Display Module Digital Tube Spi Control Red MAX7219 8-Digit Led For Arduino I mc
3,07 €
VCC and GND Do not reversed, it would burn the chip. 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. Wiring instructions (a program, for example, you can pick any IO port definition can be modified in the program).
Jetzt bei Ebay: