| Author |
Message |
Mike DeAngelis
Guest
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 Posted:
Mon Nov 28, 2005 5:35 pm Post subject:
Remote Turn-On |
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Hi,
Does anyone have a schematic, kit, or a complete product to sense a line
level audio signal and turn a remote power amplifier on? I have done all the
searches I can think of and have not found anything. These things can't be
that rare!!
Thanks...Mike DeAngelis
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Deefoo
Guest
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| Posted:
Mon Nov 28, 2005 5:35 pm Post subject:
Re: Remote Turn-On |
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"Mike DeAngelis" <mikey4@snet.net> wrote in message
news:ilFif.1998$4o7.404@newssvr24.news.prodigy.net...
| Quote: | Hi,
Does anyone have a schematic, kit, or a complete product to sense a
line
level audio signal and turn a remote power amplifier on? I have done all
the
searches I can think of and have not found anything. These things can't be
that rare!!
Thanks...Mike DeAngelis
|
Maybe you could use a VOX, a voice activated switch often used in CB and ham
radio.
-- DF |
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Peter Bennett
Guest
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| Posted:
Tue Nov 29, 2005 1:36 am Post subject:
Re: Remote Turn-On |
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On Mon, 28 Nov 2005 15:27:10 GMT, "Mike DeAngelis" <mikey4@snet.net>
wrote:
| Quote: | Hi,
Does anyone have a schematic, kit, or a complete product to sense a line
level audio signal and turn a remote power amplifier on? I have done all the
searches I can think of and have not found anything. These things can't be
that rare!!
Thanks...Mike DeAngelis
|
In Amateur Radio, this would be called a "VOX circuit" (voice operated
transmit") Googling for that term will get lots of hits...
--
Peter Bennett VE7CEI
email: peterbb4 (at) interchange.ubc.ca
GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html
Newsgroup new user info: http://vancouver-webpages.com/nnq
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ehsjr
Guest
|
| Posted:
Tue Nov 29, 2005 9:35 am Post subject:
Re: Remote Turn-On |
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Mike DeAngelis wrote:
| Quote: | Hi,
Does anyone have a schematic, kit, or a complete product to sense a line
level audio signal and turn a remote power amplifier on? I have done all the
searches I can think of and have not found anything. These things can't be
that rare!!
Thanks...Mike DeAngelis
|
http://www.ramseyelectronics.com/
Put VS-1 in the search box.
It's a vox kit for $9.95. It can drive a 100 mA load, such as a relay,
which can turn the amplifier on/off.
Ed |
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Pooh Bear
Guest
|
| Posted:
Tue Nov 29, 2005 9:35 am Post subject:
Re: Remote Turn-On |
|
|
Mike DeAngelis wrote:
| Quote: | Hi,
Does anyone have a schematic, kit, or a complete product to sense a line
level audio signal and turn a remote power amplifier on? I have done all the
searches I can think of and have not found anything. These things can't be
that rare!!
|
I doubt many ppl need to do it.
Why not design your own ? It isn't that difficult.
Graham |
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Pooh Bear
Guest
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| Posted:
Tue Nov 29, 2005 9:35 am Post subject:
Re: Remote Turn-On |
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ehsjr wrote:
| Quote: | Mike DeAngelis wrote:
Hi,
Does anyone have a schematic, kit, or a complete product to sense a line
level audio signal and turn a remote power amplifier on? I have done all the
searches I can think of and have not found anything. These things can't be
that rare!!
Thanks...Mike DeAngelis
http://www.ramseyelectronics.com/
Put VS-1 in the search box.
It's a vox kit for $9.95. It can drive a 100 mA load, such as a relay,
which can turn the amplifier on/off.
|
100mA ! ???
You're kidding right ?
Graham |
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ehsjr
Guest
|
| Posted:
Wed Nov 30, 2005 1:35 am Post subject:
Re: Remote Turn-On |
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Pooh Bear wrote:
| Quote: |
ehsjr wrote:
Mike DeAngelis wrote:
Hi,
Does anyone have a schematic, kit, or a complete product to sense a line
level audio signal and turn a remote power amplifier on? I have done all the
searches I can think of and have not found anything. These things can't be
that rare!!
Thanks...Mike DeAngelis
http://www.ramseyelectronics.com/
Put VS-1 in the search box.
It's a vox kit for $9.95. It can drive a 100 mA load, such as a relay,
which can turn the amplifier on/off.
100mA ! ???
You're kidding right ?
Graham
|
No. What it is about a 100 mA load that engenders your question?
Ed |
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John Fields
Guest
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| Posted:
Thu Dec 01, 2005 1:00 am Post subject:
Re: Remote Turn-On |
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On Mon, 28 Nov 2005 15:27:10 GMT, "Mike DeAngelis" <mikey4@snet.net>
wrote:
| Quote: | Hi,
Does anyone have a schematic, kit, or a complete product to sense a line
level audio signal and turn a remote power amplifier on? I have done all the
searches I can think of and have not found anything. These things can't be
that rare!!
|
---
Do you want the amp to stay on until it's manually turned off later
or do you want it to turn off automatically some time after the
audio line goes silent?
--
John Fields
Professional Circuit Designer |
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Mike DeAngelis
Guest
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| Posted:
Fri Dec 02, 2005 5:35 pm Post subject:
Re: Remote Turn-On |
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The amp should turn on when an audio signal is present and turn off some
time (2 min.?) after the audio signal is not present.
...Mike
"John Fields" <jfields@austininstruments.com> wrote in message
news:fhtro15eu752u2klbdf06qa98u51tpkahc@4ax.com...
| Quote: | On Mon, 28 Nov 2005 15:27:10 GMT, "Mike DeAngelis" <mikey4@snet.net
wrote:
Hi,
Does anyone have a schematic, kit, or a complete product to sense a
line
level audio signal and turn a remote power amplifier on? I have done all
the
searches I can think of and have not found anything. These things can't
be
that rare!!
---
Do you want the amp to stay on until it's manually turned off later
or do you want it to turn off automatically some time after the
audio line goes silent?
--
John Fields
Professional Circuit Designer
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Jim Thompson
Guest
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| Posted:
Fri Dec 02, 2005 5:35 pm Post subject:
Re: Remote Turn-On |
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On 2 Dec 2005 07:07:30 -0800, samasonj@yahoo.com wrote:
Naaah! Your name is "Pest" ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food. |
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Guest
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| Posted:
Fri Dec 02, 2005 5:35 pm Post subject:
Re: Remote Turn-On |
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| teach me how my name is sam email samasonj@yahoo.com |
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John Fields
Guest
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| Posted:
Sat Dec 03, 2005 1:35 am Post subject:
Re: Remote Turn-On |
|
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On Fri, 02 Dec 2005 13:58:47 GMT, "Mike DeAngelis" <mikey4@snet.net>
wrote:
| Quote: | The amp should turn on when an audio signal is present and turn off some
time (2 min.?) after the audio signal is not present.
|
---
OK. (view in Courier)
V+
+5V>-+--------+------+---------------+-----+---+ |
| | | | | | | COM
| | |R1 | | | +------+ |
| | [10k] | | | |K | O
| | | | | [4K7][DIODE] [COIL]- |
| | | | | | | | O-> |
| | | CR1 | | | +------+ |
| +---|-[1M]-+-[<1N4148]-+ |Rd | | | NO
|Rth | | | | [10K]<-|+\ | D
[10K]<-+--|+\ | R2 | | | >-+---G
| | >----+--[510K]---+---|----|-/ LM393 S
VIN>---[10K]-|-/ LM393 |+ | | U1B |
| | U1A [240µF]| | |
| | C1| | | |
GND>-+--------+------------------+---+-----+---------+
Do you need a circuit description?
--
John Fields
Professional Circuit Designer |
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Rich Grise
Guest
|
| Posted:
Sat Dec 03, 2005 1:35 am Post subject:
Re: Remote Turn-On |
|
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On Fri, 02 Dec 2005 13:58:47 +0000, Mike DeAngelis wrote:
| Quote: | The amp should turn on when an audio signal is present and turn off some
time (2 min.?) after the audio signal is not present.
|
Yeah, like they said, a VOX. "Voice-operated transmission".
It seems to google up pretty good.
Have Fun!
Rich |
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John Fields
Guest
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| Posted:
Sat Dec 03, 2005 5:35 pm Post subject:
Re: Remote Turn-On |
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On Fri, 02 Dec 2005 17:22:08 -0600, John Fields
<jfields@austininstruments.com> wrote:
| Quote: | On Fri, 02 Dec 2005 13:58:47 GMT, "Mike DeAngelis" <mikey4@snet.net
wrote:
The amp should turn on when an audio signal is present and turn off some
time (2 min.?) after the audio signal is not present.
---
OK. (view in Courier)
V+
+5V>-+--------+------+---------------+-----+---+ |
| | | | | | | COM
| | |R1 | | | +------+ |
| | [10k] | | | |K | O
| | | | | [4K7][DIODE] [COIL]- |
| | | | | | | | O-> |
| | | CR1 | | | +------+ |
| +---|-[1M]-+-[<1N4148]-+ |Rd | | | NO
|Rth | | | | [10K]<-|+\ | D
[10K]<-+--|+\ | R2 | | | >-+---G
| | >----+--[510K]---+---|----|-/ LM393 S
VIN>---[10K]-|-/ LM393 |+ | | U1B |
| | U1A [240µF]| | |
| | C1| | | |
GND>-+--------+------------------+---+-----+---------+
Do you need a circuit description?
|
---
Oops... Discharging C1 through U1A's output transistor without some
sort of current limiting might hurt it. 200 ohms will limit the
current to about 20mA when C1 first starts to discharge and will
keep U1 safe.
V+
+5V>-+--------+------+---------------+-----+---+ |
| | |R1 | | | | COM
| | [10K] | | | +------+ |
| | | CR1 | | | |K | O
| | +-[<1N4148]-+ | | [4K7][DIODE] [COIL]- |
| | | | | | | | | O-> |
| | | [200] | | | +------+ |
| +---|-[1M]-+ | |Rd | | | NO
|Rth | | | | [10K]<-|+\ | D
[10K]<-+--|+\ | R2 | | | >-+---G
| | >----+--[510K]---+---|----|-/ LM393 S
VIN>---[10K]-|-/ LM393 |+ | | U1B |
| | U1A [240µF]| | |
| | C1| | | |
GND>-+--------+------------------+---+-----+---------+
--
John Fields
Professional Circuit Designer |
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ehsjr
Guest
|
| Posted:
Sat Dec 03, 2005 5:35 pm Post subject:
Re: Remote Turn-On |
|
|
John Fields wrote:
| Quote: | On Fri, 02 Dec 2005 13:58:47 GMT, "Mike DeAngelis" <mikey4@snet.net
wrote:
The amp should turn on when an audio signal is present and turn off some
time (2 min.?) after the audio signal is not present.
---
OK. (view in Courier)
V+
+5V>-+--------+------+---------------+-----+---+ |
| | | | | | | COM
| | |R1 | | | +------+ |
| | [10k] | | | |K | O
| | | | | [4K7][DIODE] [COIL]- |
| | | | | | | | O-> |
| | | CR1 | | | +------+ |
| +---|-[1M]-+-[<1N4148]-+ |Rd | | | NO
|Rth | | | | [10K]<-|+\ | D
[10K]<-+--|+\ | R2 | | | >-+---G
| | >----+--[510K]---+---|----|-/ LM393 S
VIN>---[10K]-|-/ LM393 |+ | | U1B |
| | U1A [240µF]| | |
| | C1| | | |
GND>-+--------+------------------+---+-----+---------+
Do you need a circuit description?
|
C(harge)R(apidly)1 - clever! I would not have thought
of it.
Ed |
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