User's Manual

GL865 Hardware User Guide
1vv0300910 Rev.1 – 2011-07-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 59 of 79
TR1
BCR141W
TR2
SMBT2907A
R1
4,7K
R2
1K
D1
D1N4148
C1
33pF
+
-
+V buzzer
GPIO7
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.
11.7. Magnetic Buzzer Concepts
1.1.1 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.