La Guitare à crayon is free hardware (as in “free speech” not “free beer”). This document as well as all documentation on the project (hardware designs, source code, …) is published under GNU GPL; you can redistribute it and/or modify it under the terms of the GNU General Public License.
- DG408DJZ (multiplex)
Schematic & Board (Eagle):
Collector-Stabilized Biasing / Voltage divider biasing