Re: TI-H: backlight question.. (everyone, read it)
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Re: TI-H: backlight question.. (everyone, read it)
> >I'm in the middle of installing my EL into my calc.. suddenly i
> realized that
> >i don't really want to mess up the happy black case to install a
> switch. Then
> >I remembered a suggestion to use a multimeter and find a spot that
> has 6v+
> >only when the calc is on.
>
> I've been meaning to do this for a while, but haven't gotten around to
> it yet.
>
> > I would do that except for one pissy little
> >problem: i can't figure out a good way to NON-PERMANENTLY attach the
> battery
> >to bother the spring and that little square patch of metal...
>
>
> You mean just to power the calculator while you poke around to try to
> find
> a good location?? If so, that is pretty easy, get some 'gator clips,
> you can
> get a package of about 10 at Radio Shack for a few dollars. Install
> the
> batteries into the battery case (while removed from the calc). Place
> a couple
> of pieces of wire or metal (delaminated transformer cores work great!)
> into
> the battery case where the wires from the main board would have gone
> if
> the case were put together. Then just run you 'gator clips from the
> main board
> over to the battery case.
>
> Alternately, you can use a wall power supply with the wires stripped,
> or
> any 6v supply.
>
> When you find a place for the signal, I would recommend running the
> base
> of a transistor from it, rather than attempting to run the inverter
> directly, as
> the inverter may draw more current than the circuit you use is
> designed for.
>
> DK
>
>
whoops! i didn't make myself clear... i meant the backup battery...
about the spot to pull 6v+: you could use a relay so if the spot is on then it
gets power from the batterys
(i've been having finals so i'm really out of it right now) :-P
-dave
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