Difference between revisions of "Light Indicator"

Objective

Here we make a simple light indicator, which divides light value into three levels, that is, green, blue and red.

Principle

Equipment

Hardware Buildup

• Setup 1：Connect CoreUSB to your PC, open program examples, select the right board (Microduino-CoreUSB) and download program through serial port.

light_led

• Setup2：Connect the light-sensitive resistor to A0 pin of Sensorhub and the colored LED light to D6 pin.

• Setup5：Stack CoreUSB, Sensorhu and BM.

• Setup6：Connect the battery to BM.

Software Debuggin

Code description: One part to acquire sensor values and the other part to control LED brightness and color change according the values.

• Sensor pin description

#define PIN 6
Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);

#define Light_PIN A0

• Light intensity pre-set value and the light can be divided into three levels.

#define Light_value1 400
#define Light_value2 800

• Light detection

sensorValue = analogRead(Light_PIN);

• The colored LED will adjust color and brightness according to light intensity.

if (sensorValue < Light_value1)
    colorWipe(strip.Color(0, map(sensorValue, 10, 400, 0, 255), 0));
  else if (sensorValue >= Light_value1 && sensorValue < Light_value2)
    colorWipe(strip.Color(0, 0, map(sensorValue, 400, 800, 0, 255)));
  else if (Light_value2 >= 800)
    colorWipe(strip.Color(map(sensorValue, 800, 960, 0, 255), 0, 0));

Result

Change light intensity from weak to strong, you can see gree, blue and red in order.

Video