On 06/05/2011 16:53, PICdude wrote:
>    I'm considering on-board
> relays vs. MOSFETs.

But you need MOSFETS or BJTs anyway to drive the relays.

If you choose suitable MOSFETS, snubber and/or diode etc driving the=20
solenoids direct can be more reliable.

But there is a big difference between say 12V 500mA solenoids and 110V=20
10A ones.


You don't say what voltage/current of solenoid.

You can also monitor the MOSFET output via resistor divider (even OR=20
them all with diodes)  and have an alarm or something if a FET fails.

900V 10A MOSFETs are < $2
--=20
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