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Set up Your Raspberry Pi Headless in 10 Easy 🤔 Steps

Goal

You want to set up your Raspberry Pi without monitor and keyboard. This is sometimes called "headless". Don't worry, you'll keep your head if you follow these step-by-step instructions (however, see license and disclaimer below). We will install the Raspbian operating system and configure the Pi WiFi from a Terminal session on a Mac.

Prerequisites / Assumptions

You have:

A Mac with a SD card reader (either built in or an USB device).
A Raspberry Pi 3 B (A Pi 2 B with a compatible WiFi dongle works as well).

How to fix Processing (https://processing.org) Camera and Microphone on macOS 10.15 Catalina

This solution requires that you are a member of the Apple Developer program

Last updated on 2020_11_08

Update: In Processing alpha2 (15 September 2020) with the libraries Sound 2.2.3 and Video 2.0, Audio and Video input are still broken. The workaround below should work with that version as well, although I have not tested it.

Apple has been changing around things for developers quite a lot since 2019. This concerns (among others):

newly required permissions for apps that access the camera and microphone

pd startup crash

When pure data (https://puredata.info/) crashes at startup, open the sketch with a text editor.

If you see a minus in a line like this

#N canvas 38 -769 692 735 12;

delete the minus

How to get New York city subway live data in TouchDesigner

This is a short write up on how I am getting live data from the New York city subway https://new.mta.info/ (metro, underground, U-Bahn, however you call it) in TouchDesigner https://derivative.ca/. It is a bit terse and requires some tinkering, installing, using git and changing settings. Hit me up on Twitter if you have any questions (https://twitter.com/crcdng).

Many live data feeds come with a REST API where you can call a web service and get data back back in JSON format. The realtime subway data uses a different mechanism called GTFS Realtime, which is based on Protocol Buffers (https://developers.google.com/transit/gtfs-realtime/). I believe you can get the data in JSON format for Google Maps, but here I will retrieve it directly with Python, the included scripting language of choice in TouchDesigner.

Before retrieving the data within Touch, I will get it with a Python script running outside of Touch. The reasons are (1) in this way the ne

Unity3D tips

1. Avoid creating objects inside the game loop.

Unfortunately one of the first things you see in many Unity game tutorials is a mistake.

Wrong:

using System.Collections;

	// flutter static canvas example
	// by @crcdng
	// adapted from https://medium.com/flutter-community/flutter-custom-painter-circular-wave-animation-bdc65c112690 by @divyanshub024

	import 'dart:math' as math;

	import 'package:flutter/material.dart';

	void main() => runApp(MyApp());

	// flutter animated canvas example
	// by @crcdng
	// adapted from https://medium.com/flutter-community/flutter-custom-painter-circular-wave-animation-bdc65c112690 by @divyanshub024

	import 'dart:math' as math;

	import 'package:flutter/material.dart';

	void main() => runApp(MyApp());

	import 'dart:async';
	import 'dart:math';

	void main() {
	print("The main UI thread starts here.");
	print("Now it will take 10 seconds to display news headlines.");
	displayNews();
	print("The main UI thread ends.");
	}

	// http://www.99-bottles-of-beer.net/

	void main() {
	for (int beer = 99; beer >= 0; beer--) {
	String bottles = beer > 1 ? "bottles" : "bottle";
	String bottlesLeft = beer == 1 ? "no more" : (beer - 1).toString();
	String leftBottles = beer == 2 ? "bottle" : "bottles";
	String beerline =
	'$beer $bottles of beer on the wall, $beer $bottles of beer.\nTake one down and pass it around, $bottlesLeft $leftBottles of beer on the wall.';
	String lastline =