Amplifier Initial Functional test

A project log for Photo-acoustic Spectroscopy

Creating an at home photo-acoustic spectroscopy system

JasMoHJasMoH 11/09/2017 at 22:240 Comments

After tweaking my solder setup, I got one of my three prototype boards to work. This one is populated with the AD8429 (variable gain amplifier) and a trip pot so I can get an idea for the gain necessary for my application.

My totally low noise haywire setup. PC sound card on lowest volume stimulating a 440Hz sine wave for input.

Results with a low gain applied.