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Arduino PID

This is a basic implementation of a PID controller on an Arduino.

To replicate this, wire up the system as shown below:

SSH agent forwarding and screen

When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.

This is enabled by adding the

ForwardAgent yes

option to any of your Host entries in ~/.ssh/config (or alternatively with the -A option). Don't set this option in a wildcard Host * section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.

This notes is written by Sheldon. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

Need

Convert .mov/.MP4 to .gif

Reason

As a developer, I feel better to upload a short video when I create the pull request to show other viewers what I did in this PR. I tried .mov format directly got after finishing recording screen using Quicktime, however, gif offers preview in most web pages, and has smaller file size.

This is not limited to developer, anyone has this need can use this method to convert the files.

	sudo apt-get purge anydesk
	sudo apt-get autoclean
	sudo apt-get autoremove
	sudo apt update
	sudo apt list --upgradable
	sudo apt upgrade -y
	https://download.anydesk.com/linux/anydesk_4.0.0-1_amd64.deb
	sudo dpkg -i anydesk_4.0.0-1_amd64.deb
	sudo apt install -f
	sudo apt update

	<div class="bg-white mb3 pa2 gray overflow-hidden" datetime="{{ .Date.Format "2006-01-02T15:04:05Z07:00" \| safeHTML }}">
	<h1 class="f3 near-black">
	<a href="{{ .RelPermalink }}" class="link black dim">
	{{ .Title }} <small class="f6 ml2">vom {{ .Date.Day }}. {{ index $.Site.Data.monate (printf "%d" .Date.Month) }} {{ .Date.Year }}</small>
	</a>
	</h1>
	<div class="nested-links f5 lh-copy nested-copy-line-height">
	{{ .Summary }}
	</div>
	</div>

	# On the parent, e.g. ColorRect
	# This gives this CanvasItem a "clipping mask" that only allows children to display within it's rect.
	func _draw():
	VisualServer.canvas_item_set_clip(get_canvas_item(), true)

	# On the child (Label)
	export (float) var scroll_speed = 60

	func _process(delta):
	rect_position.x -= scroll_speed * delta

	<?php

	// Autoload Url and Link classes.
	use Drupal\Core\Url;
	use Drupal\Core\Link;

	/**
	* External link
	*/
	$url = Url::fromUri('https://colorfield.be');

	import SwiftUI

	struct KeyframeValues {
	var scale = 1.0
	var horizontalStretch = 1.0
	var verticalStretch = 1.0
	var translation = 0.0
	var rotation = Angle.zero
	}

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Arduino PID

Table of Contents

set -e, -u, -x, -o pipefail

SSH agent forwarding and screen

Need

Reason

	# Basic key operators to query the JSON objects :

	# #> : Get the JSON object at that path (if you need to do something fancy)
	# -> : Get the JSON object at that path (if you don't)
	# ->> : Get the JSON object at that path as text
	# {obj, n} : Get the nth item in that object

	# https://www.postgresql.org/docs/9.4/functions-json.html#FUNCTIONS-JSONB-OP-TABLE
	# Date
	# date before today