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Sometimes the Python Polars library upgrades.

The following are some codebase migrations I've used.

Pre-v0.20.x

1. Find+Replace: pl.Utf8 -> pl.String

v0.20.31 to v1.x

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PCB Ordering Checklist

Check list is tailored for KiCAD.

Main Checklist

1. Pages are "US Letter" if printing in Canada/US
2. Print PCB on paper to check footprints
3. Check STM32 pin assignments with STM32CubeIDE, if applicable.
4. Revision and date?
5. Organization logo?

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RP2040-Zero with MicroPython Setup Guide

Initial Setup (Do Once)

1. Install VS Code.
2. In VS Code, install the "MicroPico" extension.
3. Download the MicroPython firmware from: https://micropython.org/download/RPI_PICO/RPI_PICO-latest.uf2
4. Connect the RP2040-Zero to the computer. If a USB Drive doesn't appear, press: reset-down, boot-down, reset-up, boot-up.
5. Open the USB Drive that appeared. Copy on the MicroPython uf2 file. Wait 30 seconds.
6. Optional: Run pip install micropython-rp2-rpi_pico-stubs to install Python type checking helpers.

• This install the type hints required for the import machine package.

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Repair Agilent DSO-X 3012A Oscilloscope (Busted Power Supply)

Main guide: https://etoast.net/posts/agilent_repair/

Repairing the power supply is not very feasible.

BOM (Parts to Buy)

• Power Supply: RPSG-160-12 [1x]
• RPSG-160-12 Datasheet

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import numpy as np
import pandas as pd
import polars as pl
import time
from memory_profiler import memory_usage

# Array shapes to test
shapes = [
    (10_000, 10),
    (10_000, 200),

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"""
Related to https://github.com/pydata/xarray/issues/10135

Result (in VS Code debugger):

          Shape |     NumPy → Polars |    NumPy → Pandas → Polars
-----------------------------------------------------------------
    10,000 x 10 |           0.003997 s |                   0.033097 s
   10,000 x 200 |           0.002424 s |                   0.050915 s
   100,000 x 10 |           0.000278 s |                   0.021541 s

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Lily58 Build Notes

Firmware

Firmware Setup Procedure

1. Clone and make a new branch.
2. Make a new keymap: qmk new-keymap -kb lily58/rev1
3. Navigate to keyboards/lily58/keymaps/DeflateAwning/config.h
4. Open the rules.mk file at that location.
5. Paste in the magic line (into rules.mk): CONVERT_TO = rp2040_ce

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Debugging Browser Locale Issues

Helpful JS Validations

// Diagnose
Intl.DateTimeFormat().resolvedOptions() // Lists the locale used to format dates.
new Date().toLocaleString() // Main date format things are returned as.

// These are normally correct. They show what languages are requested.

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#include <Arduino.h>
#include <U8x8lib.h>
#include "DHT.h"
 
#define DHTPIN 0 // what pin we're connected to
 
// Uncomment whatever type you're using!
// #define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302)
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

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Guide for Auditing a Python Repo

1. pytest, ruff, pyright
2. skylos for dead code checking
3. uv-secure for dependency auditing