MAX7219 Dot Matrix Module Microcontroller Module 4 in 1 Display 1 X Rotary encoder module

1 X Rotary encoder module

3pcs Line tracking module

Supply voltage: 3

the antenna interface can be arbitrary switching PCB glue stick antenna and suction cups

Since this kit could be programmed by "Arduino Code" we may say that's it is suitable for 9+ years old kids

MAX7219 Dot Matrix Module Microcontroller Module 4 in 1 Display 1 X Rotary encoder moduleThis MAX7219 Microcontroller 4 in 1 Display Dot Matrix Module is an integrated serial input output common cathode display driver, it connects the microprocessor 7 segment digital LED display with 8 digits, you can also connect a bar graph display or 64 independent LED. Including a B type BCD encoder chip, multi channel scanning loop segment word driver, but also a static RAM 8 x 8 for storing each data. Only one external register is used to set the