Categories

7400 competition entry: CMOS digital clock

Posted on Wednesday, October 19th, 2011 in 7400 contest by DP

Giuseppe built his CMOS digital clock two years ago and decided to enter it into the Open 7400 Logic Competition.

By using a 2Mhz quartz crystal and a 21bit counter he managed to make a 1Hz clock signal which drives his design. Implementing 2 binary counters programed to count to 60 he managed to get minutely and hourly pulses. The time is displayed on a 7 segment display. A schematic is available on his site.

Via the contact form.

This entry was posted on Wednesday, October 19th, 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.

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