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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.
Sound activated relay - CircuitLib - Electronic Circuits
https://circuitlib.com/index.php/projects/product/71-sound-activated-relay/category_pathway-18
Sound Activated Relay circuit (see electronic schematic) To capture the sounds, we use a microphone capsule and a small microphone preamplifier. The signal from the microphone is applied (through C1), to the non-inverting input (pin 3) of the IC1 operational amplifier. IC1 is used as a precision half-wave rectifier.
Audio Activated Delay Switch Using Transistors - DIY …
https://circuits-diy.com/audio-activated-delay-switch-using-transistors-diy-project/
4,432 views. Audio activated delay switch is a circuit that can activate a relay switch for a specific time period. For example, when we are listening to an FM radio station there’s a sudden increase in volume when any advertisement or song plays. But with the help of this circuit that sudden increment of volume can be muted for 15 seconds and if the volume is …
Sound Activated Relay - simplecircuitboards.com
http://simplecircuitboards.com/Spec%20Sheets/Sound%20Activated%20Relay.pdf
This board accepts audio input from any non-amplified sound source and when the volume reaches a certain level, it actuates a 10A relay. This relay can be used to switch another device (light bulb, etc.) on and off in sync with the volume of the input. There is an on-board potentiometer that is used to adjust the sensitivity to the incoming sound.
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