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Topic: Voltage divider problem (Read 6 times) previous topic - next topic

dhenry

Quote
2 x 10 Megohm resistors across it (R1 and R2), making a 1:1 divider


That type of dividers are basically unusable for an avr's adc.

tack


Quote
2 x 10 Megohm resistors across it (R1 and R2), making a 1:1 divider


That type of dividers are basically unusable for an avr's adc.


It was a hypothetical example to show the effect of a test instrument on the circuit being tested, in as simple terms as possible. The values were simply comparable to typical resistance of a voltmeter and values where any calculations were either simple enough to do in your head, or just intuitive to anyone with a little experience.

dhenry

Even in those cases (of extreme resistance), you can still make it work if you are prepared for some compromises.

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