Mole repeller with Arduino

This is small Arduino project where a buzzer is turned on for some seconds regularly. Between each buzzing the Arduino was put in sleep mode. This was a proof of concept, where the idea is, that the vibration of the buzzer will keep the moles away. And as I was in a time pressure, I just put everything together from the things I found at home. The test was successful. The unit went on with a set of batteries for more than a month, I have used it all together for about 3 months. As the concept was proved (at least for "my" moles), on the next spring I know it is worth to investigate in some more professional equipment. ... https://www.youtube.com/watch?v=o1jfC5dxTyU