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Lesson 17 Thermometer
Overview
In thi s l esson, you will learn how t o u se LCD display to show the va l ue of current
temperature.
Components Required
Name Qty Name Qty
UNO R3 or MEGA 2560 1 10KΩ Resistor 1
LCD1602 Module 1 Potentiometer 1
Thermistor 1 Male to Male DuPont Wire 18
830 Tie-points Breadboard 1
Component Introduction
A thermistor is a type of resistor whose resistance varies according to the
temperature. When the temperature increases, the thermistor resistance decreases;
when the temperature decreases, the thermistor resistance increases. There are two
kinds of thermistors, NTC (negative temperature coefficient) and PTC (positive temperature
coefficient). In general, NTC is widely used for temperature measurement. PTC is used as
resettable fuses.
Connection Schematic
VSS
VDD
V0
RS
RW
E
D0
D1
D2
D3
D4
D5
D6
D7
A
K
AREF
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
GND
SDA
SCL/RESET
3V3
5V
A0
A1
A2
A3
A4
A5
GND1
GND2
VIN
Analog Input
Digi tal Input/Output
ARDUINO-NOHOLE
1
2
3
10K
LCD1602
Potenti
ometer
UNO R3/
Mega 2560
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