Comments on: Blue LED Clock http://www.neufeld.newton.ks.us/electronics/?p=57 Sun, 08 Dec 2024 17:19:24 -0600 hourly 1 http://wordpress.org/?v=3.1.3 By: Keith Neufeld http://www.neufeld.newton.ks.us/electronics/?p=57&cpage=1#comment-22820 Keith Neufeld Thu, 12 Feb 2009 14:07:37 +0000 http://www.neufeld.newton.ks.us/electronics/?p=57#comment-22820 Commander Data, that's very cool. When I was a kid playing with 7400-series digital logic circuits, my brother and I had different generations of Tyco slot car tracks. I bought the parts and always intended to build a two-digit seven-segment lap counter, but never got around to it. That sure brings back memories. Commander Data, that’s very cool.

When I was a kid playing with 7400-series digital logic circuits, my brother and I had different generations of Tyco slot car tracks. I bought the parts and always intended to build a two-digit seven-segment lap counter, but never got around to it. That sure brings back memories.

]]> By: Commander Data http://www.neufeld.newton.ks.us/electronics/?p=57&cpage=1#comment-22819 Commander Data Thu, 12 Feb 2009 14:05:10 +0000 http://www.neufeld.newton.ks.us/electronics/?p=57#comment-22819 When I was doing digital design circuits using 74xx series, I designed a clock using BCD counters and drove the LEDs using open collector ICs driv ers. Your project just reminded me of it. The clock was used to time soap box derby races before Laser diodes was invented (or perhaps it has but not as prevalent and available as now.) When I was doing digital design circuits using 74xx series, I designed a clock using BCD counters and drove the LEDs using open collector ICs driv ers. Your project just reminded me of it. The clock was used to time soap box derby races before Laser diodes was invented (or perhaps it has but not as prevalent and available as now.)

]]>