Russell McMahon wrote:

> With say 0.5 mA drive you need a transistor current gain (Beta) of
> 80/.5 = 160 which is  achievable with many of the more capable small
> transistors. I'd use BC337 here but there are many others.

Wouldn't you need an extra diode with a bipolar transistor that you don't
need with a MOSFET (built-in)? That's the reason I suggested a MOSFET.

Gerhard

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