3Pcs High Sensitivity Microphone Sensor AVR PIC Sound Detection Module for Arduino

Arrived next day as advertised and already have my lights turn on just like the old Clapper. Now what to do with the other 2?...

As other people here have recounted, the analog input from this device isn't really useful. You can build a clapper out of it with the digital input (or detect noise above ambient, aka "extreme" noise), but if you're looking to build some sort of VU-meter-ish thing, this is not for you. There is no setting on its dial that defeats its poor signal to noise properties. In practice, if you do try to build some VU-meter-ish thing out of it based on ambient noise, you will see either no change in its analog signal, or minimum change in its analog signal even when you bang on its mic with a screwdriver.This isn't a knock on this product, I bought it aware. It is still a good little digital noise detector.

Probably would not buy again !! As others have mentioned, the pot on these are almost useless. Unable to adjust for sound sensitivity to activate the sense led on all three. DO & AO did register but the distance on what the mic is able to pick up is VERY limited. I wound up purchasing the 3-pin (DO only) blue board sold here with a different style of pot and these worked as designed with much greater sensing range / distance.

When I received them, one of the three did not have the anti-static bag. This one turned out to be a dud. The other two work fine. The speaker does, however, face upwards and not outwards as the picture suggests. They are pretty easy to bend back but I'm afraid the little contacts can't take it and the whole thing will just snap. For 6 bucks they are fine and get the job done.

You have to adjust the (unmarked and unbounded) pot ~ a dozen rotations ccw to find a threshhold where the mic has *any* sensitivity at all (judging from the D0 LED). And that window of sensitivity is tiny (like several degrees of a rotation), and even in that window, the sensitivity (to me knocking on the table right next to the mic) is inconsistent at best. I cannot imagine an application for which you should consider this product.

If you're buying this hoping to capture a smooth analog reading of ambient audio level, you'll be disappointed. The readings are very inconsistent, and the signal noise ratio seems pretty bad. The digital threshold detection works alright, and that's all I really needed it for anyway, so I can't complain. Taking away stars since the microphone is so poorly connected to the unit that merely touching it will cause the connector wires to bend. It doesn't take more than once or twice, and it broke completely away. Reinforcing with hot glue is pretty much a necessity.

The analog out on these is entirely useless due to a ridiculously low signal:noise ratio.The digital out (triggered by sound level crossing threshold) requires such fine tuning of the onboard potentiometer that even the rebound of each turn is enough to move to and from "cannot hear a gunshot" to "always triggered" and then if you ever do get it dialed in, the slightest change in the voltage of the circuit (low battery or additional current draw, for example) and you have to retune it.

Good god this thing is noisy! I agree that the digital output is usable, but I need good analog levels and this board does not deliver.