Telit Communications S.p.A. GE864Q2B ユーザーズマニュアル
GE864
GE864
GE864
GE864----QUAD V2 / GE864
QUAD V2 / GE864
QUAD V2 / GE864
QUAD V2 / GE864----DUAL V2 Hardware User Guide
DUAL V2 Hardware User Guide
DUAL V2 Hardware User Guide
DUAL V2 Hardware User Guide
1vv0300875 Rev.1 – 2010-03-29
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved.
Page 54 of 73
Example of Buzzer
’
s driving circuit
NOTE:
NOTE:
NOTE:
NOTE:
To correctly drive a buzzer, a driver must be provided; its characteristics depend on
the Buzzer and for them refer to your buzzer vendor.
the Buzzer and for them refer to your buzzer vendor.
11.7.
Magnetic Buzzer Concepts
11.7.1.
Short Description
A magnetic Buzzer is a sound-generating device with a coil located in the magnetic
circuit consisting of a permanent magnet, an iron core, a high permeable metal disk,
and a vibrating diaphragm.
circuit consisting of a permanent magnet, an iron core, a high permeable metal disk,
and a vibrating diaphragm.
Drawing of the Magnetic Buzzer
TR1
BCR141W
TR2
SMBT2907A
R1
4,7K
R2
1K
D1
D1N4148
C1
33pF
+
-
+V buzzer
GPIO7