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Amazon.com : Taidacent 24V Audio Signal Trigger Relay ...
https://www.amazon.com/Taidacent-Signal-Trigger-Control-Performance/dp/B07TXGD4K2
Module function description: The module detects that there is an audio signal relay turned on, no audio signal is delayed, and the audio trigger signal is continuously received within the delay time. The relay is always on, the relay will not be disconnected and …
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
Amazon.com: RDL ST-ACR1 Line-Level Audio Controlled …
https://www.amazon.com/ST-ACR1-Line-Level-Audio-Controlled-Relay/dp/B004ZKY0FC
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 Product information
Relays for Switching Audio Signals
http://www.geofex.com/Article_Folders/relays/relays_for_switching_audio_signa.htm
Relays are some of the oldest switching parts available, butthey are misunderstood by many audio hackers. Here's a run down on the basicsand how to apply them. Relays are electro-magnetically activated switches. Literally,there is an electromagnet inside the relay, and energizing that electromagnetcauses the switch to change position by pulling the movable …
What's the simplest audio line-level signal sensor (on/off ...
https://www.electro-tech-online.com/threads/whats-the-simplest-audio-line-level-signal-sensor-on-off-relay-transistor-triac.84723/
To energize a relay, a tiny 5V one, with say a 250 Ω coil, will need 0.1watt. 5V ÷ 250 = 20mA. 5V x 0.02A = 0.1 W. If your audio signal can provide such power at the levels you want the relay to click on, and stay off under such level, fine, you can connect a relay at the audio as the 'simpler' way you want.
ST-ACR1 ‐ Line-Level Audio Controlled Relay - 0.5 to 5 s
https://rdlnet.com/product.php?page=130
ST-ACR1 Line-Level Audio Controlled Relay - 0.5 to 5 s ST-ACR1M Microphone Level Audio Controlled Relay - 0.5 to 5 s delay ST-ACR2 Line-Level Audio Controlled Relay - 5 to 50 s delay ST-CL2 Compressor/Limiter - Line Level ST-CX2 Two Band Active Line-level Crossover ST-CX2S Subwoofer Crossover Filter ST-DA3 Line Level Distribution Amplifier - 1x3
Circuit-Audio Signal Detector/SwitchHobby Corner
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.
Only Mechanical Relays Will Do For Automated Hi-Fi …
https://hackaday.com/2018/03/10/only-mechanical-relays-will-do-for-automated-hi-fi-audio-source-switching/
That is the philosophy that lies behind [Skrodahl]’s relay-based audio switching board, which boasts 5 high-quality relays each handling a stereo input, with their control passed either to a rotary...
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