This project refers to an Arduino sketch that implements a light indicator with the help of an external sensor (photoresistor) for the recognition of light, and a bar graph of many LEDs used as a rating indicator. Furthermore, if the indicator reaches the last rating which indicates that there is “perfect” light (the maximum light that the sensor can identify) then it plays a melody with a piezo speaker located in the system.
Tag Archive: photoresistor
Arduino: Light Indicator with multi-LED bar graph and light sensor.
October 25, 2012
Arduino: Light Indicator with multi-LED bar graph, light sensor and 8-bit shift register 74HC595.
June 29, 2010
This project refers to an Arduino sketch that implements a light indicator with the help of an external sensor (photoresistor) for the recognition of light (the sensor acts as input device for the Arduino), and a bar graph of many LEDs used as a rating indicator (the indicator functions as an output device for the Arduino).
In this project we use an 8-bit shift register (namely the 74HC595). This way we can drive 8 different LEDs in the output committing only three PINS of the Arduino.
This project refers to an Arduino sketch which with the help of an external light sensor (e.g: photoresistor) can control the rotation speed of a DC motor.
39.074208
21.824312
This project refers to an Arduino sketch which with the help of an external light sensor, as e.g. a photoresistor, one can move the position of a servo motor clockwise or counterclockwise.
39.074208
21.824312
Efstathios Chatzikyriakidis 