todbot / qtpy-knob Goto Github PK

Noticed a couple of things when using the specified Bourns PEC11-4215F-S24 encoder:

1. The diffuser ring is too thick for the lock nut to fasten. It's 2 mm thick, and there's exactly 2 mm of thread left on the encoder.
2. The D-shaft cutout in the top is too deep to allow the encoder shaft switch to trigger.

Otherwise, it's a fantastic project and very easy to make. Yes, I used a Seeeduino XIAO, too

Workarounds

I made the central part of the diffuser thinner so the lock nut would fasten. Excuse the OpenSCAD, it's all I know:

bbox = [ 49.988811, 49.994404, 2.000000 ];
minima = [ -25.000000, -24.997202, 2.700000 ];

difference() {
    translate([-bbox.x/2, -bbox.y/2, 0])translate(-minima)import("qtpyknob-diffuser.stl");
    translate([0,0,0.8])cylinder(d=bbox.x/2, h=bbox.z);
}

For the D-shaft cutout, a blob of Blu Tack of just the right size mostly fixes the issue.

Thank you for this piece of code and great idea.

Just a suggestion to avoid "-" into python file name and user "_" instead.

This permit to never rename the original file from the project and have a code.py like this:

import qtpy_knob_simple
#import qtpy_knob_scroller
#import qtpy_knob

PS: I have both QT-Py and Seeduino XIAO in the same form factor... my QT-Py is more precious because it has reset button, Stemma-QT pin, RGB. So I wanted to rename the pin for XIAO use... but there is no need, your code works out of the box on the same physical pin with the same code. Only the through hole seems smaller on the XIAO so it does not fit perfectly flush. Did I mention it does also kind of work without soldering!!!

Can this knob be used to control gif playback?

le.
main.py output:
Traceback (most recent call last):
File "main.py", line 30, in
RuntimeError: Pins must be sequential GPIO pins

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