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- Módulos de detección de sonido de alta sensibilidad con sensor de micrófono para AR-duino PIC AVR
- Se puede utilizar para detectar la intensidad del sonido del ambiente
- Con salida analógica y salida de nivel de umbral
- Alta sensibilidad y alta eficiencia.
- Tiene dos salidas: AO, salida analógica, señal de voltaje de salida en tiempo real del micrófono
- Hacer, cuando la intensidad del sonido alcanza un cierto umbral, la señal de salida alta y baja
- Duradero y fiable de usar.
- Tiene agujero de tornillo de montaje de 3 mm.
- Utiliza fuente de alimentación de 5 V CC.
- Tiene luz indicadora de encendido.
- La salida del comparador es ligera
J. B.
Comentado en los Estados Unidos el 28 de enero de 2025
If you'd like to build a noise meter detecting intensity of noise, forget it.No matter what, this thing reads 5 to 7 analog input at all times, jumping around. Ok, no biggie, anything under 7, call it 0. Call anything under 7 the noise floor.But the rest of the world of noise levels is extremely spotty. A solid noise will sometimes create a spike about 25% or 50% the analog range of the sensor, but not usually for the entire time the noise is present. Usually the sensor spikes up at the beginning of sound, or sometimes misses it entirely.Provided are two serial plots. One is smoothed, the average of the last 10 samples. One is raw readings. Both are the same constant tone pointed directly at the microphone. Notice in the unsmoothed sample, you get spikes and you get noise floor, not much in between. And that's with one solid tone. Smoothing by averaging the last 10 samples isn't much better. These are pretty spotty for analog sensors. They are almost digital sensors with an analog pin.
Steve L.
Comentado en los Estados Unidos el 28 de enero de 2024
Initially when I tried one, I also thought they might be broken, but with a little investigation this proved not to be the case. As delivered, the adjustment of the potentiometer (variable resistor) is set so the module is continuously triggered. When triggered the analog readout of the speaker seems to be suppressed. Note that the potentiometer is a multi-turn variety, so it must be rotated counter clockwise several times before you find the triggering threshold and the second LED goes off. Once you find this point, it does, indeed act as a reasonably sensitive digital sound level sensor. Below the threshold you can, indeed, read the analog output of the microphone. However, it is unamplified, and as reported, there is quite a lot of noise. Having said that the noise seems to be predominantly ~100 mhz, so it would be pretty trivial to filter it out effectively with a passive low pass filter. If what you're after is a digital sensor of noise level, this is a solid choice. It seems effective, and has a rapid trigger. If you're after an amplified analog microphone or somesuch, this isn't it.
Richard Boyle
Comentado en los Estados Unidos el 20 de junio de 2020
These seem to work fine when connected to an Arduino UNO, however, I purchased them hoping to use with an ESP8266 and it seems that there is just too much noise for anything to really be picked up, you had to be basically inside the microphone. I was powering this from a 5v supply (with a common ground to the ESP8266) to ensure it was getting the correct power. I tested by connecting to an Arduino Uno and they seemed to work fine, not the best out there, but did what they were supposed to.
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