I got the OpenADC and I really enjoy the LNA. I Used the KNJN Flashy knjn.com/Flashy.html before and this is a bit limited. But the Flashy has one big Advantage: The 1MOhm impedance. So it shows the true signals and even weak signals.
I have to digitize sporadic impulses ranging from 0 to +12 Volts, but the Source cant give much current. So with the OpenADC the signals “falls” over time. I mean when a weak source puts a constant voltage, I get the a line parallel to the x-axis on the oscilloscope, but with the OpenADC I get a falling line.
I am using the LNA input and am interested on how to modify the OpenADC. Also on how to modify the OpenADC to accept +12 V as max voltage on the LNA input.
Thank you very much!