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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 …
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 …
Sound Level Meter Circuit - ElectroSchematics.com
https://www.electroschematics.com/sound-level-meter-circuit/
audio indicators Share this: This sound level meter circuit can be used to control the intensity of a sound recording or in a disco. It has 5 measurement domains between 70 and 120 dB; reading accuracy is 0.5 dB. Microphone M1 is used to receive the acoustic signal and is coupled to C1, C2, R1 and R2.
Audio level meter circuit - VU Level Meter
https://www.circuitstoday.com/audio-level-meter-circuit
3 Sound activated switch and Detector Circuit with PCB ...
https://www.eleccircuit.com/sound-activated-switch-circuit/
Audio Level Indicator Circuit Diagram using LM339 ...
https://electronicsarea.com/audio-level-indicator-using-lm339/
Audio level indicator using LM339. This audio level indicator using LM339 circuit is very interesting, since it allows us to visualize the intensity of the audio level by connecting this circuit to the input of a speaker. The LM339 integrated circuit has 4 comparators that operate completely independently, but share the same voltage source.
Muting Circuits For Audio
https://www.sound-au.com/articles/muting.html
The level shifter is needed and Q2 provides an open circuit to the base resistors (R7 and R8) when the signal is not muted. Figure 3 - Dual BJT Muting Circuit & Level Shifter I've shown a dual version above, and Q4 appears to be wired backwards. In fact, it is backwards, with the collector used as the emitter.
Audio Amplifier Circuit - UC Santa Barbara
https://web.ece.ucsb.edu/Faculty/rodwell/Classes/ece2c/labs/Lab%201a%20-%202C%202007.pdf
A list of Simple audio circuits and amplifiers for DIY(Do ...
https://www.circuitstoday.com/simple-audio-circuits
150 Watt amplifier circuit – This circuit is the most popular amplifier we have ever published. …
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