E Gadgets 4: Bread Board of Impedance Transformer and DIY Preamp with LM386
Last Updated on November 18, 2020
First Published on May 13, 2020
Upper Side: Download PDF File: Impedance Transformer
The impedance transformer is tested at "Ukulele 1, DIY Piezo Pickup" in advance.
Lower Side: Download PDF File: Preamp
I change RV2 of Preamp 100 ohms to 1K ohms.
The Jack on the green board is the output of Preamp.
I'm considering of docking these to solder and casing.