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.

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