Categories

7400 competition entry: Flickering Jack-o’-lantern

Posted on Friday, October 21st, 2011 in 7400 contest by DP

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.

This entry was posted on Friday, October 21st, 2011 at 10:00 pm and is filed under 7400 contest. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

3 Responses to “7400 competition entry: Flickering Jack-o’-lantern”

  1. Alvaro says:

    74HC14 *rulez* :)

  2. Drone says:

    There seems to be no schematic for this on the site.

  3. Filip says:

    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

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • lostengineer: hahaha an entire article just saying to heat-shrink your wires or glue them if they might move around a lot. When did common sense die?
  • readybrek: They're tasty tasty very very tasty... they're very tasty.
  • hli: Sunday++
  • Chamod: Check on your buddy. Make sure they don't forget their lunchbox.
  • Kurt: But February made me shiver With every paper I'd deliver Bad news on the doorstep I couldn't take one more step