Page 169 - Making PIC Microcontroller Instruments and Controllers

tYpEs oF sENsons rc3

Types of Sensors

lnexpensive sensors are readily available for most ofthe following:

I Humidity
I Gravity
r Level
I Acceleration
I Resistance
I Capacitance
I Voltage
I Frequency
I Magnetic field
I Hall effect sensor
! Pressure
I Altimeter
r Vacuum
I Distance
I Sonic
I Themal
I Infrared
I Temperature
I Light
I Chemical sensors
t P H
I Sound
I Noise
I Sound pressure
I Contour or roughness
r Speed
r RPM
I Position
I GPS
I Orienlation
: Gravity sensors for two and three axes

We will, of course, use only a couple of these sensors because our interest is not pri-
marily in the senso$ but in manipulating the information we getr?m the sensors, no
matter what lype ofsensors they are.In order to do that, we must leam how to effec-
tively connect to whatever is provided to us and provide outputs that can control the
devices we are intercsted in manipulating. One chapter in this book is devoted ro making
the connections on the input side, while one concems mai:ing the connections on the
output side. In the eight projects we will undertake, rhe following sensor interfacing prob
lens will be addressed: