Tom=E1s =D3 h=C9ilidhe wrote:

If so can someone
> suggest suitable through-hole transistors to use? MOSFET's maybe?
> =


2N7000 N-channel
BS250KL P-channel
You'd have an easier time designing the circuit board if you use SOT23
devices:
FDV302P P-channel
FDV303N N-channel


> =

> Does anyone know approximate average values for the milliampere hours of =

> AA and AAA batteries? I've looked at a few datasheets but strangely most =

> of them don't mention it... and for the few that do mention it, there =

> seems to be massive variation (e.g. from 500 mAh to 2.7 Ah).
> =

> I went to the Duracell website (they're a popular brand of battery in my =

> country) and I still couldn't find out what the capacity was of their AA =

> and AAA batteries.
> =


Why does it matter? Treat it like a voltage source that dies at about
1v. You're not mass producing them.

-
Martin
-- =

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