Item Type: LED Module Color : Blue/Red Working Voltage : DC 3-24V Polarity : Common anode/Common cathode Interface : 2.54MM with PIN/2.54MM no PIN Size: Approx. 22.86 x 14.13 x 2.11mm / 0.9 x 0.6 x 0.1in Weight: 1.3g(with Pin),0.75g(no Pin) Application: MCU, ARM, FPGA, PLC, Breadboard Optional Style: DM41A08_B_GND Blue Common Cathode With Pin DM41B08_B_GND Blue Common Cathode Without Pin DM41A08_B_VCC Blue Common Anode With Pin DM41B08_B_VCC Blue Common Anode Without Pin DM41A08_R_GND Red Common Cathode With Pin DM41B08_R_GND Red Common Cathode Without Pin DM41A08_R_VCC Red Common Anode With Pin DM41B08_R_VCC Red Common Anode Without Pin This example code is in the public domain. // Give it a name: int D1 = 9; int D2 = 8; int D3 = 7; int D4 = 6; int D5 = 5; int D6 = 4; int D7 = 3; int D8 = 2; // the setup routine runs once when you press reset: void setup() { // initialize the digital pin as an output. pinMode(D1, OUTPUT); pinMode(D2, OUTPUT); pinMode(D3, OUTPUT); pinMode(D4, OUTPUT); pinMode(D5, OUTPUT); pinMode(D6, OUTPUT); pinMode(D7, OUTPUT); pinMode(D8, OUTPUT); } // the loop routine runs over and over again forever: void loop() { digitalWrite(D1, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a 200 Millisecond digitalWrite(D1, LOW); // turn the LED off by making the voltage LOW digitalWrite(D2, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a Millisecond digitalWrite(D2, LOW); // turn the LED off by making the voltage LOW digitalWrite(D3, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a Millisecond digitalWrite(D3, LOW); // turn the LED off by making the voltage LOW digitalWrite(D4, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a Millisecond digitalWrite(D4, LOW); // turn the LED off by making the voltage LOW digitalWrite(D5, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a Millisecond digitalWrite(D5, LOW); // turn the LED off by making the voltage LOW digitalWrite(D6, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a Millisecond digitalWrite(D6, LOW); // turn the LED off by making the voltage LOW digitalWrite(D7, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a Millisecond digitalWrite(D7, LOW); // turn the LED off by making the voltage LOW digitalWrite(D8, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for a Millisecond digitalWrite(D8, LOW); // turn the LED off by making the voltage LOW 1、Can be inserted directly into the breadboard 2、Wide range of applications for a variety of breadboards 3、The module is full featured and responsive 4、Adopted of high quality electronic components, and accuracy process, ensure for the durability 5、The module is suitable for MCU ARM 3D printer 4 x LED Module