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transistors - audio controlled relay circuit - Electrical ...
https://electronics.stackexchange.com/questions/4742/audio-controlled-relay-circuit
audio controlled relay circuit. Ask Question Asked 11 years, 3 months ago. Active 10 years, 8 months ago. Viewed 4k times 3 1 \$\begingroup\$ I need a circuit …
Electronic – audio controlled relay circuit – iTecTec
https://itectec.com/electrical/electronic-audio-controlled-relay-circuit/
Electronic – audio controlled relay circuit. audio relay transistors. 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.
Audio Amplifier Output Relay Delay Circuit Diagram
http://www.learningelectronics.net/circuits/audio-amplifier-output-relay-delay.html
The purpose of this circuit is to control the relay which turns on the speaker output relay in the audio amplifier. The idea of the circuit is wait around 5 seconds ofter the power up until the speakers are switched to the amplifier output to avoid annoying "thump" sound from the speakers.
Sound activated relay - CircuitLib - Electronic Circuits
https://circuitlib.com/index.php/projects/product/71-sound-activated-relay/category_pathway-18
Sound activated relay 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 is based on a R/S latch, built from NOR gates.
Audio Activated Delay Switch Using Transistors - Circuits …
https://circuits-diy.com/audio-activated-delay-switch-using-transistors-diy-project/
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.
Muting Circuits For Audio
https://www.sound-au.com/articles/muting.html
The relay is wired so that the normally closed contacts simply short the signal to earth (ground). Until the relay is activated, the signal is muted, and because the contact resistance is typically only a few milliohms, there's no need to add resistance to the circuit that provides the audio signal (typically an opamp).
Audio Delay Line Circuit - For Echo, Reverb Effects ...
https://www.homemade-circuits.com/audio-delay-line-circuit-enhance-your-listening-experience/
The power supply circuit for the audio delay line is shown in the above image. It is built around a voltage regulator, IC6, to crank out the primary 15 volt supply output. The shift register involves sources of each +1 and +20 volts.
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...
where to place mute circuit? | diyAudio
https://www.diyaudio.com/community/threads/where-to-place-mute-circuit.323336/
jimmy audio. Where is the best place to implement a relay based mute circuit? right at the input jacks before the summing amps/volume control or after the summing amps/volume control right before the amps (6x)? Relays (3x dpst) will short the inputs to ground. Kinda worried about shorting the op amps outputs (JRC 2068dd) to ground.
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