5 Handy Ways To Use An Inspection Camera Around The Home And Garage

It's difficult to diagnose or fix a problem if you can't see it, and these cameras help you see what's going on in ...
IEEE Spectrum on MSN

See the sky like never before with a DIY eyepiece

So I decided to build a low-cost DIY amplifying eyepiece, to make it easier for visitors to observe deep-sky objects but ...