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Audio Combiner

S

Sarah and Rob

Jan 1, 1970
0
Hello everyone:

I'm looking for a schematic for a audio combiner that has a mute or cut-out
that mutes the non priority input when the priority input has voltage. I
want to make an audio combiner to listen to music from a CD Player in a
aircraft with my headset. I want to have the signal from the CD player cut
out when I have a transmission coming in over the aircraft radio.

Thanks in advance to anyone that can help.

Rob Gagné

[email protected]
 
G

Genome

Jan 1, 1970
0
Sarah and Rob said:
Hello everyone:

I'm looking for a schematic for a audio combiner that has a mute or cut-out
that mutes the non priority input when the priority input has voltage. I
want to make an audio combiner to listen to music from a CD Player in a
aircraft with my headset. I want to have the signal from the CD player cut
out when I have a transmission coming in over the aircraft radio.

Thanks in advance to anyone that can help.

Rob Gagné

[email protected]

**** Off!

DNA
 
G

GPG

Jan 1, 1970
0
Sarah and Rob said:
Hello everyone:

I'm looking for a schematic for a audio combiner that has a mute or cut-out
that mutes the non priority input when the priority input has voltage. I
want to make an audio combiner to listen to music from a CD Player in a
aircraft with my headset. I want to have the signal from the CD player cut
out when I have a transmission coming in over the aircraft radio.

Thanks in advance to anyone that can help.

Rob Gagné

[email protected]

The radio should have a squelch output that can be used for this.
 
F

Fred Bloggs

Jan 1, 1970
0
Sarah said:
Hello everyone:

I'm looking for a schematic for a audio combiner that has a mute or cut-out
that mutes the non priority input when the priority input has voltage. I
want to make an audio combiner to listen to music from a CD Player in a
aircraft with my headset. I want to have the signal from the CD player cut
out when I have a transmission coming in over the aircraft radio.

Thanks in advance to anyone that can help.

Rob Gagné

[email protected]

You want an adaptation of something traditionally called a VOX or
Voice-Operated-Switch. The "voice" activation will be from your primary
audio channel, and the switch will turn off the entertainment audio and
connect the primary channel to the headset- this can be done with a reed
relay or analog mux. A sample schematic using the MC2830 is shown here:
http://www.electronics-lab.com/projects/sensors/025/ - looks like the
2803 is obsolete. A simple starting point would be this kit- made in
your neck of the woods:
http://www.canakit.com/Default.asp?...tp://www.canakit.com/Contents/Items/CK257.asp

You adapt this by 1) remove that MIC and replace with attenuator
driven by your primary audio channel, 2) remove that big power hungry
relay and replace with transistor open collector output, 3) add daughter
board with 1) two input jacks for primary and entertainment audio, 2)
reed relay or analog mux, 3) output jack for headset, 4) power supply
terminals. Line this daughterboard up with the corner holes on the kit
board and mount- drop in a box. The plan would basically look like this:
Please view in a fixed-width font such as Courier.


ATTENUATOR

PRIMARY >---+-/\/\--+--/\/\---||---> TO MIC INPUT VOX
AUDIO CH | |
| /
| \
| /
| \
| |
GND----------------+---------------GND
|
12VDC----------------------+---------12VDC
| |
| |
| REED RELAY |
+--- o |
o--------------> HEADSET
|/ |
SECONDARY>--------o - |
AUDIO CH |
------ |
+---UUUUUU--+
| |
+-----|>|---+
|
+--------------------< SW OUTPUT FROM VOX
 
F

Fred Bloggs

Jan 1, 1970
0
Fred Bloggs wrote:

Maybe include an override switch like so:
Please view in a fixed-width font such as Courier.


ATTENUATOR

PRIMARY >---+-/\/\--+--/\/\---||---> TO MIC INPUT VOX
AUDIO CH | |
| /
| \
| /
| \
| |
GND----------------+---------------GND
|
12VDC----------------------+---------12VDC
| |
| |
| |
| |
| |
| |
+-------------|-------+
| | |
| | |
| REED RELAY | o
+--- o |
o-------------o<--o--> HEADSET
|/ | OVERRIDE
SECONDARY>--------o - | SW
AUDIO CH |
------ |
+---UUUUUU--+
| |
+-----|>|---+
|
+--------------------< SW OUTPUT FROM VOX
 
S

Sarah and Rob

Jan 1, 1970
0
Genome:

Get a life. That was a simple question. Maybe it was posted on the wrong
newsgroup. Feel important now?

Rob
 
J

James Meyer

Jan 1, 1970
0
that wasn't nice?

It's hard to be nice when you don't get enough sleep because your
neighbors are electrocuting you with laser rays shot through your head in the
middle of the night.

Jim
 
M

Mr Hard Man Gay

Jan 1, 1970
0
James Meyer said:
It's hard to be nice when you don't get enough sleep because your
neighbors are electrocuting you with laser rays shot through your head in the
middle of the night.

Jim

It's even worse when you have to spend all the night zapping the target and
it keeps tossing and turning in its bed.

I wanna know what dipfreud dude is doing listening to CD's when he should be
flying the plane.

NURF
 
G

Glenn Gundlach

Jan 1, 1970
0
Sarah and Rob said:
Genome:

Get a life. That was a simple question. Maybe it was posted on the wrong
newsgroup. Feel important now?

Rob

Perhaps so, but your initial comment raises eyebrows about you.
GG
 
G

Glenn Gundlach

Jan 1, 1970
0
Sarah and Rob said:
Genome:

Get a life. That was a simple question. Maybe it was posted on the wrong
newsgroup. Feel important now?

Rob

Apologies to "Sarah and Rob". The response was aimed at Genome.
GG
 
J

James Meyer

Jan 1, 1970
0
It's even worse when you have to spend all the night zapping the target and
it keeps tossing and turning in its bed.

I wanna know what dipfreud dude is doing listening to CD's when he should be
flying the plane.

NURF

Some of us are competent enough to do both. Unlike others who can't
walk and chew gum at the same time. Take the President.... please!

Jim
 
S

Sarah and Rob

Jan 1, 1970
0
--
Rob Gagné > >>I wanna know what dipfreud dude is doing listening to CD's
when he should
Okay- so you're probably this "Gundlach" turd posting as "Sarah and Rob"
to hawk your cheap-as-sh_t fringe market product. Genome's response is
right on target as per usual then- you can bank on his insight!


Nice try but I'm just a working stiff trying to save myself some money by
making my own and not coughing up the 170USD they want for this, and I will
agree with you, cheap-as-sh_t product.
 
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