Bayfield resident Erik Carlson noticed something peculiar when reviewing the footage of his front porch camera from the night of Dec. 30. There was a strange light beaming into the sky, and every few ...

Designed specifically for laser-beam profiling and able to capture 190 to 1,550-nm wavelengths in CW and pulsed mode, the USB 2.0-compatible SP620U silicon CCD camera has 1.9-Mpixel resolution, while ...

This circuit is presented as an alternative to the IR beam break detector featured in the June 2009 issue (Silicon Chip). In order to make it relatively insensitive to ambient light, it uses a ...