Peter Javorsky tekk

Backup and restore like a pro

But if you want to do it manually in the shell, with post-quantum encryption, do it this way:

Prerequsities

zstd - ZStandard is a real-time compression algorithm with compression ratios similar to brotli or standard deflate (zip)
rust & cargo - cargo is needed to install rage (use package manager of your choice)

SCD40 CO2 Sensor with ESP8266 D1 mini and ESPHome

Connect a Sensirion SCD40 CO2 sensor to an ESP8266 D1 mini and run it with ESPHome. This allows you to measure CO2, temperature, and humidity in your room and integrate the data into Home Assistant, Prometheus, or MQTT.

Wiring

SCD40	ESP8266
VCC	3V3
GND	G

How to add `Ctrl + Alt + T` keyboard shortcut similar to Linux to open Terminal on MacOS (`⌃ + ⌘ + T` 2025 how-to guide)

On macOS there is no global “open Terminal” shortcut out of the box.

Option (⌥)+⌘+T is already used in Finder to show/hide the toolbar.
Control (⌃)+⌘+T isn’t assigned system-wide (only in some apps for context-specific commands), so it’s free to grab for a global hot-key.

Below is a Linux-style setup using Automator + System Settings so that ⌃+⌘+T will launch Terminal no matter which app you’re in.

News

There are some good sites to follow what happens in technology. They provide community powered links and discussions.

Reddit Programming: https://www.reddit.com/r/programming/
Hacker News: https://news.ycombinator.com/news

Podcasts

	#include <array>
	#include <cstddef>
	#include <algorithm>

	struct LipoPoint {
	float voltage;
	float percent;
	};

	static constexpr std::array<LipoPoint, 21> kLipoCurve = {{

	// Cycloidal Drive(s) for 28BYJ-48 + M3 screws OR 623ZZ bearings
	// Author: Peter "Tekk" Javorsky, OM7TEK
	// Single-file parametric OpenSCAD. Set `part` below to generate each printed part.
	// Units: millimeters.

	/******************** CONFIG ***********************/
	part = "assembly_v1"; // choices: motor_mount, hub_eccentric, cycloid_disk_v1, ring_pins_v1, output_carrier_v1, spacer, cover,
	// cycloid_disk_v2, ring_rollers_v2, output_carrier_v2, assembly_v1, assembly_v2

	// Global tolerances

	def hsv_to_rgb(h, s, v):
	if s == 0.0:
	r, g, b = v, v, v
	else:
	i = int(h * 6.0)
	f = (h * 6.0) - i
	p = v * (1.0 - s)
	q = v * (1.0 - s * f)
	t = v * (1.0 - s * (1.0 - f))
	i = i % 6

	Windows Registry Editor Version 5.00

	[HKEY_CLASSES_ROOT\Directory\Background\shell\open_msys2]
	@="Open MSYS2 here"

	[HKEY_CLASSES_ROOT\Directory\Background\shell\open_msys2\command]
	@="c:\\msys64\\usr\\bin\\mintty.exe /bin/sh -lc 'cd \"$(cygpath \"%V\")\"; exec bash'"

	[HKEY_CLASSES_ROOT\Folder\shell\open_msys2]
	@="Open MSYS2 here"

	#include <Adafruit_NeoPixel.h>

	#define PIN D7
	#define STRIPSIZE 16

	Adafruit_NeoPixel strip = Adafruit_NeoPixel(STRIPSIZE, PIN, NEO_GRB + NEO_KHZ800);

	void setup() {
	strip.begin();
	strip.setBrightness(25); // Lower brightness and save eyeballs!