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Product overview
The Whadda chip key display module features a combination of eight 7-segment displays, eight red
LEDs, and eight push-buttons making it ideally suited for making simple user interfaces.
All of the LEDs and buttons are driven and/or read by a TM1638 LED controller IC. This driver chip
uses a simple 3-wire serial interface to communicate with your Arduino® compatible board.
Specifications:
Driver chip: TM1638 LED controller
Supply voltage: 5 V
Number of LEDs: 8
Number of 7-segment displays: 8 (with decimal point)
Number of pushbuttons: 8
Weight: 28 g
Dimensions (W x L x H): 76.2 x 50.2 x 10.6 mm
Wiring description
Pin
Name
Arduino
®
connection
VCC Supply voltage (5 V DC)
5V
GND Ground
GND
STB Chip selection input
Digital Pin 4
CLK Clock input
Digital Pin 6
DIO Serial data input
Digital Pin 7
