There are many Arduino-compatible microcontroller boards nowadays. The Ruggeduino is a ruggedized Arduino-compatible microcontroller board. Features include overcurrent and overvoltage protection on all I/O pins and 5V/3.3V outputs, ESD protection on all I/O pins and USB port, total microcontroller overcurrent protection, and operation at up to 24V. There are some things a regular Arduino will

Arduino UNO review

I have participated in Free Product Road Testing program by Farnell. Farnell indentified my blog to road test some of their products. I was willing to participate, because what’s more fun than free high tech products to test. The first product i got was Arduino UNO. Arduino Uno is a a microcontroller board based on

Elisa Viihde downloads

I have been using Elisa Viihde service for almost a year and I can say I am pretty happy with it. After upgrading to this service also my Internet connection from Elisa started working without too much problems (earlier it worked badly for long time). Elisa Viihde allows me to record TV programs to Elisa

Nokia N9 Meego phone

I have earlier written about MeeGo Linux and how Nokia’s work on Meego is fading. Nokia has promised to release one Meego phone this year, and there has been many rumors on that device. Nokia has finally revealed some details on their Meego phone. Nokia Introduces MeeGo-Powered N9 Phone. For details check this Nokia N9

UT-81B multimeter/oscilloscope

UT81B from Uni-Trend is a scopemeter. It is a multimeter with some basic oscilloscope functions. This multimeter can measure what you expect from a normal multimeter: DC V up to 1000V, AC up to 750V, resistance up to 40Mohm, frequency up to 10MHz, capacitance 100uF, AC/DC current 10A (and of course it has also a


Have a bad habit of overwhelming Firefox with a few dozen too many tabs? So you keep open tabs like libraries keep books… Aren’t you afraid Firefox will consume all your memory? Don’t you fear browser restarts because it takes so long to reload all your tabs? BarTap for Firefox keeps background tabs from loading

Saleae Logic Analyzer

If you’ve ever had a problem getting two chips to talk, or wanted to reverse engineer a protocol, a logic analyzer is the right tool for this. Logic analyzer only detects digital high and low digital states, it records many signals simultaneously and allows to dump data to a computer for analysis. Logic analyzers can

TDR kit built

My Time Domain Reflectometer (TDR) circuit has been available as kit made by Far Circuits. The kit consists only of circuit board and components needed to build the circuit in a small plastic bag (you need to download the building instructions). The original circuit design is from my web page and Far Circuits added 5V

XLR connectors

The XLR connector is an electrical connector design used mostly in professional audio and video electronics cabling applications, for microphones and line level signals. The most common is the three-pin XLR3, used almost universally as a balanced audio connector for high quality microphones and connections between equipment. XLR connectors are superior to many other audio