Have a look at the info from one Russian supplier it may be of some assistance Rex http://www.rayelec.ch/gdd.htm ----- Original Message ----- From: Nigel Goodwin To: Sent: Thursday, March 01, 2001 8:31 AM Subject: Re: [EE]: nixie tubes > In message <20010228.132730.-237529.0.haroldhallikainen@juno.com>, > Harold M Hallikainen writes > > Speaking of old technology, anyone remember the (RCA, I think) Numitron > >display? It was a seven segment display using incandescent filaments. You > >could use them just like an LED seven segment, but could not multiplex > >them without adding a bunch of diodes. > > I can't say I remember the trade name, but when I was at Technical > College in 1973 I was involved in building a project using seven segment > filament displays. It was based on a simple block diagram, using three > displays with just the horizontal filaments used, and was a simple 'slot > machine'. It consisted of ring of three counters feeding each display, > fed from astable oscillators via bistable latches. The three displays > cycled round, and you had to press three buttons to light up a single > line to win, win or lose was indicated by bulbs fed from a combination > of AND and OR gates. This was built using only discrete components, and > had to be built on plain matrix board with all wiring and components on > the top of the board. The completed machine (with a transparent perspex > top was exhibited at the college open day!. > -- > > Nigel. > > /--------------------------------------------------------------\ > | Nigel Goodwin | Internet : nigelg@lpilsley.co.uk | > | Lower Pilsley | Web Page : http://www.lpilsley.co.uk | > | Chesterfield | Official site for Shin Ki and New Spirit | > | England | Ju Jitsu | > \--------------------------------------------------------------/ > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.