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In the next lesson, we're going to look at

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how you can change your power supply's output
over time automatically.

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A lot of people, I've found, don't know this.

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If you use this in your testing,
you can impress all your neighboring engineers.

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Power supplies don't just have to output one power
for a long amount of time.

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You can go in and change over time
what power output it has.

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I think it's called output lists?

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Can you speak about output lists a little more
for power supplies?

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List mode, for short.

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It's a good way to change voltages.

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You can either have it
have a constant dwell time,

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so it just steps through a series of voltages,
each with the same amount of time

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or it can set the list,
each step to have its own independent time.

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Some examples of doing that are, just recently,

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we wanted to test a device
to make sure it turned off.

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If it was below a certain voltage,

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we wanted the device to turn off
so it wouldn't run down the battery.

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List mode was a great way to do that.

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We could test it at several voltages,
ramping down,

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and then see when the device turned off
and verify the turn-off circuit.