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Adapters are either center positive or center negative. Guitar pedals are standardized to accept center negative. The diode protects the pedal if you accidentally plug in a center positive polarity. But any power supply marketed for guitar pedals will be center negative, I don’t think I’ve ever...

You could just jumper it if you trust yourself to only ever use the correct power supply. Also I think you wouldn’t notice any difference with the 4001. The headroom in this pedal is already limited to 3.3V by the fv-1, so the analog part of the circuit will be way above that even with the...

I built it as described and I still think it’s a nice idea. If I were to do it again I would probably implement the blend knob as described by Chuck - 5k pot for R5 to get between wet and dry. Phaser is already a blended effect - you take the phase modified signal and blend with dry to get the...

Here is my version of the infinite footswitch code. It may be a bit convoluted, since I took the spin semi patch and edited from there. The footswitch should be momentary, wired something like the attached picture. Or, the same tap switch circuit I posted for the tap tempo thread also works.

that’s definitely an option, tap tempo especially takes up a lot of instructions. You’d either have to use a 3.3V micro, or a resistor voltage divider if the micro is 5V. I posted working tap tempo code here (all within the fv1), I’m not sure if many people have seen it...

So have you tried swapping the red & blue OT wires yet? I don't see a comment that you ruled this out, sorry if I missed it. I finished off a build of this someone had started, and this ended up being the issue. I contacted mojotone since there seemed to be some discrepency on which wire goes...

I have a working patch for the footswitch type, I could share if anyone’s interested. The reverb comes from an infinite hold patch + pitch shift patch on the spin semi site. I have pot0 set to control the fade out time she. You release the footswitch. Different project from what DL is sharing...

am I understanding the Clip functions as being so that you can remove what’s being held and latch on the new input? Either controlled by turning the knob, or tilting a footswitch to this pot input?

awesome write-up! My understanding is JHS didn’t design that blend, I think it originated from an RG Keen article (with the 15K Rs and 10k pot). It’s possible he pulled it from somewhere, but he talks about the theory of choosing 15k and 10k, not just blindly copying. PPCB uses it in the fv-1...

I typically write my fv-1 code by hand, having learned mainly from the info and examples on the spinsemi site. But I have used spincad as a helpful reference tool for things like filters. I export a simple spincad to asm and study it, and compare to block diagrams on spinsemi. So I’m not using...

I’m a big fan of the seabed for short and medium delays. Get a few pt chips as some are noisier than others. But at short delay times, they have less noise so it should work great.

I had the smd soldered by the pcb fabricator (JLC). Mainly, I thought it’d be easier to fit the pcb layout, though I’m guessing through hole could all fit with a well done layout.

I finished up a pedal that I’m pretty excited about. It's a FV-1 implementation of the Mad Professor Deep Blue Delay, where the FV-1 handles the delay time and modulation, but the filtering is analog circuitry around the FV-1. The DBD clone was the first build I attempted, first try (on vero)...

Here’s what I describe in my first post. I since changed to the Voice control, but I don’t know which is better, bass control is probably more intuitive. You can experiment with the cap value to get a deeper or less deep bass.

Hey it’s just bad timing that the other thread is so fresh in everyone’s minds haha. I can’t necessarily help with the calculations, but I’ve read many places that it’s that its a “Bootstrap” concept. Attached is a snippet from the Wikipedia on “Bootstrapping (electronics)”. I’ve seen the...

I’ve thought about double tap also. I think you will end up with a lag on single press. How does the chip know if you will press it a second time? It has to wait a specified length to be sure there won’t be a second press. So on single press, it won’t do the on/off function until after it...

How does the dual relay board work? Hold the switch to toggle the boost or something?

The Unicab has gotten a few good mentions on the forum for bass

At one point several years ago I had read enough hype about the Cornish buffer that I built one, thought it was pleasant and that’s been my go to standalone buffer. Maybe we need a pcb with 3-4 buffer types selectable on a rotary switch. Maybe simple BJT (like TS), simple op amp (like...

I’m curious, is there a general consensus on whether the BBD chips themselves impart any tone characteristics, or if the tone of analog delays (etc) is entirely derived from the filtering in the rest of the circuit? I like the idea of having more options for time based effects, and I think the...