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turingbirds / usbreset.rst
Created October 31, 2014 20:30
View usbreset.rst
turingbirds /
Last active August 29, 2015 14:16
Execute a child program in a new process
# -*- coding: utf-8 -*-
"""Execute a child program in a new process"""
import os
import subprocess
def exec_binary(cmd_line_list, cwd=None, stdout=None, stderr=None, verbose=False):
"""Invoke an executable file.
turingbirds / inkscape_to_dxf.rst
Last active February 24, 2019 18:07
From InkScape to DXF
View inkscape_to_dxf.rst

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 / upload.php
Last active May 30, 2019 13:40
a simple php upload script
View upload.php
header("Content-Type: text/html; charset=utf-8");
function display_filesize($filesize) {
if (is_numeric($filesize)) {
$decr = 1024;
$step = 0;
$prefix = array('Byte','KB','MB','GB','TB','PB');
View ip_cam_ethernet_usb.rst

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 /
Created April 30, 2020 10:32
Manually launch xscreensaver; disable auto-activate
# 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 / moore_penrose_pseudoinverse.c
Last active February 16, 2022 10:21
Compute the (Moore-Penrose) pseudo-inverse of a libgsl matrix in plain C.
View moore_penrose_pseudoinverse.c
* Compute the (Moore-Penrose) pseudo-inverse of a libgsl matrix in plain C.
* Compile uding:
* gcc moore_penrose_pseudoinverse.c -lgsl -lblas
* Dependencies:
* - libgsl (GNU Scientific Library)
* - libblas (Basic Linear Algebra Subprograms)
turingbirds / Agilent 82357B GPIB interface programming on Ubuntu Linux.rst
Last active March 11, 2022 11:43
Agilent 82357B GPIB interface programming on Ubuntu Linux
View Agilent 82357B GPIB interface programming on Ubuntu Linux.rst

GPIB interfacing using Agilent 82357B on Ubuntu Linux

I initially had some problems installing on my laptop, so decided to boot Ubuntu 12.04.5 LTS, 3.13.0-32-generic from USB and work from there.

For an automated installation script, see (and gpib.conf) below. The rest of this document describes the actions of the installation script step-by-step.

First, get the packages that are necessary to support Python bindings:

turingbirds / bwedge.scad
Last active March 15, 2022 13:24
Beveled wedge shape for OpenSCAD
View bwedge.scad
// Beveled wedge shape for OpenSCAD
// Written by C.A.P. Linssen <>, 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 <>.
// module bwedge