This electronic mosquito repellent circuit is easy to build but is kind of hard to adjust on the exact sound frequency which will reppel the mosquitoes. With frequencies between 2 KHz and 2.5 KHz ...

LIV is not a mosquito-killing system—you’ll need zappers and poisons for that—but rather a repeller technology. It works based on a chemical called metofluthrin, which gives off a vapor that ...