[sdiy] tony clark's 8 step envelope
debus at cityweb.de
Wed Apr 14 18:38:00 CEST 2004
Am Montag, 12.04.04 um 20:44 Uhr schrieb Tony Clark:
> One good thing is that as 74xx stuff starts getting obsoleted, it
> be the higher voltage parts. Swap in lower voltage equivilants and a
> new regulator and you're pretty much done. If CD4K gets obsoleted,
> there IS no substitute, lower voltage or no.
> Also, one other major factor in using TTL over CMOS is interfacing
> logic levels. I don't like CMOS logic levels as those aren't very
> "synth" friendly. Most synths don't put out gates high enough to
> +15V CMOS (11V per spec sheet), and some put out only 5V gates. So TTL
> logic levels assures compatibility with pretty much everything out
So if power consumption is a problem with 74xx, why don't you use
74HCxx or 74HCTxx?
Is this a stupid question?
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