1. Compatible with the market, 2009 UNO 2560 Seamless docking with mainstream controllers 
2. 4 way LED indicator (You need to know the importance of the LED 
indicator. In the actual project, with this indicator, you can directly 
use the indicator to indicate the working status of the program, which 
is convenient for program debugging. 
3. DS18B20 temperature sensorInterface, temperature measurement 
experiment can be done, this price does not include DS18B20, if 
necessary, another shot. 
4. LM35 temperature sensorInterface, temperature measurement experiment 
can be done, this price does not include LM35, if needed, another shot. 
5. 3296 precision adjustable potentiometer, Provide analog port input 
(can be used to control LED brightness, rotate the steering gear angle, 
digital voltage, etc.) 
6. Infrared integrated receiver, It can be suitable for experiments with
 any infrared remote control, this price does not include the integrated
 receiver, if necessary, another shot. 
7. Four-digit digital tube (using 74HC595 to drive IO and learn SPI), 
Can do digital tube display experiment (can display temperature, 
voltage, count value, etc.). 
8. Three independent buttons, one reset button, You can do button experiment (man-machine interface). 
9. Buzzer can be used for sound experiment. (Can call the police, pronounce, etc.) 
10. Bluetooth, wireless interface, voice module, voice recognition module, can be used for wireless communication experiments 
11. Servo interface, Convenient to drive the steering gear 
12. Infrared detection interface, It is convenient to connect with infrared, realize the statistics of people flow, etc. 
                                                                                                                                                                                 
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