Photoresistor; Components Required - Uctronics Ultimate Starter Kit for Arduino Manual

Overview
In this lesson, you will learn how to measure light intensity using an Analog Input and use the
level of light to control the number of LEDs to be lit up.

Components Required

Name
UNO R3 or MEGA 2560
Breadboard
74HC595 IC
Photoresistor (Photocell)
Component Introduction
A photoresistor is a light-controlled variable resistor. The resistance of a
photoresistor decreases with the increasing incident light intensity; in other
words, it exhibits photoconductivity.
Connection Schematic
UNO R3/
Mega 2560
/RESET
3V3
5V
GND2
GND1
VIN
A0
A1
A2
A3
A4
A5
ARDUINO-NOHOLE
31
Lesson 9 Photoresistor
Qty
SCL
SDA
AREF
GND
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
10K
1
1 220Ω Resistor
1 10KΩ Resistor
1 DuPont Wire
74HC595
Q7' GND
MR Q7
SH_CP Q6
ST_CP Q5
OE Q4
DS Q3
Q0 Q2
VCC Q1
Name
LED
220R
220R
220R
220R
220R
220R
220R
220R
Qty
8
8
1
19