USB Null Power Supply

One time I read an Nuts and volts article where this guy took a usb cord and unhooked the +5v(red wire) and made it where the arduino can be powered by an external power supply without breaking anything.. This can be also handy for power hungry devices(such as external dvd burners,etc). This will draw nothing …

When an soundcard probe uses wrong polarity on android/chromebooks

In this blog I will review the Virtins Soundcard probe using it on a chromebook. Chromebooks use a 4-pin headphone not a 3-pin connector like PCs and regular laptops use. Here comes the interesting part when measuring a sawtooth wave it was going backwords seen on figure 1 What can that do to the circuit? …

Pythagorean Transistor Circuit

Here’s a circuit that Joerg from the electronics chat shared with me. The circuit outputs a current and inputs a current for the variables in the Pythagorean equation. Pythagorean theorem solves for the hypotenuse of a triangle. The currents in the circuit are the same way where C is the hypotenuse in amps I(A) is …

Simplest analog computer

In this post I will show you how to make a analog computer using just resistors, switches and a 100 micro ammeter. Here’s the schematic of it: You can see the idea on how this analog computer works, it uses ohms law to get current from resistors in the circuits. Each current is limited in …

Collection of Oregano’s Model files

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. …

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