The NRF24L01+ Socket Adapter is a specialized power regulation and breakout board designed to simplify the connection between an NRF24L01+ wireless module and a microcontroller. Its primary function is to provide a stable 3.3V power supply from a 5V source, addressing the common issue where microcontrollers (like the Arduino Uno) fail to provide enough peak current for stable wireless transmission.

Specifications

• Input Voltage: 5V DC
• Output Voltage: 3.3V DC (Regulated range: 1.9V to 3.6V)
• Onboard Regulator: AMS1117-3.3V
• Indicators: Onboard Power LED
• Compatibility: Fits standard 8-pin NRF24L01+ and NRF24L01+PA+LNA modules

Features

• Integrated Voltage Regulation: Features an AMS1117 3.3V regulator that allows the module to be powered directly from a 5V rail while protecting the sensitive NRF24L01+ chip from overvoltage.
• Improved Signal Stability: Includes onboard filtering capacitors that help manage the high-current spikes during radio transmission, significantly reducing "failed to send" errors and connection drops.
• Ease of Wiring: Breaks out the high-density 2x4 female header of the NRF24L01+ into a single row of 0.1" pitch pins, making it much easier to use with standard jumper wires and breadboards.
• Power Indicator: A built-in LED provides immediate visual confirmation that the adapter is receiving power.

Pin Configuration

• VCC: 5V Power Input (Connect to the 5V pin of your microcontroller).
• GND: Common Ground.
• CE, CSN, SCK, MOSI, MISO, IRQ: These pins are pass-through headers that connect directly to the corresponding pins on the wireless module for SPI communication.

Common Applications

• Arduino Prototyping: Ideal for use with Arduino Uno, Mega, or Nano boards where the built-in 3.3V regulator is often too weak to power the NRF24L01+ reliably.
• Long-Range Communication: Highly recommended when using the PA+LNA (High Power) version of the NRF transceiver, as those modules require significantly more current.
• DIY Wireless Networks: Used in home automation gateways and remote sensor nodes to ensure hardware reliability.

Usage Tips

• Input Voltage: Always connect the VCC pin of this adapter to 5V. If you connect it to a 3.3V source, the onboard regulator will cause a voltage drop, and the radio module will not receive enough power to operate correctly.
• Secure Connection: Ensure the NRF24L01+ module is pressed firmly into the 8-pin socket. A loose connection is a frequent cause of "Module not found" errors in code.
• Logic Levels: While the adapter regulates power, it does not shift logic levels. Fortunately, the NRF24L01+ data pins are 5V tolerant, so they can usually be connected directly to 5V microcontrollers without damage.

Tutorial: https://lastminuteengineers.com/nrf24l01-arduino-wireless-communication/