Jonathan entered a Flickering Jack-o’-lantern for the Open 7400 Logic Competition. He recorded a video of his project, which is available below.
I used a 74HC14 to create four different square waves of different non-harmonic frequencies that were mixed together to flicker a red and blue LED.
Via the contact form.
74HC14 *rulez* :)
There seems to be no schematic for this on the site.
It the basic 7414 rc oscilator,
http://www.electronics-tutorials.ws/waveforms/generators.html
It uses a Resistor and a Capacitor.
T~1.2RC T=period in seconds