meuchen@grad2.cis.upenn.edu (Paul Eric Menchen) (02/17/90)
In article <216@brain.UUCP> root@brain.UUCP (Chuck Shotton) writes: ... >3) a source for the ceramic resonator listed in the parts list. I can't find > this thing anywhere. The factory, muRata Erie, won't sell direct, and all of > their distributors have minimum orders of $200. I'm also looking for this. If anyone else out there has any info on a source, please e-mail me. ALSO, e-mail if you would like me to get you one. The EE labs here at Penn might buy some of these if I can sell some of them. Hopeful scenario goes like this: EE lab buys 40 to meet minimum order (maybe they can negotiate or buy some other things too-they buy a lot of stuff). I sell 30 of them for the lab. You get a crystal, I get a crystal, and the lab only ends up with 10. I'm not looking to make any money, just cover the costs. Paul Eric Menchen meuchen@grad1.cis.upenn.edu
rich@sdchemf (Richard Kanner) (02/20/90)
In article <20509@netnews.upenn.edu> meuchen@grad2.cis.upenn.edu (Paul Eric Menchen) writes: >In article <216@brain.UUCP> root@brain.UUCP (Chuck Shotton) writes: >... >>3) a source for the ceramic resonator listed in the parts list. I can't find >> this thing anywhere. The factory, muRata Erie, won't sell direct, and all of >> their distributors have minimum orders of $200. > >I'm also looking for this. If anyone else out there has any info on a >source, please e-mail me. ALSO, e-mail if you would like me to get > I too am looking for the all important ceramic resonator. I called Newark and they called muRata Erie to see about ordering the part. They informed me that muRata Erie, did not have any of these parts in stock and that in order to obtain the all important ceramic resonators there would be a 1000 pc min order at $0.60/pc. and they would start a production run. Oh well so much for an easy to build Sound Input Device. May be there is a substitue for the muRata Erie part number. R. Kanner UCSD Chem
wille@hpccc.HP.COM (Ross Wille) (05/03/90)
SID hackers- Shouldn't the A/D converter have a sample & hold in front of it? Since it is using successive approximation, the input should be stable during the entire conversion time. Maybe the A/D has a built-in S&H but I'd think not. Maybe it just works well enough with out one. Anybody know? -Ross
mikec@wheaties.ai.mit.edu (Mike E. Ciholas) (05/03/90)
In article <11220003@hpccc.HP.COM> wille@hpccc.HP.COM (Ross Wille) writes: >Shouldn't the A/D converter have a sample & hold in front of it? Since >it is using successive approximation, the input should be stable during >the entire conversion time. Maybe the A/D has a built-in S&H but I'd >think not. Maybe it just works well enough with out one. Anybody know? > >-Ross The ADC0831 has a sample and hold on it, when the conversion start pulse comes, it samples for one high period of the conversion clock, then ignores the input. Very nice chip, all in all. Look for a posting soon about SID circuit board status. Don't anybody out there try to buy a 1.558MHz thingy! (hint :-) Mike Ciholas email: mikec@ai.mit.edu snail: 289 Highland Ave, #108/Somerville, MA 02144 phone: (617) 623-3563 air: N1909C, 1954 Cessna 170B