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Cameron King


Here is a selection of several personal projects which I think are most interesting.

Pinewood Derby Racing Web

GitHub: ckxng/racingweb

This is a web-based tool for generating race schedules and running pinewood derbies. It’s written in C++17 with Web Toolkit.

Racing Web Video

Planning Center Tools

These tools help with volunteer and calendar management using Planning Center Online.

Calendar Notify

GitHub: ckxng/pco-calnotify

On a recurring scheudle, this module will watch a Planning Center calendar for events matching a specific set of labels and will send notifications via. email and text message at defined intervals prior to the event’s scheduled time.

Team Schedule Veiwer

GitHub: ckxng/TeamScheduleViewer

Presents a mobile-browser-friendly and printable schedule for voluneers using Planning Center Serviecs.

University of Scouting

GitHub (v1 - node): ckxng/universityofscouting
GitHub (v2 - .net): ckxng/ClassPortal

It’s important to have trained leaders in an organization like the BSA, and 2020 brought some unique challenges. We took a virtual-first approach with University of Scouting, and this meant we needed a tool that provided schedule management, transcript viewing, and degree printing.

Ben Spellmann and I built a transcript reporting system for scouters (adult scout leaders) in Longhorn Council. Using this system, scouters can look up their current schedule and prior registrations through University of Scouting.

Chat Bots and Tools

SoothBot and Invisible Sun Text Parser

GitHub: ckxng/soothbot
GitHub: ckxng/invisible-sun-text-processor

This bot is a Discord chat bot, designed to facilitate online sessions of Invisible Sun RPG. It includes a dice roller, sooth deck and path of suns management, and a lookup for various spells and other game features.

Since the Monte Cook Games license rules do not allow redistribution of game content, I wrote a text parser which is able to transform the Invisible Sun text reference files (a Kickstarter reward from the origninal run) into a structured YAML file which can be read by the bot.

Adaptive Card CLI

GitHub: ckxng/acardbot-cli
NPM: @ckxng/acardbot-cli

I had a need to post text messages to Microsoft Teams channels, and it was somewhat challenging to find a simple API that would do what I needed, especially one that supported environment variables for the webhook URL (to make integrating with Jenkins and similar CI engines easier).

This CLI sends text messages and an optional title to teams channels.

Cypher System RPG Character Generator

GitHub: ckxng/cyphergen-web

This simple Heroku-friendly webapp allows GMs to upload the world parameters for their upcoming campaign, and players may then use a special link to generate Level 1 characters. This is helpful, because Cypher is a system that is designed to be customized, and there is a lack of online tooling supporting this aspect of the RPG system.

Game parameters are entered as a JSON file (example).

Standard Version CI Action

GitHub: ckxng/docker-standardversion
Docker Hub: ckxng/standardversion

I needed a convenient way to manage version numbers at merge-time in JavaScript and Puppet modules, and found that standard-version does the trick nicely. While integrating JavaScript modules with standard-version directly is convenient, it is less convenient for other other project types which don’t already have node_modules present.

To solve this problem, I built standard-version into a docker container and published it, for my own use in GitHub Actions and Jenkins workflows.

2-Lane Pinewood Derby Judge

I made up two designs for this, one bare bones and one with a little bit more flash. Both are purposefully simple, and designed using the MakeCode block editor for the benefit of scouts interested in programming.

Feather M0 Express

GitHub: pxt-simple-pwd-finish-line-judge

The first iteration is based on an Feather M0 Express, and includes only the absolute minimum features required to serve as a finish line judge. The only output is through the single onboard pixel. Blink once for a win in the first lane, blink twice for a win in the second lane.

Circuit Playground Express

GitHub: ckxng/pxt-lightup-pwd-finishline-judge

The second iteration is only slightly more complicated, and is based on the design from the first project. This version uses a Circuit Playground Express, mainly because it is a popular beginner board and because of the number of onboard features.

Here, the 10 onboard pixels are used to a greater effect indicating a win by pointing left or right, and some musical tones are added for fun. Thanks to the addition of a servo motor, an onboard button now releases cars to start the race. This allows the program to track the time of the winning car, though it is only reported by serial.


My “Hello World” lately, has been to generate diceware passwords. Here are a few projects where I explored new languages or patterns.

CLI (Go)

GitHub: ckxng/diceware

I wrote this simply to play around a bit with some specific go patterns, such as test coverage, concurrency, interfaces, and error handling. While this tool seems to work fine for me, use it for your own passwords at your own risk.

package main

import (

func main() {
  var num = flag.Int("d", 8, "number of dice")
  dice := diceware.New()
  if result, err := dice.Generate(*num); err == nil {
    fmt.Printf("%s\n", result)
  } else {
    fmt.Printf("error: %s\n", err)

Web (JavaScript)

GitHub: ckxng/diceware-web
Docker Hub: ckxng/diceware-web
Live: ckxng.github.io/diceware-web/public/

Diceware Web is a static, JavaScript site with no external resources that generates 8-word Diceware passwords.

API (JavaScript)

GitHub: ckxng/dicewareapi

If you would like to generate a diceware password in the least secure way possible, feel free to click the links below.

(The initial API call may take up to a few minutes as Azure boots up the container that hosts the API code. Subsequent calls will be much faster.)

Please don’t actually use these passwords for anything important. I’m sure Azure is run by perfectly nice folks, and their SSL is plenty secure… but this is not a safe way to generate passwords.

It’s more of an Azure API “hello world” than anything else.

API (Python Flask)

GitHub: ckxng/diceware-flask

A second API-based implimentation, equally ill-suited to generate your personal passwords, demonstrates a single Flask-based web API endpoint.

API with Observability (ASP.NET Core)

GitHub: ckxng/diceware-netapi

I wrote this in order to run through the Hello World paces with the new ASP.NET Core libraries, and to demo metrics observality within a simple API.

Very Small Web Publishing Tools

GitHub: ckxng/tinysite
GitHub: ckxng/microsite-php
GitHub: ckxng/microsite-golang
GitHub: ckxng/microsite-ruby
Gist: microsite-cgi

These small webapps wrap static pages in a simple HTML template. The TinySite project includes it’s on WYSIWYG editor, while the others expect the user to update the filesystem directly (for example, via. FTP). I also wrote a version of this in C, but it has been lost to the depths of time.

All of these except the golang version run within the context of a web server. The golang version runs an embedded web server using http.Handle.

Other Misc Projects

GitHub: ckxng

I’ve tinkered with a lot of different ideas, some good, some bad. For every repo that’s pushed here, there are several more that I never got around to uploading (usually because I forgot, then later lost the code).

You will find a mix of finished and unfinished projects (plus a few forks) in the cobwebs of my GitHub profile. I tend not to delete code, no matter how ugly or unfinished. Half-baked ideas have a way of being useful years later. (The file edit dates on these are especially unreliable, as many of them were pushed to GitHub many years after they were written.)