Design an analog filter by experimenting with the s-plane poles and zeros of a transfer function. Remember, the poles of a causal filter must be strictly in the left half of the complex s-plane. You can also try pre-made Butterworth and Chebyshev low...Read More

When analyzing continuous-time linear systems, the Laplace transform is used to work with signals in the frequency domain. The Laplace transform can be thought of as the Fourier transform generalized to complex frequencies. X(s) = L{x(t)} = integr...Read More

A Quine is a computer program which produces its own source code as the (only) output. With the help of printf(), we can make a quine in 117 bytes of error- and warning-free C code (tested GCC 4.2). #import<stdio.h> main(){char*s="#impor...Read More

Are you an iPhone developer? Have you ever admired that fancy-shmancy table view in the built-in Mail app? You know, the one that has a little checkbox control on the left side of every row in editing mode?...Read More

Yet another cellular automata utility -- this time it's a cross-platform C file: BMPautomata.c. Here's how to run it in OS X and get a nifty image like the background here: http://twitter.com/vitanza. Download the file to your desktop. Open ...Read More