>
>> I could be totally wrong here but last time I looked at the LM2940 it
>> needed
>> some pretty expensive low esr caps to stop any oscillating. Worth double
>> checking before buying a load.
>>
>> Dom
>
>
> You're right. They have a pretty big section on the datasheet about that.
> To be stable at no load, they want 22uF with an ESR of 0.1 to 1 ohm for
> the output capacitor. I'll look at this a little further...
>
> Harold
>


Well, this is just driving a 10f200 and a fet, so I don't need a whole lot
of power. I'm now leaning towards a series resistor, zener to ground, and
1uF across the zener. That should regulate, provide transient protection,
and reverse polarity protection...

Harold


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