Unsigned long previousMillis1 = 0 //For storing Previous time

Unsigned long currentMillis //For saving current time Long BAUD = 115200 //BAUD rate for Serial Monitior * Emitter Pin of 2N3904 Transistor connected to Pin 8 of Arduinoīyte BasePin = 4 //Base Pin of 2N3904 Transistor to Pin 4 of Arduino UNO R3īyte EmitterPin = 8 //Emitter Pin of 2N3904 Transistor to Pin 8 of Arduino UNO R3 * Collector Pin of 2N3904 Transistor connected to Arduino Ground Pin * 10K resistor connected to Base Pin of 2N3904 Transistor * Digital Pin 4 from Arduino connected to 10K Resistor * Components: Breadboard Arduino UNO R3 2N3904 Transistor 10K Resistor Jump wires. The Collector Pin is connected to Ground of the Arduino, the Emitter Pin to Pin 8 on the Arduino. I have the 2N3904 Transistor on a breadboard, I have a connection going from Pin 4 of the Arduino to one end of a 10K resistor, the other end of the resistor going to the Base Pin of the 2N3904. Secondly I'm not sure if I understand the Transistor correctly either. I'm attempting to test a 2N3904 Transistor with an Arduino UNO R3, for starters I believe I haven't coded the program correctly.

2n3904 download