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Curated by: Alexander the ok (46 videos)
More Soviet-era display antics with Numitron tubes. Filmed while I wait for the next revision of my driver board for the neon plasma display. Numitrons were invented in the late 1960's by RCA in the USA. They didn't see a huge amount of use as they were quickly superceded by LEDs. However, they were manufactured en-masse in the Soviet Union and new, unused tubes are still available today in Ukraine, Latvia and other ex-Soviet countries. Here I built a device to help me monitor training runs for neural networks, along with displaying the weather....and anything else I want to display. Since I never mention it in the video, the driver chips are TPIC6B595. The full schematics are available at the linked github repo below. Chapters: 0:00 Introduction 0:43 History of Numitrons 2:15 Pros and Cons 5:42 How I'm using them 8:52 My Design 12:03 Lifetime Considerations 15:04 Final Thoughts Source code for ESP32, and PCB design: https://github.com/lambdaBoost/iv-9_keras_log_display Custom callback for Keras to send metrics over to API. Dockerfile for API server included: https://github.com/lambdaBoost/simple-tensorflow-logging Sources: Inspiration and some info on filament lifetime: https://www.dos4ever.com/numitron/numitron.html RCA Engineer; May 1972. Contains extensive info on RCA numitrons: https://worldradiohistory.com/ARCHIVE-RCA/RCA-Engineer/1972-04-05.pdf Outstanding series on the CED (it sounds like I say 'CD' in my video because of my terrible accent). Developed at the same time as numitrons and contributing to the collapse of RCA: https://www.youtube.com/watch?v=PnpX8d8zRIA&t=254s More info on the cabinet with numitron score indicators: https://www.arcade72.com/allied-hesitation-1974 Lamp rerating: https://en.wikipedia.org/wiki/Lamp_rerating Absolutely idiotic and unhelpful response to a reasonable question about design voltages. This is from more than 10 years before I filmed this but I came across it in my studies. Leaving it here as and a 'don't be this guy' tale. (for clarity, the chip does work at 3.3v): https://forum.sparkfun.com/viewtopic.php?t=20867