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Showing posts from July, 2007

cpufreq and measuring power consumption

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Since everyone are talking about Live Earth and global warming recently, I have decided to check my personal power consumption. Other than my car, I guess the second most power consuming device is my PC. So I decided to measure how much power it consumes. Especially as I have recently discovered the cpufreqd that can adjust my Pentium 4 processor speed from 2.4GHz down to 300MHz. Unlike some hardware review sites where they could afford to buy good quality power meters like the Watts Up , all I have is just two multimeter laying around my toolbox and they can't even measure AC current. So, I also can't measure power as the method described in the article in TwistedMod . I has to create my own method to measure the current that goes into my PC. The circuit is as shown below: The resistor 5.1ohm, 5W was used because it is the only suitable resistor that is in my toolbox. Basically, any low resistance high power resistor should be suitable. The power dissipation of the resistor m...

The Economics of open source

An interesting and lively discussion thread has popped up at Ubuntu Forums with a title that is sure to invite a large reaction among the group of highly enthusiastic Ubuntu users in the forum: *deep breath* For the most unpopular opinion of any Ubuntu user, please click here. In summary, the original poster's opinion was that Ubuntu should be made closed-source so that programmers can make a lot money and improve their lives. He/She also said that by closing up Ubuntu, its quality will improve because paying more money will make things better. It is unfortunate that he/she has such opinion, which makes many other posters in the thread believe that he/she has very little understanding of the dynamics of open-source softwares. Later in the thread, he/she has indicated that he is still in college and he would wish that the software industry would be a huge money pot for everyone to join. So, I guess he/she can be forgiven for being less knowledgeable in the dynamics of the software i...