by Rich Holoch
https://ky6r.wordpress.com/2015/02/18/remote-switched-tee-doublet/
Ladder-line antenna tuner
Impedance matching by adding/subtracting open wire transmission line
A simple antenna tuner made from switches. How to determine the “best” transmission line lengths for multi-band center fed wire dipoles.
by Cecil Moore, W5DXP
http://www.w5dxp.com/notuner/notuner.htm
Superformula
Formula generator
“The superformula is a generalization of the superellipse and was first proposed by Johan Gielis in 2003″
from Wikipedia
http://mysterydate.github.io/superFormulaGenerator/
Some superformula samples
Shadows
by tomthefnkid
TensorFlow
Google’s Open source “deep learning” engine.
By Cade Metz at wired.com
http://www.wired.com/2015/11/google-open-sources-its-artificial-intelligence-engine/?mbid=social_fb
PiTX
Transmitting FM, AM, SSB, SSTV and FSQ with a Raspberry-PI
By @F5OEOEvariste (article at: rtl-sdr.com)
http://www.rtl-sdr.com/transmitting-fm-am-ssb-sstv-and-fsq-with-just-a-raspberry-pi/
MTA.me
“Turns the New York subway system into an interactive string instrument.”
by chenalexander.com
Pianophase
Based on the first section from Steve Reich’s 1967 piece Piano Phase.
“Two pianists repeat the same twelve note sequence, but one gradually speeds up. Here, the musical patterns are visualized by drawing two lines, one following each pianist.”
by chenalexander.com
Reverse beacon network
A network of Internet connected CW skimmers that display detected signals in real time.
Send a CQ and immediately get a list of reverse beacon stations that heard your call, from around the world, with time and signal report data.
Logs are collected in a database that is accessible for research.