Author Archives: louic

Some xmgrace tips

Xmgrace is a very nice piece of software to create publication quality figures. Even better is that it stores your data and graph layout options as plain text (which is especially nice in combination with subversion or scripts to edit … Continue reading

Posted in linux, science | 53 Comments

Splitting a pdf-file under Linux

The pdftk command (pdf toolkit) can perform many operations on pdf files. One that I found useful is extracting certain pages from a pdf file. For example, to extract page 115-142 from input.pdf and save it as chapter5.pdf, the command … Continue reading

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Free SMTP server using gmail

How to use a free SMTP server that is accessible from anywhere, using your gmail account? This may be useful if you are at a location where there is internet, but no (known) SMTP server as is the case for … Continue reading

Posted in internet | Leave a comment

Draw a helical wheel plot from a pdb file

Many programs are available that draw helical wheels from a given peptide primary structure (sequence), assuming a perfect alpha helix. Sometimes it may be interesting to see what the helical-wheel plot of a non-ideal helix looks like. Because I could … Continue reading

Posted in science | 6 Comments

Setting fuse-bits on Atmel Atmega8 AVR

The second thing most people do when they start programming microcontrollers is to try and use an external crystal as a clock source. And many beginners start by setting the wrong fuse bits, so that the AVR expects an external … Continue reading

Posted in atmega | 33 Comments

Installing avrdude on a Gentoo box

This post describes how to install avrdude on Gentoo Linux. Avrdude is software to "burn" a program on a microcontroller. I am using a MyAVR programmer board that is connected to the parallel port. I started out by following the … Continue reading

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Installing DSL on an old (16Mb RAM) laptop

A couple of days ago, I removed the dust from my old laptop, and installed Linux on it. I chose to install the damn small linux (dsl) distro and encountered some (small) problems during installation, which I describe below. Since … Continue reading

Posted in linux | 4 Comments

Useful things in (gentoo) linux

This is just a collection of some commands and tricks that I keep forgetting Search and replace in multiple files, using perl perl -p -i -e 's/search/replace/g *.txtperl -p -i -e 's/search/replace/g *.txt Change the color of a (gentoo) bash … Continue reading

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Convert a LaTeX-created .pdf file to MS-Word .doc

Unfortunately, sometimes people want me to convert some beautiful LaTeX to MS-Word. I first tried to convert the .tex to .html and open the html file in MS-Word, but the result was usually a big mess. The best way I … Continue reading

Posted in latex, linux | Leave a comment