19 Dec
2002
19 Dec
'02
2:40 a.m.
On Thu, 19 Dec 2002, Philip Pemberton wrote:
The site I mentioned above claims to have them at $10.00US/ea.
-Toth
Tony Duell wrote:
You might want to check out [http://www.speechchips.com/]. They have the
3.12MHz crystals for $3.00US/ea.
You might also be able to get away with substituting a 3.579545MHz
"Colorburst" crystal. Colorburst crystals are extremely common, and very
inexpensive. Radio Shack used to carry them as 272-1310, but they've been
discontinued like most of the other useful parts. It appears that many
folks used those crystals instead of 3.12MHz since they were commonly
available.
Somewhere I have an SPO256 (and external ROM)
which can speak the
words for a digital clock (numbers, 'hundred hours', 'wake up' (or
some other 'alarm' message) and so on)
I've got four SPO256A-AL2s - all working. I'll be damned if I can find
those pesky 3.12MHz crystals though. Best offer I had was 10 each,
custom cut. The CTS256 was
actually a pre-programmed PIC7000 (or TMS7000)
microcontroller, BTW. Or at least the pinout matched perfectly.
I'm still looking for a CTS256, just in case anyone here has a spare.
I've always wanted to make an RS232 TTS board.