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Topic: Voltage amplifier needed? (Read 125 times) previous topic - next topic

panagiotis_logothetis

Hello everyone,

I want to connect an analog Tensiometer (output voltage 100mV-10V) with the Arduino UNO (input voltage 6-20V). Do I need a voltage amplifier, so that the Αrduino can read the low values (below 6V)?

TheMemberFormerlyKnownAsAWOL

#1
Oct 27, 2020, 09:37 pm Last Edit: Oct 27, 2020, 09:37 pm by TheMemberFormerlyKnownAsAWOL
Quote
with the Arduino UNO (input voltage 6-20V  0-5V).
Fixed that for you
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alesam

You, actually need a divider. Arduino can take voltage  higher than Vcc. 
If you want more accurate reading I'd suggest to use an external ADC like this one . But you will need a divider anyway.
Don't say "Thank you", just click on 'karma [add]' instead.

TheMemberFormerlyKnownAsAWOL

You, actually need a divider. Arduino can take voltage  no greater than half a volt higher than Vcc.

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alesam

#4
Oct 27, 2020, 11:14 pm Last Edit: Oct 27, 2020, 11:16 pm by alesam
"no greater than half a volt"

Actually you can apply any reasonable voltage if your current is limited, clamping diodes will take care about it.
But both statements are not important for now.
Don't say "Thank you", just click on 'karma [add]' instead.

TheMemberFormerlyKnownAsAWOL

you can apply any reasonable voltage if your current is limited

Doesn't seem likely, does it, given the original post?
Please don't PM technical questions - post them on the forum, then everyone benefits/suffers equally

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