Hi A few other things to consider:
The MAX 232 is an either / or with a transistor and a couple of resistors. Not a lot of money either way. I'd just go for the MAX and leave out the transistor. Putting the PIC in a skinny 14 pin socket would make things a bit easier if there are software enhancements down the road. Eventually you are going to blow out U4 (the input flip flop). I'd put it in a 14 pin socket. The clock oscillator used is going to depend on what people are trying to do with the gizmo. I suspect that a 20 or 40 MHz clock will be more popular than the 10 MHz part listed. C16 and C17 are "selects" as well. I think I'd leave the clock as is and toss in a couple of the alternate caps. ----------- I wonder if there are any parts required to calibrate the assembled unit? So many questions .... Bob On Jul 8, 2010, at 8:34 PM, Bob Bownes wrote: > I'll get these 2 corrections in tonight. I was wondering if the 3/8" > parts would fit. > > On Thu, Jul 8, 2010 at 8:07 PM, Bob Camp <li...@rtty.us> wrote: >> Hi >> >> Another thing I think we need to get on the project is Q4: >> >> 512-2N7000TA Farichild's version at 0.13 each. >> >> Since I didn't create the project I don't seem to be able to edit it .... >> >> Bob >> >> >> On Jul 8, 2010, at 7:26 PM, Richard H McCorkle wrote: >> >>> Bob, >>> Instead of the 3266 series go to the 3296 series >>> >>> 5K Trimmer, top adjust >>> 652-3296W-1-502LF 7100 in stock >>> 652-3296Y-1-502LF 590 in stock >>> >>> 200 Trimmer, top adjust >>> 652-3296W-1-201LF 1090 in stock >>> 652-3296Y-1-201LF 830 in stock >>> >>> Richard >>> >>> >>>> Hi >>>> >>>> The real question somebody needs to answer is - will it work with side >>>> adjust >>>> trimmers? If not, then we're going to have to find another source to get >>>> the >>>> trimmers from. >>>> >>>> The project on Mouser shows the 3266p trimmer. AFIK the correct part is >>>> the 3266w. >>>> The board also appears to be laid out for the 3266y. Another alternative >>>> is the >>>> 3266x. All the details of what's what are at: >>>> >>>> http://www.bourns.com/data/global/pdfs/3266.pdf >>>> >>>> My guess is that the 3266p isn't going to work. The 3266y is even harder >>>> to get >>>> than the 3266w. The 3266x looks problematic when you go to do the >>>> adjustment >>>> >>>> Rational solutions: >>>> >>>> 1) Jameco shows the 3266w as "ships today" in 5 K ohms. Who knows how many >>>> they >>>> actually have.... >>>> 2) 3266w is available in the 2K ohm flavor at Mouser (lots in stock). If >>>> you change >>>> R16 and R23 to 1K ohms, the 2K pot should work fine. That makes them the >>>> same >>>> value as R5 and R6. One fewer line item ... >>>> >>>> I'd vote for option 2. >>>> >>>> Bob >>>> >>>> >>>> >>>> >>>> On Jul 8, 2010, at 2:55 PM, Lester Veenstra wrote: >>>> >>>>> Safe to get in the water yet? >>>>> >>>>> >>>>> >>>>> Lester B Veenstra MØYCM K1YCM >>>>> les...@veenstras.com >>>>> m0...@veenstras.com >>>>> k1...@veenstras.com >>>>> >>>>> >>>>> US Postal Address: >>>>> PSC 45 Box 781 >>>>> APO AE 09468 USA >>>>> >>>>> UK Postal Address: >>>>> Dawn Cottage >>>>> Norwood, Harrogate >>>>> HG3 1SD, UK >>>>> >>>>> Telephones: >>>>> Office: +44-(0)1423-846-385 >>>>> Home: +44-(0)1943-880-963 >>>>> Guam Cell: +1-671-788-5654 >>>>> UK Cell: +44-(0)7716-298-224 >>>>> US Cell: +1-240-425-7335 >>>>> Jamaica: +1-876-352-7504 >>>>> >>>>> This e-mail and any documents attached hereto contain confidential or >>>>> privileged information. The information is intended to be for use only by >>>>> the individual or entity to whom they are addressed. If you are not the >>>>> intended recipient or the person responsible for delivering the e-mail to >>>>> the intended recipient, be aware that any disclosure, copying, >>>>> distribution >>>>> or use of the contents of this e-mail or any documents attached hereto is >>>>> prohibited. >>>>> >>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- time-nuts@febo.com >>>>> To unsubscribe, go to >>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>> and follow the instructions there. >>>>> >>>> >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>> >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.