Hi guys. This is my first post on this forum so i want to say THANKS because i found much helpful advices and tips. I just hope that i will be able to contribute somehow.
My first post on this forum and i already have ignorant question. Cobaltmute i am very interested in building your proto-dac. I already have some pcm2707 and pcm1794 so i decided to build pup1. Would it be a problem to you to upload BOM in .pdf ?
I was also wondering, will the output stage give enough power to drive my gainclone with lm1876 chip ?
I also want to build pcb and i was wondering could i use prints given on the first page (with applied modification that you mentioned later) ?
EDIT
Please forget uploading .pdf file. I menage to convert xlsx file.
@chakija - I suspect any image that I posted will not work as scale would be off. My best advice it wait a little while till I get the revision of the board done.
@Those who I have acknowledged as getting prototype boards:
I got a package with chips in it from tomb today. So the next steps:
1) PM your address formatted in the PM in address label format to get the envelope to you. I will be copying it and printing it out to tape directly on the envelope. This is the simplest way to ensure that correct addresses on are envelopes.
2) In the PM include a PM that I can send the Paypal request to.
I will pack up the boards and chips and then send you the Paypal request. Once that is paid, I will drop the envelope in the mail. I'm hoping to have them all packed tomorrow night, but if not, given what my weekend schedule is already calling for, they will be completed on Monday night.
I was just having a look again on the schematic...
If you're going to do production runs, it might be a good idea to add a 22 or 47r resistor at the output of the opamp. Ultra low output impedance isn't needed for a DAC and it would shield the opamp from cables' capacitance, etc.
@cobaltmute
Thank you very much for your reply. I will wait for your revision of pcb. I also would gladly buy it from you if i was living in a Canada...
In meantime, i will collect all parts from BOM file. I hope that changes made on layout wont affect it.
don't collect all the parts for the next revision yet, unless you like extras. Some of the parts (mailing resistors and ceramic capacitors) will be changing to surface mount.
For those that have sent me addresses, your envelopes went in the mail today.
There are two that have not e-mailed me a postal address. If they don't in the next few days, I'm going to release the boards allocated to them for others.
Okay, one week to wait for an address from active people on the forum is long enough. Releasing the last two boards to others.
Going from order of interest postings, chakija and nightanole get first shot if they want the two boards. They will ship with the PCM chips. PM your address and paypal email and I will ship them to you.
If they don't take them Avro_Arrow and Billyk are the next in line.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.