https://www.100parsecs.net/blog daily 1.0 2017-05-01 https://www.100parsecs.net/blog/2017/3/22/cmos-nixie-tube-clock-project-part-2 monthly 0.5 2017-04-02 https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1491107234307-02C6KGINLPZ1BGM2BIV6/image-asset.gif Blog - CMOS Nixie Tube Clock Project: Part 2 Binary counter (credit: Wikimedia Commons, author: Ephert) https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1490504523171-F38A2VGXQQUUV43ED6AG/image-asset.png Blog - CMOS Nixie Tube Clock Project: Part 2 Circuit diagram for timebase. Note that all labels with the same name are connected together. Consists of a CD4060 binary counter (upper right) attached to a quartz crystal oscillator circuit, with an extra flipflop (CD4013) tacked on. https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1491108335516-NXHNLTW9V3288SIV3CMP/Seconds+and+Minutes+Counter.PNG Blog - CMOS Nixie Tube Clock Project: Part 2 Seconds and minutes counter section of clock circuit. Note that all labels with the same name are connected together.The "1MIN" output of the seconds counter doesn't match the name of the "1MIN_Tick" input of the minutes counter because I have some logic in between to allow the user to insert pulses using a push button in order to set the minutes on the clock. https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1491148349550-N63AMKWWIZVCXJNZPCBG/Hours+Counters+2.PNG Blog - CMOS Nixie Tube Clock Project: Part 2 24-hour and 12-hour counter circuits. The CD4518B chips are dual BCD counters. The CD4081B chip is a quad 2-input AND gate. The CD4002B chip is a dual 4-input NOR gate. And the CD4071B is a quad 2-input OR gate. For the 24 hour counter, the counter just resets to zero when it reaches 24. For the 12 hour counter, there is no such thing as 0 o'clock, so we need to force it to display "12" instead of 0. https://www.100parsecs.net/blog/2017/3/14/cmos-nixie-tube-clock-project-part-1 monthly 0.5 2017-04-02 https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1489531970779-QVWYRIH6QMKZJNLL51LB/image-asset.jpeg Blog - CMOS Nixie Tube Clock Project: Part 1 One of the Nixie tubes from my old frequency counter https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1489551254337-RPDH2ABVRK8LGG86A18Z/image-asset.jpeg Blog - CMOS Nixie Tube Clock Project: Part 1 Power supply from Instructables article. One thing to note, even though the rotary switch I'm using to switch the inputs on the tube is on the ground side of the Nixie tube, only one of the pins (the one connected to the illuminated digit) is actually grounded; the ungrounded pins are still floating at 60 to 100 V. Fortunately, I didn't die, but in retrospect, I should have mounted the switch such that I didn't have to risk touching the solder lugs in order to actuate it. https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1489550420308-1DQGYPX12VXQ5SGJGZY4/image-asset.jpeg Blog - CMOS Nixie Tube Clock Project: Part 1 Breadboard version of Threeneuron's Nixie power supply https://www.100parsecs.net/blog/2017/3/4/simple-box-kite monthly 0.5 2017-03-23 https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1488656413578-G42NV7YJJTM41KYNAQ9L/image-asset.jpeg Blog - Simple Box Kite Box Kite (Credit: Pearson Scott Foresman -from Wikimedia Commons) https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1488698672163-C96QE4JI937KPDM1DEV3/image-asset.jpeg Blog - Simple Box Kite Progression of kite build from just the spars, to spars and structural rigging lines, to complete with sails https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1489516886777-298RUXGGDO5YW7HH1YPR/Finished+Box+Kite1.jpg Blog - Simple Box Kite Finished kite with coat of silver paint https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1488656794408-0U3MH3KF7LPD7DYXYT8W/Box+Kite+Design.jpg Blog - Simple Box Kite Box kite structure design https://www.100parsecs.net/blog/2016/12/24/hello-world monthly 0.5 2017-03-23 https://www.100parsecs.net/blog/category/News+and+Notes monthly 0.5 https://www.100parsecs.net/blog/category/Projects monthly 0.5 https://www.100parsecs.net/blog/tag/electronics monthly 0.5 https://www.100parsecs.net/blog/tag/box+kite monthly 0.5 https://www.100parsecs.net/blog/tag/Nixie+tube monthly 0.5 https://www.100parsecs.net/blog/tag/kite monthly 0.5 https://www.100parsecs.net/photos daily 0.75 2016-12-13 https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1482713561221-LY34OYXWT9CXR924ZCV3/Saturn+V.jpg Photography https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481590582520-1MQIN40QGQZYFCG2YCJP/Panorama+1+-+small.jpg Photography https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481590755695-3A6H366NAJ4JA1ALBB57/Nov+11+Sunset+-+HDR.jpg Photography https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481591024010-NZDN1GK9UMR2C7XJW8G7/Saturn+V.jpg Photography - Rocket Park Saturn V in Rocket Park at Johnson Space Center https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481605256617-LOIMSROGHX0V72W31D86/3rd+Stage+Engine.jpg Photography https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481605348764-1HHKJCLVBFDADDXCMQ9P/Benton+for+Scale.jpg Photography https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481605375427-6PSZE8XRP0BEAVH3C5JF/Lunch+Break+Panorama+2.jpg Photography https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481605445577-D9EL0GXWFXMB31AHYKAQ/Fungus.jpg Photography https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/1481605497069-STHDPGD6YOD1EM4M591L/Sunrise+from+the+Plane.jpg Photography https://www.100parsecs.net/about daily 0.75 2024-07-28 https://images.squarespace-cdn.com/content/v1/584d707d59cc6892ae0a9ced/189bc325-2133-437c-8dd1-dd778744fbaa/20240629_164903.jpg About An outing to Audubon Zoo https://www.100parsecs.net/licensing daily 0.75 2016-12-13 https://www.100parsecs.net/professional daily 0.75 2024-07-28