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Speaker small magnetic speaker 1W 8R 1 W 8 ohm diameter 66MM thick 12.7MM cone magnetic

SG90 9G Micro Servo Motor Kit for RC Robot Arm Helicopter Airplane Remote Control

Bluetooth master and slave moduleThrough the AT command, you can set this bluetooth module to the master mode can also be set to slave mode, even in iBeacon way work .it also Supports Apple Notification Center Service (ANCS)
base Board 4 PIN, leads to VCC, GND, TX, RX. You can be very convenient to connect to your arduino project or other DIY project
Working voltage 3.6 V to 6V,Default rate of 9600.There are 4PIN dupont cable in the package

Micro SD TF card reader module SPI interface with chip level conversion
Support Micro SD card, Micro SDHC card (high speed card)
board level conversion circuit, namely the interface level for 5V or 3.3V
power supply is 4.5V ~ 5.5V, 3.3V voltage regulator circuit board
The communication interface is a standard SPI interface
M2 screw positioning holes for easy installation

CH340 Serial Port Debugger USB to TTL Converter CH340G module STC Download Cable Adapter Module

5V 2 Channel SSR Solid State Relay Board Power Switch High Level Trigger
Working Voltage: DC 5V
Working Current: 160mA
Input Control Voltage: 0-2.5V(low level,OFF), 3.3-5V(high level, ON)
Compatible Load: AC 100-240V 2A
Module Size: 55 X 33 X 25mm/2.17 X 1.30 X 0.98inch(L*W*H)

5V Relay 1 Channel SSR Low Level Solid State Relay Module 250V 2A

4 Channel 5v Relay Shield Module for Arduino UNO R3

Standard for Shield interfaces and shape
Can continue to stack other for expansion boards
3 M3 screw positioning holes for easy installation
High Drive (5V or 3.3V) normally open contact closure
Onboard relay indicator (red)

1 Channel 5V Relay Module Low level Trigger    1-Channel relay module, with photoelectric isolation    dc or ac signal control, can control 220 v ac load    5v relay, low level trigger

L293D WiFi Motor Drive Expansion Board Shield Module for NodeMCU CP2102
Motor power, control power separation; In the experiment, by short-circuiting block the merger, the VIN and VM short, while power to the motor and the control board
Module provides short-circuit sub (short the VM and VIN), you can easily use one power (must 4.5V ~ 9V) while completing motor drive and control

L298N Motor Drive Controller Board Module Dual H Bridge DC Stepper fit Arduino Electric Projects, Smart Car Robot
Dual-channel H-bridge driver working mode creates higher working efficiency,L298N as main chip, Can drive one 2-phase stepper motor, one 4-phase stepper motor or two DC motors.
To avoid damage the voltage stabilizing chip, please use an external 5V logic supply when using more than 12V driving voltage.

Gamepad Joystick Shield Expansion Board Analog Keyboard for Arduino
Add the RF interface of nRF24L01 and Nokia 5110 LCD interface, which is very convenient for prototyping and secondary game development.
The bluetooth module interface has been added, Convenient Bluetooth wireless serial communication.