Originally posted by boondock-saint
NOTE: that he has comments disabled on that video...
There's
NO WAY that AAA battery is powering that CRT TV!
I'm an electronics technician, education in electronics engineering, and no, NOT possible.
Any alkaline battery cell is only 1.5v... DC.
Any device that plugs into a wall outlet (recepticle) is 120v... AC.
Simply NOT compatable.
There are DC circuits inside the TV, mainly the circuits involved with the menus... basically every digital circuit in the TV, but the CRT tube
operates at 10,000-20,000 volts AC. The input circuits in the TV are AC. It ends there. The TV would require a specialized power invertor to convert
the 1.5vdc up to 120vac, or would need an invertor
specifically designed to convert the 1.5VDC into the multiple AC voltages needed by the
flyback transformer and etc.
The DC in TV / CRT display ciruitry is botom of the tottem pole. It comes in as AC, and is then transformed into the
AC voltages needed by the
flyback and other AC circuits, and in the process power diodes are used to cut the trasformed voltages into the required DC +5, -5 (sometimes) and 12v
(not required, really, but common)... However, the transformer at the input is what does the voltage conversion in probably most tv designs.
So even if the CRT didn't require AC, the digital circuits still use +5v or better. Meaning you'd need (rather pricey) DC-DC conversion circuits
built in
at the power input of the TV.
And even if you tried to use a similar sized LCD TV for this, which uses DC throughout, assuming it had DC-DC converson circuits for this application
built-in, the total wattage (volts
x amps) would probably suck that battery dry by the time the display even kicked on.
So save your RCA cables folks. At least he didn't tell everyone to cut the end of the power cable! I'm even skeptical that the battery made contact
with the inner wire after snapping off that prong, especially not the flat end of the battery. Since he's using duct tape why even snap it off? That
center prong is what MUST be used to make contact with the AC prongs on the other end.
3 MILLION views?!?! Damn I need to get out of politics...
Good thread tho! I also recommend finding the BBC/PBS series "Rough Science". Clips are short and limited on the streaming sites (I wanted to make a
thread for the show the other day actually), but you can find it on bitorrent perhaps.
[edit on 28-4-2010 by IgnoranceIsntBlisss]