This board will help to build your DIY guitar pedal in the 1590BB enclosure. Led, jacks and footswitchs are mounted on the PCB, being only necessary to wire the battery and the effect PCBs. It allows to build single and double effects with several switching configurations.   Individual effect circuits Right and left footswitches control effect circuits independently.  Nested effect circuits Right footswitch controls overall bypass. Left effect is only enabled if right footswitch is enabled. This is ideal for a boost effect after an overdrive/distortion effect. Single effect circuit (right side footswitch) For a single effect unit built in a 1590BB enclosure. Single effect circuit (left side footswitch) For a single effect unit built in a 1590BB enclosure. Single effect circuit with SPDT switch For a single effect with a SPDT switch (diodes, tone, boost...). Right footswitch bypasses the effect, left footswitch controls the effect switch.