/* ------------------------- Analog Start ----------------------- * * Hardware Setup- a voltage divider connected to analog pin A5: * 1) -Wire a photoresister between +5vdc and an empty row on the breadboard * 2) -Wire a 10k resistor between that same row on the breadboard to ground. * 3) -Jumper wire from that same row to the last pin on the chip (analog 5) * * -Note: This sketch introduces the map() function for scaling values *-------------------------------------------------------------------------*/ int a_in; // create variable for storing analog readings int sensorPin = A5; // variable for analog pin as A5 void setup() { Serial.begin(9600); // start serial port at 9600 bps: } void loop() { // read sensor, store in variable, print a_in = analogRead(sensorPin); // get 10 bit analog value a_in = map(a_in, 0, 1023, 0, 255); // scale it to 8 bits Serial.println(a_in); } |