Update (07.08.2015): This one is now verified as working, thanks to Patrick 🙂
Update (10.07.2014): Minor change to the schematic and vero layout adding a series resistor to the sync input tip.
Next up in the tap-tempo series; the Boss CE-2! Again, somewhat modified to work off of the LFO v2 chip. I’ve tried to keep the component labeling consistent with the Tonepad schematic to make things a bit easier when adding mods etc. And again, I’ve left the “Multiplier” and “Waveform” pots in there, but the “Waveform” pot should probably just go and pin #2 grounded (sine wave) as most of the other waveforms don’t really work that well for this effect.
Vero layout is coming, but it’s going to be a challenge and might take a while.
Update (28.02.2014): A few minor changes to the schematic, and here’s a vero layout to go with it! Luckily I already did a layout for the standard CE-2, which made this one that much easier.
Hi Austin,
You are right about the chip not having a manual adjust, only the tap-tempo switch input. I’m working on a new chip that includes a manual adjust rotary encoder, but it does mean a larger package with more input pins is required.
Am I correct in assuming that the rate of the chorus is output from pin 5 of the attiny? So this version does not have a rate control, or am I just missing it? Is it possible to include a manual rate pot control as well, then have either the pot or the tapped tempo set the rate or would that require more output pins from the chip?
Thank you plenty for verifying, Patrick!
Hi Harald
Built this one last week and it works fine.
Thanks
Patrick