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Auto Sensing Audio Switches | Products & Suppliers ...
https://www.globalspec.com/industrial-directory/auto_sensing_audio_switches
Supplier: ValueTronics International, Inc. Description: Requirements Input Power: Universal ( Auto Sense and Switch) Width 425 mm (16.73 in); Height 133 mm (5.23 in); Length 457 mm (17.99 in) The Audio Precision SYS-2322 contains an analog signal generator consisting of an ultra-low distortion analog sinewave generator and. Supplier Catalog.
Audio Signal Detector/Switch Circuit - DiscoverCircuits.com
http://www.discovercircuits.com/H-Corner/audiosignal%20detector%20switch.htm
transistor switch when it detects at least 50mv peak to peak of an audio signal. The switch could be used to turn on a relay, routing the signal to where it is needed. A single 3v lithium cell will power the electronic circuit for about 5 years.
Switching Controlled by an Audio Signal | Radio Design Labs
https://www.rdlnet.com/blog/tips/switching-controlled-by-an-audio-signal/
The threshold sensitivity can be adjusted to trigger on signals between -30 dBu and 0 dBu. When the audio signal drops below the set threshold, an adjustable delay timer is triggered prior to de-actuating the relay contacts. The adjustable delay duration is the major difference between the two relays: ST-ACR1 Adjustable delay ½ second to 5 seconds
Audio Signal Switch - Switch - AliExpress
https://www.aliexpress.com/popular/audio-signal-switch.html
audio signal switch passive. UGREEN Switch Bluetooth 5.0 Audio 3.5mm Transmitter Adapter for Receiver Nintendo Switch APTX LL Wireless Transmitter. US $19.98. 134 sold. 4.8. Free Shipping. Ugreen Official Store. UGREEN HDMI Switch for Xiaomi Mi Box 3 In 1 Out HDMI Switcher 4K/30Hz for TV box PS4 Switch HDMI 4K with Controller HDMI Cable. US $16.67.
Auto sensing on/off switch | diyAudio
https://www.diyaudio.com/community/threads/auto-sensing-on-off-switch.334994/
I am looking for a switch that senses the line-level audio signal, switches on an amplifier when there is a signal, and turns the amplifier off when there is no signal for a while. Yes, there is the Rod Elliot #38 circuit, which does exactly that ("Signal Detecting Auto Power-On Unit"). However, I am too lazy to make a PCB for it.
Audio Detector Switch - EasyEDA
https://easyeda.com/guest/Audio_Detector_Switch-yYuM4mfxP
Two similar circuits: A) Automatic input selector: If input A is connected to the output, if input B has audio signal the circuit switches to input B. B) Detect audio signal to switch relay on and after some time off again when the music has stopped.
Amazon.com: AudioSource Analog Amplifier, Stereo …
https://www.amazon.com/Audio-Source-AMP100VS-Channel-Amplifier/dp/B00ZSEFU94
Auto Signal Sensing Power On. Dual Auto-Switching Inputs. Independent level and balance controls. Rear mounted treble and bass controls. Front panel diagnostic LEDS. AUTOMATICALLY KNOWS WHEN TO TURN ON: This amplifier is audio sensing, meaning it automatically turns on when you start your system.
A cheap simple solution for auto turning on/off amps and ...
https://thedigitallifestyle.com/w/index.php/2011/02/15/a-cheap-simple-solution-for-auto-turning-onoff-amps-and-other-devices-and-peripherals/
Possible options were an audio signal sensing amp that can automatically turn itself on when an audio signal is detected. However these types of amps are more difficult to source and can be more expensive, plus I’ve heard that on some of them if you are listening to music too quietly they can turn off when you don’t want them to.
Automatic RCA audio switch? - Audioholics Home …
https://forums.audioholics.com/forums/threads/automatic-rca-audio-switch.114160/
It seems that would do it but wonder how well it works for your purposes with the way it reacts to signal sensing when the B signal comes thru (in the product description). It also doesn't specify what the signal strength needs to be but if it works with typical audio line levels then it should be okay.
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