Simple External Powered USB Port
I recently bought a TrendNet TK-207K KVM switch. After hooking up my mouse and keyboard, I was suprised to find […]
4KHz-170MHz Wide Band RF Signal Generator – II
Continue with my previous article, let me first explain the code a little bit.
Hex/Bin/Dec Converter And Calculator
When working with micro-controller projects, it is often necessary to perform calculations in binary and hexadecimal forms. While almost all […]
Wide-band RF Field Strength Meter
Field strength meter is extremely useful when working with RF devices. It can be used to quickly diagnose whether a […]
My New DS1052E Oscilloscope
I used to own an all-transistor, single channel 10 MHz analog oscilloscope. While it was not adequate by nowadays standard, […]
Weekend Server Upgrade – Update
Well, there is an old saying:“There’s no such thing as a free lunch.” After yesterday’s server upgrade, everything worked pretty […]
Weekend Server Upgrade
I have finally got around to upgrade my web server. The server I have been using was an old Pentium […]
The Case For Using Parallel Programmer
This is what I ran into for the first time: I was flashing the chip the other day and after […]
Google PAC-MAN
The Google PAC-MAN logo is actually a live game!
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 […]