Spehro Pefhany wrote:
>> The load will be up to ~250mA, btw.
>
> Use Bob's method only. Eg.
>
> R1 1K 1/4W
> R2 10K
> R3 6K8
> NPN: 2N/MMBT4401
> PNP: 2N/MMBT4403

You had better make sure the load will use all its available voltage else
the PNP transistor will fry.  Note that the MMTB4403 can only handle 500mV
accross it at 250mA.  This circuit will also be quite slow turning off, but
that may not matter.


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