This is a redesign of the Tremshifter by Dead Astronaut FX. It’s a tremolo and filter in one. There are two LFOs, one driving each the tremolo and the filter, with a rate and depth control for each.
I built a couple of the Dead Astronaut boards and they worked well. I didn’t like the layout and wanted to mount the pots to the PCB for easier assembly so I redesigned the board in Eagle.
Here is the schematic:
Here is an image of the PCB.
I rearranged the pots and set them up so they are all mounted to the board. I put the switches in the bottom row. The LEDs are mounted to the board in logical positions. And last, I setup the off board wiring using the standard wiring for easier off board wiring.
This layout should fit a 1590BB in portrait.
Here is a parts list:
Part Value Device Package Library Sheet
FDEPTH B100K 16MM
FILTER on/off SPDT
FRATE A1M 16MM
RANGE on/on SPDT
SQ/TR on/on SPDT
TDEPTH B1K 16MM
TRATE A1M 16MM
VOL B22K 16MM
I found a mistake in the schematic here! See my build post for a fix. There needs to be a connection from IC3_A pin 3 to the junction of R16 and Pin 1 of FDEPTH pot.
To fix this on the PCB the fix is easy just run a wire from pin 3 of IC3 to right pad of R16. Turns out these are right next to each other in the layout.