Grün 5V MAX7219 MAX7219CWG 8-stellig LED Digital Tube Display Modul für Arduino
4,27 €
Arduino Module. VCC and GND Do not reversed, it would burn the chip. Wiring instructions (a program, for example, you can pick any IO port definition can be modified in the program) 51 MCU P0 port requires pull-up resistor, if your device does not have a pull-up resistor can be connected to other ports data lines.
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