I do not think one will find detail technical manual as to how to build advanced devices in any Vedas or ancient Indian text. The reasoning is that even if there was an advanced civilization comparable to today existed then - it has been documented in Ramayan and Mahabharat that great wars took place and based on certain descriptions, nuclear, neutron and other advanced weapons were used. So, after the world war, when mankind went back to the stone age - for a long perioid of time, there was no records written down. The information was passed on via human memory and speech. After many generations, it is impossible to pass on detail technical knowledge of such devices. Try doing that with your kids about the detail design of the computer or LCD screen or microchip. Unless we unearth some advanced devices, circuit boards, nano technology etc from a time capsule - here or on moon, we may not get anywhere....but fun to speculate.