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7400 competition entry: Frequency counter

Posted on Saturday, November 3rd, 2012 in 7400 contest, contest by DP

Here’s a 6 digit frequency counter by Yi, entered into the Open 7400 Competition.

During the Winter break my dentist convinced me that I needed to have my 2nd wisdom teeth removed. Having done this previously without much pain, I thought it would be a good idea. It turned out to be much more involved and I was out of commission for 2 weeks which was no fun at all. I was in bed most of the time, but one day I made myself get out of the house to buy the temperature controlled soldering iron that I’ve always wanted. I needed an excuse to use the soldering iron so I figured that I might as well as make a frequency counter which is something that I’ve always wanted, but lacked in my lab.

This entry was posted on Saturday, November 3rd, 2012 at 11:00 am and is filed under 7400 contest, 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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Recent Comments

  • KH: Really? They are digital inputs driven by an MCU. The MCU GPIO probably has diode clamps and ESD protection. Have you experienced such failures? Please...
  • KH: Neither. Google "Marco Schweighauser’s 8-bit virtual Javascript CPU" and see the first result. Sounds more like a very limited feature toy CPU.
  • Alan: "8-bit x86 like CPU" - isn't that an 8080, or Z80?
  • Geoff: Is it still Sunday somewhere? If so, yes please.
  • hli: Sunday++