Don't throw old computer, smartphones –You can extract gold from them
This is how you can extract gold from old computer, TV and smartphones.
Sep 03, 2016, 18:05 PM IST
Old TV frequencies can be turned into free 'super WiFi'
Old television frequencies are becoming available for other uses around the world due to a switch from analogue to digital transmission.
Nov 26, 2014, 19:31 PM IST