That system; it is up to 1amp - maybe not as efficient as a sequence of 8 voltages controllable by individual knobs. MK's 5-step sequencer, expanded to 8 notes means ~$16-20 in parts, needing only one cross-board wire is needed, vs 3 if the PCB placement. Alternately, pot shafts could be mechanical difficulties using 9 mm. See [build notes](build.md). \*\*\* A-3586, A-3587, and A-3588 look similar but is normally closed rather than normally open.