This is a four digit numeric display.Its digit height is 0.56" and it is common cathode. It releases red luster.
0.56″ Digit Height
Excellent Character Apperance
Easy Mounting On P.C.B Boards Or Sockets.
Black /Gray Face, White Segment
TM1638 Chip Key Display Module 8 Bits Digital LED Tube For AVR Arduino
8 Bits, 8 keys, 8 LEDs, 8 digital tubes, common cathode LED digital tube.
With TM1638 Chip, this module gather more than three common SCM peripheral circuits.
The advantage is only three IO ports will be occupied when..