Microsoft LPF-00004 Manual do Operador Página 81

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MAKING YOUR OWN ADAPTER OR ACTIVE PROBE Page 63
C
YBER
A
MP
380, COPYRIGHT MARCH 2002, AXON INSTRUMENTS, INC.
Panel Switch
Foot Switch
C2 C1
R1
100
5.000 V
(
4
)
INPUT
(
1
)
ANALOG GROUND
(
10
)
0.1
µ
1
µ
Figure 30. Switch interface. This circuit can be used to interface a change-over switch to the CyberAmp.
Such switches would typically be used to activate one of the digital inputs or a counter input in the data
acquisition system. Capacitor C2 eliminates false triggering due to contact bounce. Resistor R1 limits the
transient current drawn from the 5.000 V supply. Capacitor C1 stores the charge required to rapidly step C2 to
at least 4.55 V.
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