Testing the 2nd stage amplifier

To test the first stage amplifier I need a voltage source with a couple of mV. A signal generator usually has problems generating such small voltages. I could have used a voltage divider in front of the signal generator but I used a piezo headphone which is ideal for this kind of test. You find them in greeting cards, for example.

next step: Connecting the amplifier to power and the oscilloscope USB-DUX

noninvopamp/piezo.txt · Last modified: 2014/05/03 00:30 by berndporr