Year: 2011

Elegant 555 Radio

Elegant 555 Radio

As an entry to the 555 contest, Flickr member eschlaep has put together a beautiful AM radio: The 555 timer is configured as a pulse width modulator in a non-traditional configuration. If I used the standard approach and connected the input to the CV pin, the low impedance of the pin would prevent the circuit […]

Escher’s Waterfall Video Illusion – An Explanation?

Escher’s Waterfall Video Illusion – An Explanation?

Two weeks ago we covered YouTuber mcwolles‘ remarkable full-motion illusion appearing to show M.C. Escher’s impossible Waterfall in real-time operation. Those of you hungry for an explanation may be interested in this diagram from Boing Boing reader David Goldman, who thinks the video was shot using forced perspective, with a model as illustrated, in two cuts spliced together at the 0:45 mark.