Here is a compendium of sources for Nixie tubes. eBay, in particular, seems to have a large variety of offerings, and they're still not all that expensive.
Yes I remember the nixie's with the digits in front of one another (shows age). Then came the green 7 segment flourescent tubes. I had a bunch of them. Used the NS clock chip. Anyone remember them?
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Woohoo!!! Time Machine! Can you set that to 1977 and Press Enter?
I tried that, but it turned my kitchen green and orange, and the radio started making this horrid noise ;-)
Actually, many of the components I used were from a salvaged old counter with early 70 date codes and turned out to be DTL (Diode-Transistor-Logic), a precursor to TTL and CMOS.·
There seems to be a renewed popularity for these things now, I note that many of the ones on eBay are surplus from Russia.
There's something about display technology that I love.· One of these days I want to try and build my own Edge Lit displays...
When I worked for Rank-Xerox (UK) many years ago, the 3600 copier had a control unit which used Burroughs Beam-X tubes as decade counters driving Nixies. One of my underlings converted one into a (rather large) digital clock. Given the cost of those units, it was probably the most expensive digital clock for use in the home ever made.
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
I've done a fair amount of audio on a PIC in the past. However, it usually involved the scale of a piano (Max frequency is 4186.01Hz)
However, if you want to deal with the full audio bandwidth you are going to need a 40MSample per second. The propeller is 20MIPs per cog. You are really going to need to use a faster chip if you want to use that sampling rate.
OK for speech level stuff, but not if you want the full audio spectrum. If the sound is from a particular app then there are things you might be able to do, but if you want to do this for any audio signal of high fidelity, then you are pretty much stuck at that rate.
I use an EMU1616M DAW which handles 196KS/sec with a cardbus DSP and sound card. More than a prop could handle.
You might be able to use an external sampler and buffer the data and send groups of samples to different cogs in parallel, working on 7 groups at a time. It might be possible, but it'd be a complex effort.
And while the highest fundamental note on a piano may be 4186Hz, there is actually quite a bit above that in what you hear due to harmonics and the mechanical striking of the string.·· If you listend to a piano played through a 4.1K lowpass, it would probably sound a bit odd.
But mostly I think you've got your power of tens confused;· I think you meant 40K samples compared to 20M mips.
Comments
because the different number are lined up one atop the other.
There is an old frequency counter that I sometimes use that has those tubes.
It weighs more than my purse does
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- Some mornings I wake up cranky.....but usually I just let him sleep -
-Phil
Yes I remember the nixie's with the digits in front of one another (shows age). Then came the green 7 segment flourescent tubes. I had a bunch of them. Used the NS clock chip. Anyone remember them?
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, RamBlade, TwinBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index) ZiCog (Z80) , MoCog (6809)
· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
"Purse" is American for a handbag!
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
I tried that, but it turned my kitchen green and orange, and the radio started making this horrid noise ;-)
Actually, many of the components I used were from a salvaged old counter with early 70 date codes and turned out to be DTL (Diode-Transistor-Logic), a precursor to TTL and CMOS.·
There seems to be a renewed popularity for these things now, I note that many of the ones on eBay are surplus from Russia.
There's something about display technology that I love.· One of these days I want to try and build my own Edge Lit displays...
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
Post Edited (Leon) : 9/1/2009 10:44:07 AM GMT
However, if you want to deal with the full audio bandwidth you are going to need a 40MSample per second. The propeller is 20MIPs per cog. You are really going to need to use a faster chip if you want to use that sampling rate.
OK for speech level stuff, but not if you want the full audio spectrum. If the sound is from a particular app then there are things you might be able to do, but if you want to do this for any audio signal of high fidelity, then you are pretty much stuck at that rate.
I use an EMU1616M DAW which handles 196KS/sec with a cardbus DSP and sound card. More than a prop could handle.
You might be able to use an external sampler and buffer the data and send groups of samples to different cogs in parallel, working on 7 groups at a time. It might be possible, but it'd be a complex effort.
Good Luck.
-D
What are you smoking? A sample rate of 40Mhz? You tell us your DAW uses 196Khz and then state the propeller needs over 200 times that to handle audio?
FYI, the Propeller is quite capable of handling a 44 or 96Khz standing on one cog.
BTW, your DAW uses 192Khz not 196.
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lt's not particularly silly, is it?
But mostly I think you've got your power of tens confused;· I think you meant 40K samples compared to 20M mips.
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