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NRF24L01 2.4GHz Wireless RF Transceiver Module with NRF24L01 Socket Breakout Adapter 8 Pin Plate Board Breakout Adapter with on-Board 3.3V Regulator
NRF24L01 Wireless Transceiver Module: Built-in 2.4Ghz antenna: available software to set the address, only received local address when output data(Provide interrupt instruction), can be directly connected to a variety of microcontrollers. Compatible with Arduino and Raspberry Pi.

NRF24L01 Wireless Module Transceiver 2.4 GHz + SMA Antenna +  Breakout Adapter On-Board 3.3V Regulator - Arduino
【NRF24L01】is 2.4GHz ISM band transceiver for arduino, which has the abilities of auto-acknowledge and auto-retransmit and support up to six channels of data reception.
【NRF24L01】Includes on board support components and the RFX2401C which is the PA (Power Amplifier) and LNA (Low-Noise Amplifier)
【NRF24L01】The module has 5V tolerant inputs which allows for direct connection of SPI pins to the Arduino.
【Wireless Module】Small power on SMD LED indicator; On-board 3.3V voltage regulator accepts your Arduino +5V supply and provides 3.3V for the attached "NRF24L01+" module.

51 MCU development board STC89C52 learning board AVR minimum system AT89S51
1. Product Name: nh5100 development board
2. Main control chip: STC89C52
3. Crystal frequency: 11.0592m/12m

DC 12V Mini Submersible Water Pump 300L/H 63 Gallon Pump
VOLTAGE--DC12V/4.5W （AC is forbiden, Red wire "+" Black wire "-"）
Overvoltage Protection-If the voltage over DC12+1.5V, the water pump will power off.
Specification-Max Flow: 300L/H (63 Gallon); H-Max (Lift height): 0-3m
No Self-priming function-It must be completely immersed in water when using.
Detachable & Cleanable-Use only in clean water, not corrosive liquids. Can be disassemble if you need.

Smart Car Robot Tire Wheel with DC 3-6v Gear Motor
Parameter Operating voltage: 3V ~ 6V DC
Reduction ratio: 1:48
Maximum torque: 800k.cm
Tire diameter: 65mm,Tire thickness: 28mm

GY-NEO6MV2 NEO-6M GPS Flight Controller Module 3V-5V with Super Strong Ceramic Antenna for Arduino EEPROM APM 2.5

Mini MP3 Player Audio Voice Module TF Card U Disk Board for DFPlayer Audio Voice Music Module
Supports sampling rates (KHz): 8/11.025/12/16/22.05/24/32/44.1/48
MP3 Player Audio Voice Module

SIM800L V2.0 5V Wireless GSM GPRS Module Quad-Band W/Antenna Cable Cap M105

Fan Motor 5V L9110 Module

HC-06 Bluetooth Serial Pass-Through Module
Works with any USB Bluetooth adapters.
Default Baud Rate: 9600,8,1,n.
Built in antenna.
Coverage up to 30ft.

Speaker small magnetic speaker 3W 4R 3 W 4 ohm diameter 36MM thick 20MM cone magnetic

13KG 15KG Servos Digital MG995 MG996 Servo Gear for Futaba JR Car RC Model Helicopter Boat