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7400 competition entry: CMOS frequency counter

Posted on Friday, November 2nd, 2012 in 7400 contest, contest by DP

Miguel sent in his entry to the open 7400 competition. It’s a CMOS frequency counter based around the CMOS 4000 series logic chips. It’s capable of counting for 1 Hz up to 1 MHz.

The project consists of a frequency counter that uses only old-school CMOS chips: 4511 display drivers, 4029 decade counters a 4521 24-stage frequency divider and a 4011 chip with 4 NAND gates. The frequency counter counts from 1 Hz to 1 MHz (999.999 KHz)

Build something that uses or abuses a logic chip and get amazing boards, tools, and other swag. The Open 7400 Logic Competition promotes awareness of the basic building blocks of modern circuits. Devious geeks ignited the computer revolution with discrete logic computers, what can you do? Details and entry form here.

Via the forum.

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