Control Interface: A total of four pins (GND, VCC, DIO, CLK), GND to ground, VCC is the power supply, DIO of data input and output pin, CLK is the clock signal pin.4 x M2 screw holes for mounting and easy installation.Compatible with 5V and 3V3 voltage levels.Since this is a popular module, sample codes, libraries and example projects are available on the internet to help you get started with your display. It also comes with 4 x mounting holes which can be used to mount it to an enclosure. The display comes with 8 adjustable brightness levels! It works with both 5V and 3V3 voltage levels. This display connects to an Arduino using 2 wires only! Using only 2 Digital Input/Output pins for communication, it allows you to use the other pins for your project. This simplifies connection and programming making it easier and faster to use this board in you next project. It has all the external circuit required to drive a 4 Digit 7 Segment Display. This display module is great to display data from an Arduino/microcontroller.
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