Two ways to use an LED as a light sensor with Arduino(blog.jgc.org)

134 points by jgrahamc 2 years ago | 61 comments

The inner beauty of a Tesla Stropkov DS 3600 telephone from the early 1980s(blog.jgc.org)

106 points by jgrahamc 3 years ago | 71 comments

My daily driver is older than I thought; it's positively vintage(blog.jgc.org)

46 points by jgrahamc 2 years ago | 91 comments

My primality testing code is faster than Sir Roger Penrose's(blog.jgc.org)

109 points by jgrahamc 2 years ago | 24 comments

Kelly Rowland couldn't have used the =HYPERLINK() function to message Nelly(blog.jgc.org)

804 points by thepbone 3 years ago | 280 comments

John Graham-Cumming blog post explaining why Kelly Rowland's Excel-texting scene in the Dilemma video on a Nokia 9210 Communicator couldn't work via =HYPERLINK().

Is a movie prop the ultimate laptop bag?(blog.jgc.org)

230 points by jgrahamc 1 year ago | 233 comments