EK Technologies

 Interfacing a Light Emitting Diode (LED) with Arduino What is a LED? A light-emitting diode (LED) is a semiconductor device that produces light when an electric current flows through it. Applications: Indicators, Displays such as Matrix display, Led bulbs etc. Proteus Circuit of Turning on LED Arduino Code void setup() {   // put your setup code here, to run once: pinMode (7,OUTPUT);   // pin 7 (LED pin) configured as an output digitalWrite(7,HIGH);    // command to turn ON LED  } void loop() {   // put your main code here, to run repeatedly: }   Arduino Code for Turning ON/OFF LED Twice void setup() {   // put your setup code here, to run once: pinMode (7,OUTPUT);   // pin 7 (LED pin) configured as an output digitalWrite(7,HIGH);     // command to turn ON LED  delay(1000);                  // command for a 1 second delay digitalWrite(7,LOW);    // comm...

  GCE Advanced Level Past Questions   Technical and Vocational Education Examinations Electrical Power Systems EPS Power Electronics Specialty Name (Specialty Code) Electrical Power Systems EPS (F3) Subject Title   Power Electronics Paper Nº   2 Subject Code Nº 7235  1.  Control of a D.C motor          The circuit shown in figure 1, include the control and the power circuit of a DC motor to make the up and down movements of a system. All the OP-AMP and switches are ideal a)   Study of the control circuit (OA1; R’s and (AO2). i)       Give the operating mode of the operational amplifiers (OA1; R’s) and (AO2).                  ( 6 marks) ii)     ...