You don’t see them much anymore, but there was a time when any hobbyist who dealt with RF probably had a grid dip meter. The ...

If you have multiple microphones in known locations, and can determine the time a sound arrives at each one, you can actually determine the location that sound is coming from. This technique is ...

The Nikon GPS project is a compact and lightweight DIY module which adds GPS functionality to Nikon DSLR cameras. It adds the ability to record location data for each photo in the EXIF and later view ...