Back in 2018, we covered [Igor’s] Easy-SDR project that aimed to provide open hardware extensions for the chap RTL-SDR receivers. If you haven’t been there for a while, it’s worth a look as ...

After he retired, he decided to act on this fascination and built a simple bat detector. The simple bat detector uses frequency division to lower the bat’s chirping to a frequency we can hear.

You already paid. You’re getting the blue one too.’ ” Blissfully ignorant, but soon to learn the disturbing truth, she went along with it. A few weeks later when her son started fourth grade and his ...