| General > General Technical Chat |
| Would anyone be capable of making a barcode reader with vacuum tubes? |
| (1/6) > >> |
| Connecteur:
Just a fun thought; I'd expect it to be a big challenge requiring a good deal of creativity, if possible. |
| T3sl4co1l:
Yes. Why, how soon do you want it? And at what budget? ;) (A challenge, yes; but I can't say I'm nearly enough intrigued to do it as a freebie. Nor from transistors or ICs, seeing as ready-made solutions including optics already exist and are very affordable.) Also, what would count as satisfactory, a 1-D barcode reader with serial output (the code that was read)? Or should it be fancier or do other things? 2-D barcodes, like QR, are essentially impossible however; reliability versus the sheer number of devices required, makes this fairly intractable. You need a good bit more than an ENIAC to decode that. Tim |
| SL4P:
When I saw this, my mind immediately jumped to the old style pen/wand reader on a lead, pulled across the code by hand, but a laser scanning 1D reader would probably fall into the same category. Not easy, and certainly not small. |
| BrianHG:
Watch this series. He is making an improved version of a MC14500B micro controller in vacuum tubes only using a +24 and -12v supply. There are 19 parts so far... https://www.youtube.be/playlist?list=PLnw98JPyObn0v-98gRV9PfzAQONTKxql3 Going back further in time, here is is series on developing vacuum tube logic gates: https://www.youtube.be/playlist?list=PLnw98JPyObn057XAfTSPdvBrr86y62SnP Why does EEVBlog show a single video now? It used to allow me to provide 'Playlist' links which you could click on and your browser would open a window with the complete playlist. Something went wrong. |
| PartialDischarge:
Barcodes? The SR-71 used a optomechanical system to track stars and get worldwide positional navigation info. I don't think there are engineers alive today able to do something like this again. https://www.thedrive.com/the-war-zone/17207/sr-71s-r2-d2-could-be-the-key-to-winning-future-fights-in-gps-denied-environments https://timeandnavigation.si.edu/multimedia-asset/nortronics-nas-14v2-astroinertial-navigation-system https://airandspace.si.edu/webimages/collections/full/NAS-14V2%20ANS%20System.pdf |
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