> > Uhoh..just realized something (that should have been obvious to me
> > before). My battery is only 1.2v, so is there a flipflop that I can use
> > that will run that low?
>
>         Ouch, 1.2V? You will probably be able to find a flop that runs
that low,
> the big problem will be finding a FET that runs with so little a gate
> voltage. It'll take some looking, none of the "standard" variety of parts
> out there will be able to function with that low a voltage. TTYL

An N Channel FET is OK in portable equipment you are happy to have it in the
'ground"/negative lead. if so the ZETEX ZXMN2A02X8 is superb, albeit a wee
bit fiddly for hand soldering without a PCB (I've done it)



http://www.zetex.com/frame.asp?page=http://www.zetex.com/3.0/new-t1.asp?link
=spotlight
or
http://www.zetex.com/frame.asp?page=http://www.zetex.com/3.0/new-t1.asp


Vthreshhold (turn on voltage) = 0.7v
Vdss 20V
Vgs max +/- 12V
Ids max 6A+ (pulsed 27A!)
1.1w dissipation at 25C
MSOP8 package


Other FETs on the chart above may also suit BUT Vth is not specified on the
chart so you will need t look at each datasheet in turn.


            Russell McMahon

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