Robert Elder Software's Blog

Interesting Regular Expression Test Cases

The Regular Expression Visualizer, Simulator & Cross-Compiler Tool

Character Class Search Explainer Tool

Character Class Visualizer Tool

Character Ranges & Class Negation in Regular Expressions

Character Classes in Regular Expressions - A Gentle Introduction

A Surprisingly Common Mistake Involving Wildcards & The Find Command

Essential Habits For Being Highly Productive In Linux

An Introduction To Data Science On The Linux Command Line

A Cheaper PCB For The Robot Tank

Improved Tilt Pan Camera Control For The Robot Tank

A Guide to Recording 660FPS Video On A $6 Raspberry Pi Camera

Pump Room Leak & Temperature Monitoring With Raspberry Pi

DS18B20 Raspberry Pi Setup - What's The Deal With That Pullup Resistor?

An Overview of How to Do Everything with Raspberry Pi Cameras

All About SD Card Flash Memory Corruption in Cameras & Raspberry Pis

A Beginners Guide to Securing A Raspberry Pi

How To Set Up and Distribute SSH Key Pairs

Using SSH to Connect to Your Raspberry Pi Over The Internet

Using SSH and Raspberry Pi for Self-Hosted Backups

A Visual Guide to Hiring Software Talent From University of Waterloo & Conestoga College

Why Is It so Hard to Detect Keyup Event on Linux?

Using Fourier Transforms To Multiply Numbers - Interactive Examples

Routing Packets Directly Between ESP8266 Modules

A PCB For The Robot Tank

Automated Plant Watering With Arduino

Jeri Ellsworth & the Robot Uprising of 2038

Can You Create A Wireless Bridge With ESP8266 Modules?

Can You Build a Streaming Video Robot Tank for ~$100?

Monitoring of Plant Growth on a Budget With Arduino

Lessons Learned: Don't Buy Instrumentation Amps With Onboard Potentiometers

Using The GY-511 LSM303DLHC Accelerometer To Detect Waving Motion

Review Of ARTIK 053: Looks Polished, But Docs Fall Short

The Jim Roskind C and C++ Grammars

Endpoint Discontinuities and Spectral Leakage

The Fast Meme Transform: Convert Audio Into Linux Commands

Fourier Transform Coefficients Of Real Valued Audio Signals

Overlap Add, Overlap Save Visual Explanation

Network Enabled LED Blinking With ESP8266

Linux Hardware Debugging For Beginners

FIFO, LIFO Considered Harmful

Myers Diff Algorithm - Code & Interactive Visualization

What is SSH?

An Artisan Guide to Building Broken C Parsers

Modelling C Structs And Typedefs At Parse Time

Silently Corrupting an Eclipse Workspace: The Ultimate Prank

Amazon Cloud Servers For Beginners: Console VS Command-Line

An Overview Of Computer Science Concepts For Engineers

What is Git and Why Is It Useful?

Don Libes' Expect: A Surprisingly Underappreciated Unix Automation Tool