Long Range Mic Sensor


Anyone can suggest a microphone that can be use up to 100m wired away from board and serves as analog input to my arduino.



Depends on how you want to use it. Is it to actually listen to audio or detect audio?

If to listen, you would need an amplifier at the mic end to raise the level. This would involve a power source and shielded cable.

If simply to detect sound, you can use a sensing circuit and simply send a switched level. It would also need a power supply but would probably be ok over Cat5 if very little current drawn.


Which ever way you go you will want to amplify the signal as close to the source as possible because noise will be picked up on the transmission line and you don't want to amplify the noise that was picked up during transmission.