Electronics > Beginners

Does one need to know all the different types of meters (past and present)?

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saturation:
Since time is a resource you cannot get back after you use it up, its best to save or use it wisely as much as you can.

For TV, find ways to get rid of the advertising by using a DVR or such or getting the shows as a DVD or bluray, in the USA, ads use 1/3 of every broadcast hour to advertise what you don't want to see.  You can easily get several more hours per night to do something you really want to do.

Most shows today, even rebroadcasted old shows, are shortened, often edited to squeeze less show, and more advertising out of it; a common example is changing the ending and opening credits to save time.  I thus, almost never watch straight TV, but if I like a show, I will find DVR it, or wait for it on disc or watch it through a non-advertising sponsored way.

http://en.wikipedia.org/wiki/Television_advertisement#Frequency





--- Quote from: shafri on July 29, 2010, 03:07:32 pm ---
--- Quote from: DJPhil on July 29, 2010, 02:34:14 pm ---In my opinion, nothing beats James Burke for technological history. One of his big fans put the four major series that he did on youtube. I listen to these while I work all the time.
Here's the bit on Babbage. Connections 3, Episode 2.
Hope that helps. :)

--- End quote ---

i wish i have the time to sit for just a half an hour more frequently infront of discovery channel tv



--- End quote ---

qno:
There is also another type where the coil is stationary and iron attached to the needle is moving.
One big advantage of this meter is that it always indicates RMS value AC & DC.
I think it is called iron core movement
 The galvanometer is an DC average meter and has long been a source of errors, measuring AC voltage and power.

alm:
There's also the differential voltmeter, which I believe was the instrument for accurate voltage measurements before the DVM came along.

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