very hot dissipating the excess voltage. We strongly recommend sticking to 5V.
• Do I need logic level converters for the SPI pins?
  No. The data logic pins (MOSI, MISO, SCK, CE, CSN) on the NRF24L01 are 5V tolerant, so you can connect them directly to a 5V Arduino.
• Does this adapter work with the NRF24L01+PA+LNA version?
  Yes! The PA+LNA version with the external antenna draws even more current during transmission, making this adapter board absolutely essential for stable operation.
• My module still isn't working, what's wrong?
  Double-check your SPI wiring (MOSI to 11, MISO to 12, SCK to 13 on Uno) and ensure the module is firmly seated in the adapter socket.
• What is the onboard LED for?
  The SMD LED lights up to indicate that the board is receiving power and successfully outputting 3.3V.
• How do I mount this adapter board?
  The board is compact and lightweight; it can be left inline with jumper wires, heat-shrinked, or secured with double-sided foam tape in your enclosure.
• Will this work with an ESP32 or STM32?
  Yes, but since ESP32 and STM32 already run on 3.3V logic and have robust 3.3V regulators, this adapter is mostly beneficial for older 5V systems like the Arduino Uno.
• What library should I use with Arduino?
  We highly recommend the "RF24" library by TMRh20, available directly in the Arduino Library Manager.
• What is the maximum output current of the adapter?
  The onboard AMS1117-3.3 regulator can theoretically output up to 800mA, which is more than enough for the NRF24L01's peak draw of ~115mA.
• Can I plug this directly into a breadboard?
  No, the adapter uses a 2x4 female header for the NRF module and standard male pins for external connections. You will need female-to-male jumper wires to connect it to a breadboard.
• Does the adapter change the pinout of the NRF24L01?
  No, the adapter simply breaks out the 6 data pins exactly as they are on the module, while replacing the power pins with its own regulated VCC and GND.