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 …
Author Archives: Justin Roeder
VoltXP Function Generator App
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 …
Soundcard Function Generator Amplifier
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 …
Simplest Variable Fuse
This is a TL431 comparator fuse that can be made on a breadboard,pcb or even copper tape. It uses a 1.5V Battery(Can be AA,AAA,C or D). Its used to add 1.5V to the voltage drop across the current sense resistor. This is needed since it can only turn on at 2.5V at the reference pin. …
Laptop/Chormebook mobile charger
Have you wanted to take your computer with you but forgot to charge it and don’t have a portable charger. This do it yourself blog post will help. What you need My chromebook uses 19VDC @ 2.31A so I looked at eBay for a boost converter, this is because car voltage is only 12VDC it …
4-in-1 Analog Calculator
Here are ways to do addition, subtraction, multiply and divide using a multimeter. Addition Addition is very simple! To do it just connect some pots in series. With series resistors their resistance adds up. Subtraction NOTE: If there are 3 or more pots in series, just set them all the way down to 0 ohms. …
Clockwire Parallel Port Binary and Digital controlled clock
This program allows you to wire up a 2-digit Binary clock, Digital clock or both. It uses inpout32.dll file to output the time on the data register. I used a rj45 to db25 male module to make connection to my parallel port and the clock. There are 8 wires (9 if you want the hour …
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Elevens Solitaire
This game is a work of art! The rules are simple, in fact it may even be easier to win than regular solitaire! The object of this game is to discard all the cards by taking a pair of 2 cards and adding them up to 11. Jacks, queens and kings are only discarded when …
Resistor RJ45 Tester
This is a simple network cord tester that uses just 8 unique resistors. The values/wattage doesn’t matter as long as the meter can read them. They should be in the kiloohm range. I have made an Excel spreadsheet file that you can enter all 8 of the resistors and get the total parallel resistance. The …
Basketball pump signal injector
This is a simple signal injector that can fit inside a mini basketball pump it requires: This signal injector can come in handy for repairing radios, amplifers and old TVs and also square wave generator in a probe. Later on I will make a version that uses C1 and C2 as 470nF and R3 and …
Circuit Simulator