Anyone have any idea how to choose a crystal for this project ?
http://little-scale.blogspot.com.au/201 … odule.html
Maybe it's in the tutorial, and I missed it ?
Maybe it's something stupid I missed ?
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kansas city
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ad-hell-aide
I would suggest a crystal oscillator of either 1.83 MHz, 2.0 MHz, 1.0 MHz or 1.5 MHz.
I've found that 1.83 MHz ones are easy to source where I live.
The SN76489 is pretty happy with a variety of clock speeds and sources.
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ad-hell-aide
haha well the last time i bought 30 sn76489's from ebay, only 10 worked...
cheap == cheap == crap
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FRANCE
little-scale wrote:
haha well the last time i bought 30 sn76489's from ebay, only 10 worked...
cheap == cheap == crap
that is WHY I double check 
so any good site that sell NOS or anything ?
I found one in the past but forget to bookmark...
Last edited by Aly James (May 8, 2013 2:00 am)
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ad-hell-aide
I've always been happy with the chips I've bought from http://www.arcadechips.com/ - I've bought quite a few sound chips, and they've always worked...
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FRANCE
little-scale wrote:
I've always been happy with the chips I've bought from http://www.arcadechips.com/ - I've bought quite a few sound chips, and they've always worked...
checked
no SN76489 for now , but they have a bunch of nice DAC might be cool for some of my guitar bite crushing stuff...
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kansas city
ive got a handfull of the chip, but the crystal is really hard to find.
what did you source from?
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kansas city
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Bristol
I got the crystals from RS Online Uk, and sourced the SN chips from eBay... Though I may purchase some more with Little-Scales noted failure rate!
Oddly I couldn't find one supplier of Teensy boards in the UK.
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kansas city
liquidcalm wrote:
I got the crystals from RS Online Uk, and sourced the SN chips from eBay... Though I may purchase some more with Little-Scales noted failure rate!
Oddly I couldn't find one supplier of Teensy boards in the UK.
we could use any arduino board though, right?
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kansas city
does the code change if the crystal runs at 1.8 instead of 1?
Last edited by DUNGEONMASTER (May 9, 2013 8:00 am)
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ad-hell-aide
I think I'll rewrite the code for pitch --> frequency conversion derived from a master clock.
I'll also port it to Arduino (will be super simple).
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ad-hell-aide
The 1MHz crystal means a much lower pitch range, which is AWESOME
DO WANT