HALJIA 4-Digit 4-Segment Digital TM1637 LED Tube Clock Display Module With Brightness Adjustable Compatible with Arduino

This is a 4-digit common anode red display module with TM1637 driver chip. Digital tube has 8 adjustable grey levels. The voltage of control interface can be 5V or 3.3V. 4 M2 screw positioning holes for easy installation. Size: 42 x 24 x 12 mm Control Interface: a total of four pins (GND, VCC, DIO, CLK)GND: GroundVCC: Power supplyDIO: Data input/outputCLK: Clock signalDigital tube: 4 common anode points with 0.9 cm LED, red bottomPositioning holes: 4 M2 screws positioning hole, diameter 2.2 mm, the positioning of the modules is easy to install to inter-combinationDownload link:http://download.haljia.com/download/Display/DisplayClockModule/DisplayClockModule.rar Package Inculded: 1 x clock display module