19
Beeper
The EM2096 provides a pin (Buzz, PIN 9) on the host interface connector that provides a PWM output to
an external driver circuit for generating audible feedback to the user to indicate statuses like power up or
good read. The PWM output is not strong enough to drive a beeper, thus a beeper driver circuit is needed.
The following beeper driver circuit is provided for reference.
2N3904
Q8
AS903Q
LS1
1
2
R5
10R
R6 1K
R7
10K
VDD
BUZZ
BAT760
D2
Содержание NLS-EM2096
Страница 1: ...NLS EM2096 OEM Scan Engine Integration Guide...
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Страница 12: ...6 Vertical...
Страница 14: ...8 Side View Top View...
Страница 15: ...9 Mechanical Mounting Dimensions for Decoder Board Unit mm Front View Side View...