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Crazyradio PA

The Crazyradio PA is a 2.4 GHz radio USB dongle with a power amplifier.

Currently it's only used to communicate with the Crazyflie Nano Quadcopter but it can be adopted to work with a number of applications that are based on the low-cost 2.4 GHz chips from Nordic Semiconductor.


  • Radio power amplifier giving 20dBm output power
  • > 1km range LOS with Crazyflie 2.0
  • 2×5 2.54mm header for prototyping (not mounted)
  • Hardware support for PPM
  • Same mechanical footprint as the first generation Crazyradio
  • Open source firmware
  • Firmware upgrade via USB
  • Low latency

User guide




  • Based on nRF24LU1+ chip from Nordic Semiconductor
    • 8051 MCU at up to 16MHz with 32Kb flash and 2Kb SRAM
    • 2.4GHz ISM band radio
    • USB device peripheral
    • 125 radio channels
    • 2Mbps, 1Mbps and 250Kps communication data-rate
    • Sends and receives data packets of up to 32 bytes payload
    • Automatically handles addresses and packet ack
    • Hardware SPI and UART
    • Compatible with Enhanced ShockBurst protocol from Nordic Semiconductor
  • Radio specification:
    • 20dBm output power (100mW)
    • Low Noise Amplifier (LNA)
    • RP-SMA connector
  • Can be powered with up to 13V via expansion header
  • 2×5 2.54mm expansion header with following signals (not mounted):
    • Hardware support for PPM input
    • Up to 13V input power
    • GND
    • PPM
    • SPI/UART
  • Standard USB-A connector
  • Mechanical specification:
    • Weight: 6g
    • Size (WxHxD): 58x16x6.5mm (including connectors)
projects/crazyradiopa/index.txt · Last modified: 2015-07-15 16:31 (external edit)