I tried this thermal imaging camera and it helped me troubleshoot an overheating Wi-Fi router

Thermal imaging cameras are useful for dealing with issues around your home but they also work great for troubleshooting networking gear.
Optics

NIST: 90% of green laser pointers flout safety regulations

Low-cost apparatus designed by National Institute of Standards and Technology (NIST) researchers to quickly and accurately measure the properties of handheld laser devices has shown that nearly 90 ...