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Topic: Testing a Voltage Regulator (Read 1 time) previous topic - next topic

marian42

Will an LDO regulator be necessary for a 7.2V battery? What happens if the 7805 is supplied less than 7V?

KeithRB

It will stop regulating at some point, and the output voltage will go down.

marian42

So it will output less than 5V if the input is for example 6V?

Could I use an analog input of a microcontroller to find out if this point is reached?

KeithRB

Only if you use an independent voltage reference, if the reference is relative to the supply you will never see any change!

marian42

So how can I read the battery level with a microcontroller?

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