The Tripwire

// 02 The Tripwire
// The Maker's Book of Origins, chapter 02. Type it from page 22, or copy it from here.
// makernest.com/origins/02
// MakerNest Origins is a brand of Innointel Global Private Limited.

#include <MakerNestOrigins.h>
void setup() {
  machine.begin(2, "02|THE|TRIPWIRE");
  machine.homeShows(SHOW_A | SHOW_LINE);
  machine.useScreen(SCR_COLD_LINE);
  machine.useScreen(SCR_NORMAL_COLOUR);
  if (machine.settings.coldLine == NOT_SET)
    machine.edit(SCR_COLD_LINE);
}
void loop() {
  machine.update();
  if (machine.temperatureA() < machine.settings.coldLine)
    machine.ring(RED);
  else
    machine.ringNormal();
}

// MakerNest Origins · bench 02 · an LED that switches on below a number
// The light sensor on A0 gives a number. Below LINE, the LED on row 12 comes on.
// Open Tools, Serial Monitor (9600) to watch the number.

const int SENSOR_PIN = A0;   // light sensor and 10k resistor meet here
const int LED_PIN = 12;      // the LED's long leg is wired to row 12
const int LINE = 300;        // your number: below this, the LED comes on

void setup() {
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int light = analogRead(SENSOR_PIN);   // 0 is black dark, 1023 is very bright
  Serial.println(light);

  if (light < LINE) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }
  delay(500);
}