Load Monitor + Switch

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#1
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I would like to monitor a 12 vdc supply rail ( Around 2 A full load) . If the 12 volts begins to drop I would like to switch to a dummy load (to keep the switch supply somewhat loaded so the 12v doesn't just jump right back up), and if/when the supply were to go back to a steady 12 V dc switch back to main load.

Now I thought either a voltage comparator + Latch circuit + MOSFET combination or a Hall Effect linear current sensor (ACS712) comparator + Latch + MOSFET combination would work. But I don't know which one would be the better choice.

Anyone do this before? Suggestions?

There won't be a AVR involved... sorry :(

Oc.

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Possible, sure, but I guess you will find that it's more complex to do all this in hardware than with an AVR, and let the software handle the process.

Nard

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