voltage amlifier for arduino input read pin

155

01:22:03

For purpouse of reading weak voltage sources and scaling voltage for higher or lowering output readed by arduino input pins.
Especialy with temperature analog sensors or microphone input.

published 7 years ago

sshsslfun

7 years ago

Why not a potentiometer?

eekee

7 years ago

@sshsslfun: in what context? to control the gain of the op-amp?

sshsslfun

7 years ago

@eekee Yea, so you can tune the voltage so you get the best results possible at several levels.

maxim251

7 years ago

Not really. Sometimes is needed fixt value, in my case I need onlu duble that value for arduino readings, that controler have easier co calculate true value. Some of modules have weird range. Like 300mV to 800mV. Arduino will read it ass 300 to 800 steps, but full range of arduino is 1024. My reading using fixt range, like two times, or 3 times, will use full range of controler, and this same should be more precise. Adiusting it manually, I could scrue it up, tempetarure or humidity of air can change my readings. And potentiometer is not secured changes of humidity.

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