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You’ll want them in series to raise the Vf (total forward voltage. , also = clipping threshold).

Agree about reading that article. Also, Do you have a multimeter? If not, get a cheap one and put it in Beep mode (conductivity test) to illustrate how the pcb points correspond to the circuit diagram. That process might clarify things.

It’s not the same, but kinda similar to the Tube Screamer, which uses a W taper to help get some chances on the middle area. You can try messing with this filter some for a mid scoop, worth a try. but there’s nothing structurally set up to cut mids, like a notch filter as is. If you really...

The bigger chunk of metal inside that clear led is the cathode (negative) (toward the center of the board). Just for reference. Glad you got it going!

Cool! You can still do red led one direction, 1n4148 the other direction, that’s just not how you had it when you had a total of 3 1n4148s. You can just put a 1n4148 back where you were gonna put the orange, try both directions so the red still works. The orange led should have worked, IF it...

This picture how you have it? The build doc says diode OR LEDs looks like you have both in that spot

You could just try swapping the led wires to change the orientation of the led and see if it’s lighting. This shows the case where the 1n4148 and led are pointing opposite directions.

Is the led in the opposition orientation from the 1n4148? LED has a higher forward voltage (threshold before it clips). If they’re the same orientation, then the 1n4148 will clip before the signal hits the led threshold. Otherwise, it could be just not enough gain for the led. but I think...

Nice. If you want 2 diodes to change the clipping threshold, you have to put 2 in series (same direction). (Looks like you have 2 diodes same direction in parallel? But for diodes that means it will function just like one diode. Common way is to build a “tent” to put them in series. Here’s a...

Some reference info - handwriting fv-1 code is a whole learning curve. You can also use SpinCad (by digital Larry) to generate code from blocks, but the code he linked from the spinsemi site is probably a better starting point for this specific project. A single eeprom chip can hold up to 8...

A lot of it comes down to: -high frequencies go right through a capacitor, almost as if it was a short. -low frequencies see a capacitor as a high resistance. The larger the capacitor, the lower the frequencies it “lets through”. In a non inverting op amp, the gain is set by: G = 1 + R2/R1...

Love to see the mods and the creativity!

Pt2399 is run off a 5v power supply, so with a hot enough signal it could clip. I know I’ve had a Belton brick reverb clip on me (which is built out of pt2399s). On any of the pt2399 circuits like the seabed or magnetron, you can reduce gain before the pt2399 and recover the volume after...

Lots of nice articles on this site. https://www.coda-effects.com/2018/08/the-different-types-of-diodes.html For more lows, you could increase C4. (Also described in the Wampler article MOD 3). Reading the electro-smash tube screamer article several times can go a long way.

Old article, but still a fun read. Mod 4 (transparent tone control) looks cool. https://www.premierguitar.com/gear/5-diy-mods-to-perfect-your-ibanez-ts9-and-boss-sd-1

When mixing 2 signals, you should use mixing resistors. The fuzz output (from Vol-2) doesn’t have one. It might work ok since you have the resistance from Vol-3 to Vol-2. One concern would be if you have the fuzz volume relatively low, you’ll dump more clean signal to ground through Vol-2 to...

Not exactly the same, but similar concept, some delay pedals tap the output and run the feedback back into one of the inputs. (Example: Deflector) Can confirm the above, you can operate the inputs and outputs totally independent within the same program code, limited to 128 instructions total.

2nd ^. Awesome looking & sounding pedal. Is that the white hammer enclosure? Not sure if you did yet, I'd solder the transistors into the sockets so they don't fall out long term.

So your microcontroller is sending an analog voltage (0-3.3v) to the FV-1 (one of the pot inputs) to set the tempo? Are you trying to use the source code I posted as is? That code reads pot2 > 0.8 as a footswitch press. So, you could read the switch in your microcontroller, then send 3.3V...