MAX7219 digital display control module
This module is compatible with 5V and 3.3V microcontrollers.
You you can use it with Arduino or Raspberry Pi.
MAX7219 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. MAX7219 supports flicker free displays as well as cascading displays.
VCC → 5V
GND → GND
DIN → P00
CS → P01
CLK → P02
Be careful not to reverse VCC and GND otherwise you may burn out the chip.
You can find a few references here
on how to use the chip and display. It's pretty straightforward, but if you need help
to get it working, let me know.
1.MAX7219 digital display module, 8 Digit Led Display, Red
2. Straight 5 pin header
3. 90 degree 5 pin header