In article ,
Mike W wrote:

Another trick I've seen is to use a hefty power MOSFET (one with a low
Rds[on]), with the source and drain leads reversed, in series with the
power. Depending on the voltages involved, you can either connect the
gate directly to the opposite side of the power supply, or (if the
supply voltage may exceed the Vgs limit) to a high-Z resistive divider.

Nice one Dave

Not my idea originally, by any means. If I recall correctly I first
saw it in Bob Pease's "Troubleshooting Analog Circuits" book - a
text I recommend to anyone who is fiddling around with analog
circuitry in any way.

--
Dave Platt AE6EO
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