ALAMSCN 4PCS 8 Digit 7 Segment Module MAX7219 Digital Segment Tube LED Display Module by Amazon.co.uk

• This 8 digit 7 segment module is an integrated serial input / output common-cathode display driver, which connects your microprocessor to a 7-segment digital LED display with 8 digits.

• Only three IO ports are used to drive the eight digit display. Digital LED display supports flicker free displays as well as cascading displays; PCV board four corners of the fixed copper stud, which can effectively precent short circuit accidents happen.

• This 8 digits 7 segment display has individual LED segment control and digital and analog brightness control.

• 8 Digits 7 Segment is easily programmable via the Open Source Software Libraries for Microcontrollers, which you can download from the Internet.

• NOTE: 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.