Yet Another Pedal? Meet PENDA!

Hey everyone,

I know, I know… another pedal project, right? :smile: But stick with me for a second because PENDA (Platform for Effects oN DAisy) brings a few cool twists to the table!

What makes PENDA different?

  • 100% Analog Dry Path: Yep, the dry signal stays fully analog to preserve your tone’s integrity while still offering powerful digital effects.
  • Large 2-inch SPI Display: Bigger screen, more room to tweak and see what’s going on. Perfect for navigating complex settings or just showing off cool graphics. :sunglasses:
  • 4 Encoders with Pushbuttons: More control at your fingertips—literally! Easily dial in precise adjustments without feeling cramped.

The whole design is based on the Daisy Seed board, but with these added features, I think it stands out in its own way.

What do you think?

I’d love to hear your feedback and ideas! Don’t hesitate to challenge my design. I’m open to suggestions, improvements, or even completely new ideas. Let’s make this pedal as versatile and powerful as possible!

Feel free to check out the project on GitHub PENDA Hardware : https://github.com/DADDesign-Projects/PENDA-Hardware

Looking forward to your thoughts!

Cheers,
Philippe

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Have you built any of these?

Yes, I have built a working prototype of the PENDA pedal, and … it works well! Currently, I am working on a delay and a looper, but I don’t have anything presentable yet.
Philippe

Small video : https://github.com/DADDesign-Projects/PENDA-Hardware/blob/main/Images/PENTA.mp4

Image :

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This is looking awesome!! Keep us all posted :slight_smile:

Very cool! Do you have any C++ samples how to initialize and use the OLED display?

Hi! Yes,
I’ve already published a post on this topic.

You can find the code on my GitHub here:
https://github.com/DADDesign-Projects/DEMO_DaisyGFX_ST7789 .

Philippe

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Haha, analog DRY path FTW.

Hello,
I tested the sound quality between the dry and wet (unprocessed) signals, and although the difference is subtle, it is very real! The dry signal has a bit more bass and slightly better definition.
Philippe

Oh, I’m totally with you. Why would you not have an analog dry path, its just silly to do it any other way. And it makes it super-easy to split your outputs if you’re lucky enough to be running separate wet & dry amps.

Probably a stupid question, but isn’t the OLED displayed reversed?

Bonsoir
I’m not sure I understand your question clearly. Are you asking about the electrical connections? If so, I’m using a 2-inch LCD Display Module with an IPS screen, 240×320 resolution (it’s not OLED). The connection order on this module is actually reversed compared to similar screens.

Philippe

The connecting pins are on the left side of the screen. However, in your pedal the connecting pins are on the right side of the display. This makes me think you display image is rotated by 180 degrees, is that true?

Bonsoir
Yes, you could say the screen is rotated by 180°, but that’s really just a way of looking at it—the screen itself doesn’t have a specific “right-side up.” In my graphics library, there’s a function called setRotation(angle) that allows me to set the XY coordinate reference frame of the screen however you like.

Philippe

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If you don’t mind yet another question - what enclosure size/type are you planning to use?

Thanks

Hammond 1590BBS.
Philippe

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