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Designing a PCB
Posted on April 15th, 2009 CommentsOne of the things I wanna learn this month is to build hardware circuit on a pcb with commercial CAD software which are used to build circuits. The coolest thing about PCB software is that you can actually simulate a circuit without making the real hardware circuit. and it helps you analyze faults before you produce your circuit. I had designed a small PCB for SPI interface of an MMC/ SD card to a microcontroller. It was easy to design as there was no special circuitry needed for except for a few optional pull up resisters which should be used if the BUS is in open drain mode. If it is in push pull mode then there is no need of using pull up resistors. It all depends on which microcontroller we are using. If we are using a low end microcontroller like a PIC which is cheap we must use a Pull up on the data lines of the SPI bus. On the other hand if we use a High end microcontroller, it may provide options so that we dont need pull-ups. Overall PCB design a must learn thingy if you are into hardware and serious about becoming a hardware engineer.
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Blogging and techonology
Posted on January 4th, 2009 CommentsI dont think people who blog are really computing literates cause knowing some html or php doesnt make one a computing nerd. HTML is one of the first language one can learn besides visual basic (a language for beginners). There are many other things besides html :/ which are far difficult to understand. Moreover.. people have got accustomed to techonology thesedays and knowing how to blog or how to code in a programming language isn’t the greatest thing.. of our time.. even though it might have been a great achievement if you were in the 60’s or 70’s.. In 20 years or so.. People who are our age. in the future might do things.. which are unthinkable nowadays.. People become sophisticated in the years to come and its a natural thing.. There is nothing special about it. If you consider the first humans… on our planet. we have evolved into a more sophisticated species..and this trend will continue until our extinction…