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Audio Controlled Relay – Model G623AUDIO | Lencore
https://www.lencore.com/documentation/data-sheets/audio-controlled-relay-g623audio/
The Audio Controlled Relay is designed for quick convenient installation, and reliable operation in a variety of control applications. The G623AUDIO is designed to switch on line level sources and its relatively short release delay time makes it the optimum choice for voice applications.
Amazon.com: RDL ST-ACR1 Line-Level Audio Controlled …
https://www.amazon.com/ST-ACR1-Line-Level-Audio-Controlled-Relay/dp/B004ZKY0FC
Taidacent 24V Audio Signal Trigger Relay Module Sound Sensor Sound Delay Input Audio Signal Relay Control Switch Performance Stable. 1 offer from $35.35. HiLetgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger.
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
Relays for Switching Audio Signals
http://www.geofex.com/Article_Folders/relays/relays_for_switching_audio_signa.htm
The coil is only used to control the relay, not to conduct signal currents. If you think of the coil and the iron core it is wound on as the electromagnet, and imagine that the swinging arm of the switch is also made of iron, you can see that when the coil is energized, the electromagnet develops enough magnetic pull to make the moving arm plop ...
transistors - audio controlled relay circuit - Electrical ...
https://electronics.stackexchange.com/questions/4742/audio-controlled-relay-circuit
I need a circuit that fires a relay when it detects audio pulses from one channel of an mp3 player. I'm going to record audio pulses in sync with the music to control a motor for mouth movement. Its been 20 years since I've done this kind of stuff, so I need some help with this design.
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