Light LED while Sound is Playing
The CFSound-IV has a PTT (Push-to-Talk) relay that can be optionally activated while a sound is
playing. The PTT relay contacts are available on the MAIN connector and can be thought of as a switch that
can be closed when a sound is playing.
The LED is wired as shown – note that the PTT contacts are simply wired in series with the LED and it’s
power supply:
G
R
O
U
N
D
1
0
V
-
1
8
V
D
C
P
T
T
C
o
n
ta
c
t N
.O
.
P
T
T
C
o
n
ta
c
t C
O
M
In
p
u
t C
o
n
ta
c
t 2
6
In
p
u
t C
o
n
ta
c
t 2
5
R
ig
h
t S
p
e
a
k
e
r
+
L
e
ft
S
p
e
a
k
e
r
-
L
e
ft
S
p
e
a
k
e
r
+
R
ig
h
t S
p
e
a
k
e
r
-
1
2
3
4
5
6
7
8
9
10
Power
Supply
+
-
MAIN
1K
Name your sound 19CS.WAV and now whenever the sound is playing, the LED will be lit.
