V1 auto mute circuit......anyone??

[mswlogo]

You don't need the remote audio adapter, as you can tap the audio directly from the RJ11, and you can ground-out the mute input momentarily to mute the V1.

Plus you could use perfboard if you're building a one-off, saving the expense of having a PCB made up.

Sensing the audio would work, but if you really wanted to do it right, you could use a microcontroller to monitor the CD data stream, and then you can time your automute based on when the alert begins, and even delay the muting if more bogeys happen, or whatever.

If you really wanted to get sophisticated, and are using the remote audio adapter, you could gain complete control over the mute/unmute by intercepting the data stream and then changing the mute bits before passing them on to the remote audio adapter. Then, you could automute one bogey, but then unmute when another bogey kicks in and re-mute after so many seconds. Or automute K band but not Ka, for example. Or make it so when you press the button once, it mutes, and you press it again it unmutes, like Whistler does.

I would use a CD to start since it can "parse" the data stream for you.

All you have to do is look at the lowest signal strength LED to be ON for X amount of time and fire mute until lowest LED is OFF for Y amount of time. All within the CD. Done.

If you want to get cool with the bogey count it gets more complicated. But you could unmute any time the bogey value changes and reset the timer and watch the lowest LED and automute again.

Microcontroller would be way overkill.

[swarga]

I would use a CD to start since it can "parse" the data stream for you.

Microcontroller would be way overkill.

Actually, the right micro could well be cheaper than buying a concealed display and a bunch of discrete components. A PIC development board is ~$15, and the PIC micro to go in it is another $4. That and a couple of resistors would be all you'd need. However, none of that does any good if you don't know how to program it.

[mswlogo]

I would use a CD to start since it can "parse" the data stream for you.

Microcontroller would be way overkill.

Actually, the right micro could well be cheaper than buying a concealed display and a bunch of discrete components. A PIC development board is ~$15, and the PIC micro to go in it is another $4. That and a couple of resistors would be all you'd need. However, none of that does any good if you don't know how to program it.

exactly, not to mention the time involved programing it if you knew how.

Plus CD gives you something to put it in.

not to mention most folks have a cd

[yamaha1]

In order to use the RJ11 port to intercept the audio data for use with a micro controller, I would need a way to "read" the data stream that the V1 is outputting during an alert so the micro controller knows what to look for and how to react.....correct?

[kpatz]

If you're intercepting the audio, you only have to listen for a signal (series of high-low pulses). The audio is carried on one of the 4 RJ11 pins, the same one the mute button connects to IIRC.

If you want to intercept the data stream, you'd monitor a different pin, and would have to interpret the data. V1 Serial Protocol. Looking at this data, you can detect the on/off status of each LED on the CD as well as the current mute status of the audio.

[yamaha1]

If you're intercepting the audio, you only have to listen for a signal (series of high-low pulses). The audio is carried on one of the 4 RJ11 pins, the same one the mute button connects to IIRC.

If you want to intercept the data stream, you'd monitor a different pin, and would have to interpret the data. V1 Serial Protocol. Looking at this data, you can detect the on/off status of each LED on the CD as well as the current mute status of the audio.

Now we are getting somewhere!

By the looking at this, it would make programming a microchip much easier....and the possibilities would be endless.

I assume the circuit shown in the PDF there is needed to properly communicate with the microchip....that's simple enough.

Next question:
Does the audio adapter use the audio stream off the mute wire for its audio alert information, or is it getting it from the data stream wire?

I'm wondering because if it is getting it's info from the data wire that would make this relatively simple. Adding the microchip between the V1 and audio adapter to alter one bit in the data stream (Muted or not) would effectively do what I'm looking for.

[kpatz]

Next question:
Does the audio adapter use the audio stream off the mute wire for its audio alert information, or is it getting it from the data stream wire?

The audio comes from the mute wire. The only thing the audio adapter uses the data stream for is to determine whether to play at normal or muted volume, by checking the "loud" bit in the data stream.

For your auto-mute you would monitor the stream for alerts (e.g. strength LEDs and/or band indicator LEDs going on), and after a period of time, trigger the mute by momentarily grounding the mute wire through a resistor.

If you want to override the mute on the remote audio, you'd need to mirror the data stream on an output port with with the loud bit modified accordingly, and pass that to the audio adapter.

[swarga]

Next question:
Does the audio adapter use the audio stream off the mute wire for its audio alert information, or is it getting it from the data stream wire?

The audio adapter gets its data from the audio wire; it does not use the CD data wire.

[kpatz]

The audio adapter gets its data from the audio wire; it does not use the CD data wire.

It gets the mute info from the CD data wire doesn't it? It needs to know whether to route the signal through the mute volume ring or not.

[mswlogo]

The audio adapter gets its data from the audio wire; it does not use the CD data wire.

It gets the mute info from the CD data wire doesn't it? It needs to know whether to route the signal through the mute volume ring or not.

It does use the CD data wire.

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