Ardiuno/51 TM1638 3-wire control 8-bit common anode led keyboard

Weight : 34 g

Color : as picture show

Size : 68mmx68mm/2.68"x2.68"(inch) (approx)

*Only need 3-wire control.

*Adapts TM1638 digital tube drive chip. Common anode LED digital tube.

*Only need three common IO and could drive, no need MCU scan, save MCU sources.

*With 8 8digital tube (including decimal point).

*2*8 16 buttons.

*Support 8 degree brightness adjustment.