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Audio Signal Detector/Switch Circuit - DiscoverCircuits.com
http://www.discovercircuits.com/H-Corner/audiosignal%20detector%20switch.htm
The hobby circuit below will activate a 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.
Sound Sensor Switch Circuit Using LM393N Dual …
https://circuits-diy.com/sound-sensor-switch-circuit-using-lm393n-dual-comparator-ic/
Sound Sensor Switch Circuit Using LM393N Dual Comparator IC Hardware Components. Circuit Diagram. Working Explanation. The heart of this circuit is an LM393N comparator IC. In this circuit, we have used only one out of...
Stereo Audio Switch Circuit - ElectroSchematics.com
https://www.electroschematics.com/stereo-switch/
switch This stereo audio switch circuit allows that with only one switch to select one of the four stereo channels. The internal switching is made posible with CMOS components. Each switch input includes a voltage divider to allow the switch to work in the linear zone of the characteristics, this ensures low audio signal distorsions.
Dual Input Audio Switching Circuit : 6 Steps (with ...
https://www.instructables.com/Dual-Input-Audio-Switching-Circuit/
Dual Input Audio Switching Circuit Step 1: Get Your Parts Together. Step 2: Prepare the Enclosure. Here we are going to drill out some holes so you can mount the audio sockets and the... Step 3: Wire Up the Switch and Audio Sockets. I recommend soldering wires to …
Sensitive Audio Detector | AC Circuits | Electronics Textbook
https://www.allaboutcircuits.com/textbook/experiments/chpt-4/sensitive-audio-detector/
Detectors are intended to be used for balancing bridge measurement circuits, potentiometric (null-balance) voltmeter circuits, and detect extremely low-amplitude AC (“alternating current”) signals in the audio frequency range. It is a valuable piece of test equipment, especially for the low-budget experimenter without an oscilloscope.
Audio sensing switch | Electronics Forum (Circuits ...
https://www.electro-tech-online.com/threads/audio-sensing-switch.11914/
I am trying to make a switch to activate the mute on my car stereo with the line output of my pda. I have a navigation program on the pda that warns of upcoming turns. I have tel/nav line in pos and neg and a GROUND activated mute connections on my head unit. When the mute line is grounded, the...
Audio Detector Switch - EasyEDA
https://easyeda.com/guest/Audio_Detector_Switch-yYuM4mfxP
Description. Two similar circuits: A) Automatic input selector: If input A is connected to the output, if input B has audio signal the circuit switches to input B. B) Detect audio signal to switch relay on and after some time off again when the music has stopped.
Auto sensing on/off switch | diyAudio
https://www.diyaudio.com/community/threads/auto-sensing-on-off-switch.334994/
I am looking for a switch that senses the line-level audio signal, switches on an amplifier when there is a signal, and turns the amplifier off when there is no signal for a while. Yes, there is the Rod Elliot #38 circuit, which does exactly that ("Signal Detecting Auto Power-On Unit"). However, I am too lazy to make a PCB for it.
Audio Switch Notes - Neat Circuits
https://www.neatcircuits.com/audiosw/index.html
The circuit below is an example of a simple audio switch: Values are not critical so experiment for best results. 2N2222 or any signal NPN transistor is used to invert the control logic if required. Note there is no power required This voltage can be from +5 to +15 volts. The circuit should mute sufficiently any audio from 15 hz to 20 khz.
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