This light-weight Electronics Engineering Calculator app is pretty neat and good. It works on many platforms such as Android, Linux, and Windows. The app contains every calculator found on the calculator page on this site. The android version is not on google play yet, and I don’t know if it ever will. You can download …
This plugin uses the linux say command to say chat messages, lets you know when some joins or quits, etc.. It requires the gnustep-gui-runtime and python To install the gnustep runtime you can type this in on ubuntu: then you can test to see if the say command works by typing Then if that works …
Here you will find a archive of lots of components that were left out of the app but were hard to find it in a zip file of all of them. So now you can download the whole tar file off of Google Drive or pick and choose the ones you want from the preview. …
This tiny shell script will allow you to backup the settings and programs from a live linux session to two .tar files. Here’s a list of the tar files and what they do. config/data.tar – Configuration and settings files. (/var and /usr directories) if any of the files in data.tar exists it will be overwritten. …
I had a 6vdc power supply laying around and John Zogg(my friend) wanted to power his scanner from both batteries and power supply. The power supply didn’t have the correct connector. So what could I possibly do to safely run it off of the batteries and power supply at the same time? So I got …
This is a simple yet effective resistor decade box. The resistors are connected in parallel with the SPDT/SPST switches. The resistance is the sum of all switches opened(NOT CLOSED!). When resistors are in series the resistances add up. $$Rt=R1+R2+R3$$ And when they are in parallel the total resistance decreases: $$Rt=\frac{1}{\frac{1}{R1}+\frac{1}{R2}+\frac{1}{R3}}$$ Rt is the total resistance …
I wanted a solution for making my visitors easier for them to order parts to build my projects. This code comes from the “Order By Part#” Page. Heres an example of how to use it: Heres the source code of the utility: Real Example
This circuit takes 3.7vdc and converts it to about 18kv. The transistor is used for the plasma speaker. It’s basically a Single-Ended Class A Audio Amplifier. The 500-ohm pot adjusts the voltage sent to the converter. The pot must NOT go over 500 ohms because then the voltage could be too high. The circuit is …
When I got John zogg’s DVD player it didn’t come with the AC adapter, just the carrying case, battery and the car Cord. At first I thought that it would of charged on 12vdc, but no it has to be 9vdc. So what I did is buy a adjustable voltage regulator, heatsink and a couple …
Here is my plan for John Zogg’s battery charger. It uses 3 analog inputs for each battery cell. I decided to use this one that flyback found on the internet is because it can turn off when it is done. It has a temperature sensor. It uses an Arduino Uno to control it. USB is …
Circuit Simulator