User Manual
Lesson 6 Active buzzer
Overview
In this lesson, you will learn how to generate a sound with an active buzzer.
Component Required:
(1) x Elegoo Mega2560 R3
(1) x Active buzzer
(2) x F-M wires (Female to Male DuPont wires)
Component Introduction
BUZZER:
Electronic buzzers are DC-powered and equipped with an integrated circuit. They
are widely used in computers, printers, photocopiers, alarms, electronic toys,
automotive electronic devices, telephones, timers and other electronic products for
voice devices. Buzzers can be categorized as active and passive ones. Turn the pins
of two buzzers face up. The one with a green circuit board is a passive buzzer, while
the other enclosed with a black tape is an active one.
T
he
diff
ere
nc
e
be
twee
n the
tw
o is tha
t
an a
c
ti
ve
bu
zzer
has a buil
t
-in os
c
illatin
g
sour
ce,
so i
t
w
ill
gener
a
te
a sound
whe
n
e
l
ectr
ifi
e
d.
A
passi
ve
bu
zzer
do
e
s no
t
ha
ve
such a sour
ce
so i
t
w
ill no
t
tweet
if DC si
g
nals a
re
us
ed;
ins
te
a
d,
y
ou ne
e
d to us
e
squa
re
w
a
ve
s
w
hos
e
fre
quenc
y
is be
twee
n
2K
and
5K
to dri
ve
it. T
he ac
ti
ve
buz
zer
is of
te
n
m
o
re
e
x
pe
nsi
ve
t
han
the
passi
ve
o
ne bec
aus
e
of
m
ultipl
e
buil
t
-in os
c
illatin
g
circ
uits.
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