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Audio Signal Detector/Switch Circuit - DiscoverCircuits.com
http://www.discovercircuits.com/H-Corner/audiosignal%20detector%20switch.htm
The hobby circuit below will activate a 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.
2x1 Signal Sensing VGA & Stereo Audio Switcher
https://atlona.com/product/at-apc21a/
2×1 Signal Sensing VGA & Stereo Audio Switcher Atlona AT-APC21A is a high performance, signal sensing VGA switcher. Simply senses the presence of a video signal and automatically switches to the active VGA source to be routed to a display. The automatic selection of the active channel eliminates the need of manual control.
Audio Signal Switch - Switch - AliExpress
https://www.aliexpress.com/popular/audio-signal-switch.html
video signal switch. z800 signal switch. led relay turn signal suzuki. genki audio switch. 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.
Amazon.com: RDL ST-ACR1 Line-Level Audio Controlled …
https://www.amazon.com/ST-ACR1-Line-Level-Audio-Controlled-Relay/dp/B004ZKY0FC
Two multiturn trimmers are provided. The SENS potentiometer adjusts the audio input sensitivity. A threshold LED facilitates accurate adjustment. The module can be set to trigger on signals between 30 dBu and 0 dBu. The DELAY control sets the time required for the relay to release when the audio drops below the threshold. - Power Supply Not Included
Audio signal sensing switch for car stereo | Electronics ...
https://www.electro-tech-online.com/threads/audio-signal-sensing-switch-for-car-stereo.40928/
Audio signal sensing switch for car stereo. Thread starter Lost Dog; Start date Jul 27, 2008; Status Not open for further replies. L. Lost Dog New Member. Jul 27, 2008 #1 Hello all, I'm new to all of this but I figure I have to start somewhere. I have no problems pulling out a soldering iron and following directions but I don't have the ...
Switching Controlled by an Audio Signal | Radio Design Labs
https://www.rdlnet.com/blog/tips/switching-controlled-by-an-audio-signal/
RDL ST-ACR Series Audio Controlled Relays are used in any application where an audio signal must be used to create either a relay closure or Open-Collector output to control another piece of equipment or a circuit. Common applications include: Juke Box overrides Background Music AN-2024; Silence or “Dead Air” Sensor in broadcast environments
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.
Auto-sensing HDMI Switchers - HDTV Supply
https://www.hdtvsupply.com/hdswau.html
These auto sensing HDMI switchers have the latest audio video technology built in to auto detect active input source signals and automatically switch the active input to the output Unlike other switchers these switchers do not require human interface Once a signal goes away the switcher will automatically change to the other input NOTE A few devices like some DVR s cable satellite …
Automatic RCA audio switch? - Audioholics Home …
https://forums.audioholics.com/forums/threads/automatic-rca-audio-switch.114160/
Something that ducks one audio signal when another is present, then returns to the other signal after the second one goes away. This is often used in paging systems with background music. Someone speaks into a mic, the music cuts out. They stop talking and the music cuts back in.
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