Direct Box – Active Isolated

This is a simple active Direct Inject Box with transformer isolation.  It is similar to the active isolated box featured in the Boscorelli Book The Stompbox Cookbook.   It features a gain control, polarity switch and ground lift switch.  If built in a metal enclosure (recommended)  you should use a XLR jack with a plastic casing so that the ground lift to work properly.

Would you like a Ready to Solder Circuit Board for this project?