Justin Roeder - Delphijustin industries

World Of CardGames

Justin Roeder — Sat, 18 Oct 2025 19:26:29 +0000

This is a cardgame site that has a variety of multiplayer and computer player cardgames. Including Canasta,Euchre,Rummy,Hearts and others. When you first open this page a game of canasta will load you can choose a different game by clicking on its name in the white bar above the game area.

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Online Solitaire

Justin Roeder — Sat, 18 Oct 2025 17:16:50 +0000

Here you can find a variety of solitaire games. Such as Klondike,Freecell and Spider

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Gin Rummy

Justin Roeder — Fri, 17 Oct 2025 19:55:32 +0000

This gin rummy works in javascript. It is 3D and nothing else is needed to be installed. In Gin rummy you hold all the cards in your hand until you want to go out or knock. TIP FOR SMALL SCREEN USERS: Select desktop site

No iframe support! Please click the Play outside of Iframe button to start

Play outside of Iframe

How to play

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Online Checkers

Justin Roeder — Thu, 16 Oct 2025 18:05:28 +0000

This is a PHP board game of checkers. Download it to your server from github

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Hangman

Justin Roeder — Sat, 11 Oct 2025 22:58:54 +0000

This a hangman game that uses computer,networking and electronics words. It plays in the web browser

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Sitemap

Justin Roeder — Sat, 11 Oct 2025 20:11:15 +0000

Posts

Administrator Tools

Christmas Contest

Christmas Light Contest 2023

Games

Games For Windows

Holiday Lights

Christmas Light Contest 2023

Linux

My Blog

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Mah-jong Solitaire

Justin Roeder — Sat, 11 Oct 2025 19:00:48 +0000

This a game where you try to match all the tiles. You can add it to your site or use it offline by downloading it from Github

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UNO Card Game

Justin Roeder — Sat, 04 Oct 2025 23:19:22 +0000

This is a cool and pretty impressive UNO Game for the computer. I came up with this idea to build this game because I wanted to make a game that would be fun for my girlfriend to play. It has sounds, voices, different card backs, customizable card fonts and table background. There is a 15-minute round limitation in the free trial, buy the password for 10 dollars and source code for 40 dollars. Its a fun game and everytime a new game starts the computer has a random English name.

Download Installer

Download without Installing

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VoltXP Function Generator App

Justin Roeder — Thu, 25 Sep 2025 00:31:38 +0000

This app is a Windows/Linux function generator. It can do sine,sawtooth,square,triangle,noise and sweep. It allows you to use your parallel or serial port as a square wave generator. It also can be configured through the command-line. Has a nag screen when parameters are passed without registering the password. You can click on the black screen for a drop down menu.

Download Now

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Soundcard Function Generator Amplifier

Justin Roeder — Mon, 22 Sep 2025 08:08:27 +0000

Here’s a simple 1 transistor amplifier that will amplify the voltage to a decent range not just line level 1v. I found it in falstad, Falstad had the specs I wanted. A oscilloscope may be good to have to check voltage levels and signal quality. I used ceiling fan capacitors the output capacitor was 5uF but works the same at 10uF probably the more output capacitance less ac resistance you get. I used a 2N3904 as the transistor.

This type of amplifier is called a “Common Emitter Amplifier” Note that this amplifier won’t give you a lot of current like a real function generator

Laptop power supply and amplifier PCB

Transistor and resistors on PCB

Sawtooth wave

Sine wave

Square wave

Schematic

Triangle wave

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