Re: [photo-3d] Re: Ni-MH for Viewers

[Brian Reynolds <reynolds@xxxxxxxxx>]

Wes wrote:
> --- In photo-3d@xxxx, "Dr. George A. Themelis" <drt-3d@xxxx> wrote:
> > >I chose a drain of 
> > >300 ma. as it is fairly stout, yet not as great as a portable DAT 
> > >recorder or perhaps a camcorder.  Yet, it's greater than a light 
> > >bulb.  
> > 
> > 300 mA greater discharge current than a light bulb???  
> > Even in the 1950s they used a light bulb (no. 14) rated
> > 300 mA.  Since then we have seen the no. 245 bulb
> > (500 mA) and now a lot of people are using 800 mA 
> > halogen bulbs.
> > 
> Indeed, those bulbs do suck up the current.  But remember, I was 
> discharging only one cell at a time for the 300 ma. drain, whereas 
> those bulbs you mentioned were meant for two cells for the current 
> flow you cited.  At my drain of 300 ma for one cell that would figure 
> out to a 600 ma flow for the usual three-volt pair.  You've got a 
> point anyway, though, as I hadn't considered those hefty halogen 
> bulbs.  Perhaps my selection of a 300 ma drain for a single cell (600 
> ma per 3v. pair) was fairly practical, afterall.
> 

It's been a long time since my EE classes, but I think you are
mistaken.

Voltage adds in series.  Current adds in parallel.  To get 3V from two
1.5V(approx.) cells you connect them in series.  Each cell has the
same current flowing through it (600mA in this example).

-- 
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