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Audio Activated Delay Switch Using Transistors - DIY Project

    https://circuits-diy.com/audio-activated-delay-switch-using-transistors-diy-project/#:~:text=Audio%20activated%20delay%20switch%20is%20a%20circuit%20that,in%20volume%20when%20any%20advertisement%20or%20song%20plays.
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Audio Activated Relay Switch Output [PIC-125]

    https://www.pic-control.com/audio-activated-relay-switch-output-pic-125/
    This device detects audio from your 3.5mm stereo socket and uses the audio as a means to control a relay output. Simple to use. Simply plug in the USB to supply this converter with power. Plug in your audio jack for the audio sound input. …

Audio Activated Relay Switch Output – IOanyThing

    https://ioanything.myshopify.com/products/audio-activated-relay-switch-output
    Detects audio and trigger an output relay. You can then interface the output relay to an external system. Simple to use. Simply plug in the USB to supply this converter with power. Plug in your audio jack for the audio sound input. When sound is detected from your audio jack, the relay will be activated. Application Convert sound into a light indicator.

Sound activated relay - CircuitLib

    https://circuitlib.com/index.php/projects/product/71-sound-activated-relay/category_pathway-18
    The Sound Activated Relay can be used for turning on or off the lights in your house, for starting a voice recorder, for opening doors, activating sirens or other electric equipment with the sound of your voice, with a clap, a whistle or noise. The circuit …

STICK-ON® Voice Activated Relay | Audio System Controllers ...

    https://buildings.honeywell.com/us/en/products/by-category/control-panels/fire-control-panels/audio-system-controllers/stick-on-voice-activated-relay
    STICK-ON® Voice Activated Relays are designed, built and rated for continuous duty in professional A/V systems. They have switching controlled by Voice Signal from Mic or Line Level Signals. The unbalanced output from the STM-1 can be used to trigger the ST-VOX1, while the STM-1 balanced output is used for the audio feed. Features & Benefits:

Voice Activated Relay VAR1 Model VAR1 - Voice Activated ...

    https://www.bogen.com/product/specialty-electronics/voice-activated-relay-var1
    Model VAR1 - Voice Activated Relay. The VAR1 is a relay device that monitors audio activity over a wide range of input voltages and operates two sets of C-Form relay contacts in response to detected activity. The VAR1 can be used to detect voltages as low as signals directly from a microphone or as high as signals from 70V speaker systems.

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