A Parallel Port Stepper Motor Driver With Discrete Components
Using PC’s parallel port is a convenient way to control a stepper motor. For unipolar stepper motors, up to two […]
An Isolated MOSFET Serial Port Relay Controller
Using DTR (data terminal ready) and RTS (request to send) pins of a PC serial port (RS-232) without actually using […]
Building a Degaussing Coil
One of my older CRT TVs does not have a built-in degauss button and after sitting in the corner of […]
The Simplest MOSFET On/Off Switch
A touch sensitive on/off switch can be made with a single MOSFET. The following schematics illustrate such a switch using […]
My First Few Days With Chrome for Linux Beta
When Google Chrome beta for Windows was first released last September, I tested it briefly on a Windows XP box […]
A Hall Effect Magnetic Field Polarity Detector
Hall effect sensors can be found in many common household gadgets. Most brushless DC motors for instance, like those used […]
A Simple Thread Barrier Implementation
Sometimes a group of concurrently running threads may need to rendezvous at a certain point in time before they can […]
A Simple Program for Finding Palindromic Prime Numbers
A palindromic prime (palprime) is a prime number that is also palindromic. So out of curiosity I wrote a simple […]
CFL Capacitor Problem
Many of you may still remember the capacitor plague that caused massive motherboard failures back in the early 2000s. While […]
Weekend Ubuntu Upgrade
Karmic Koala was released into the wild last Thursday, so naturally I was going to upgrade my desktop installations at […]
Windows Administrative Share With Samba
In a heterogeneous computing environment (e.g. Linux and Windows), it is necessary to use Samba to share files between the […]
An Alternative Illustration of Prime Number Distribution
Prime number theorem dictates the asymptotic behavior of prime number distributions. In layman terms, the distance between prime numbers increases […]
Why Current EVs Do Not Make Sense From Economical And Environmental View Points
About two years ago, I blogged about why hybrids were not saving us any energy by taking into consideration the […]
Strange Windows Authentication Behavior
I was writing an ASP.Net 2.0 web application using Windows authentication (since I needed to capture users’ credentials). The web […]
Monodevelop on Ubuntu 9.04
I am running Ubuntu 9.04 64bit. One thing I noticed is that the integrated debugger is behaving quite flaky for […]