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Electronics HELP!

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Bender:
Again thanks for all the info
It's starting to make sense to me now
I'm actually using the display from the DVD player and the whole PCB and I was just going to get the power from where the battery connects to the board(that way I get power when it's plugged in too) I took out the dvd drive ect. so I was hoping to get about 2 hours out of the thing with the video and marquee on
as for recharging I'm just planing on using the power-cable that came with the DVD player

MonMotha:
Should be OK.  Most battery packs like that have some sort of internal safety (though it is often non-resettable).  Make sure you at least turn off or, even better, disconnect the light from the battery when charging.  If you don't, the charger won't charge the battery right.  It shouldn't create a hazard, but it will take a very long time to charge the battery and could damage its capacity.

There's probably 5V available on the DVD player PCB somewhere if you can find it.  Of course, how much current you can pull from it is anybody's guess.

Bender:
ok, so the the 7805 looks good, now how do I set up the circuit?
I see there are three pins on there what hooks to what?
and How do I get it to drop from 1A to 500mA?

Ed_McCarron:
Don't worry about the 1A/500ma part; current isn't like voltage -- having too much won't blow things up. :) 

As for the 7805...

Three pins - left to right with heat sink down.


Vin   Gnd   Vout



Don't forget the bypass caps -- odds are it'll work without them, but its good practice to use them to prevent stray oscillation.

Bender:
GREAT!

I can do that!
sorry for the silly questions, but what kind of caps should I use for a bypass cap and what does it do?

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