shaddai
Active member
Been reading the Ultimate analog desk thread & about page 9 & 10 the discussion of digital pots come up. I've been tempted to monkey with a little linux->usb->i2c->digipot setup to light up an LED or something simple. Not for any specific purpose, but just to learn the path to making it work.
Anyway, one of those brain farts happened and it led me to wondering if there was any reason a photoresistor/LDR as R1 or R2 in a negative feedback opamp situation would be bad news? I read on here somewhere it's because of thd & noise, but couldn't that somewhat conquered with math & part selection? Enlighten me please
todd
Anyway, one of those brain farts happened and it led me to wondering if there was any reason a photoresistor/LDR as R1 or R2 in a negative feedback opamp situation would be bad news? I read on here somewhere it's because of thd & noise, but couldn't that somewhat conquered with math & part selection? Enlighten me please
todd