Electronics diagram

Expanded diagram

Suggested box layout

Clean Blend mod

Separate volume mod

Tweaking the mud

Troubleshooting the duo

Troubleshooting the duo diagram

T-Bolt Style Uprights (42″ x 12.5′)

Schematic

Parts list and costs

Hardware mounting list

Lots of duo boards to print out

25 May 2004: linked to mud tweaking FAQ

27 May 2003: added two 1k resistors to parts list (for LED), updated Ge diode part number