turingbirds

// Beveled wedge shape for OpenSCAD

// Written by C.A.P. Linssen <charl@itfromb.it>, Sept 2018

// This software is distributed under the "CC0 1.0 Universal (CC0 1.0)" license.

// You should have received a copy of the CC0 Public Domain Dedication along with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.


// module bwedge

turingbirds

From InkScape to DXF

1. Save in Inkscape as PDF

Draft your design in InkScape. If there's any text, convert it to a path before or during exporting (Path → Object to Path).

Save as PDF (tested PDF v1.5).

turingbirds

Connect an IP camera via wired ethernet to an ethernet USB adapter to a Raspberry Pi

Connect the camera to the ethernet USB adapter via a CROSSOVER cable (or via an ethernet switch).

Install DHCP server:

sudo apt install isc-dhcp-server

turingbirds

#!/bin/bash

# I do not want my screensaver to auto-activate after a timeout.
# For some reason, you *have* to select a nonzero, finite timeout value for xscreensaver (there's no "infinity").
# I only want my screensaver to active when I lock my system by pressing [Meta]+[L].
# This hotkey is set up to launch this script, which 
# - starts the xscreensaver daemon,
# - activates the screensaver (with lockscreen enabled),
# - waits for it to terminate (unlocking logs an "UNBLANK" event),
# - then kills the xscreensaver daemon.

turingbirds

Linux installation notes

A giant ball of yarn containing notes on how to set up Debian/KDE Linux, with tips on useful software and commands.

Increase console font size

setfont /usr/share/consolefonts/Lat7-Terminus28x14.psf

turingbirds

import numpy as np

def extract_block_diagonal_blocks(A):
    assert A.shape[0] == A.shape[1], "matrix A should be square"

    N = A.shape[0]

    A_mirrored = A + A.T   # make the matrix symmetric so we only have to check one triangle

    blocks = []