Michel, Nick is correct it has been around for quite some time. I found out about it since I had an interrest in the large vector screens, like the Tektronix 4010 vector screen, and a few other screens made by computer companies which were hooked up to our large computers in the computer club I spent a lot of time in.
I later programmed a face similar to the Master program in the TRON movie that spun around on these screens and when the opportunity arose in this hardware/software course we searched some more with those vector/lissajour screens as a base and found schematic diagrams similar to the ones in the book I mentioned above. But we decided on a software and digital to analogue hardware solution instead of discrete wave forming with small transformers and a lot of discrete components. /Martin On 15 Feb, 12:46, Nick <[email protected]> wrote: > On Feb 15, 11:28 am, Cobra007 <[email protected]> wrote: > > > > During my studies in the mid 80's we made a similar clock in a course > > > about VLIW processors (Very Large Instruction Word) where we also used > > > lisajours to display the numbers on an oscilloscope screen. > > > Did you do that in the same way? I mean, divide a digit (or symbol) > > into separate segments and compose a Lissajous curve for each segment? > > I thought it is a very smart and unique way to display numbers on an X- > > Y system and actually assumed that David himself came up with this > > "invention". If you take the number '2' for example, the way I see it, > > it is composed out of 3 segments (top arc, middle curve and bottom > > line). You will need to switch (at precise moments) between cos, > > 0.5*sin then cos, -sin then cos, 0*sin or something similar. > > The technique of building glyphs with segments of curves & lines was > used back in the 50s in tube graphics display drivers. > > There are a few app notes out there on this - I know we've had this > discussion before years ago on the old Yahoo group... > > Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
