Davo Posted May 13, 2008 Report Share Posted May 13, 2008 Nils, right below the audio out there's a 5x2 header labeled U$2. Is that where the money goes in? Quote Link to comment Share on other sites More sharing options...
TK. Posted May 13, 2008 Report Share Posted May 13, 2008 I would use a PCM1725 instead of TDA1543 - availablility and quality are significantly betterBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
nILS Posted May 13, 2008 Report Share Posted May 13, 2008 Nils, right below the audio out there's a 5x2 header labeled U$2. Is that where the money goes in?Hahaha, yeah, that's the donation deposit header ;DI would use a PCM1725 instead of TDA1543 - availablility and quality are significantly betterWill look into that, thanks. Quote Link to comment Share on other sites More sharing options...
seppoman Posted May 13, 2008 Report Share Posted May 13, 2008 PCM1725: TI says Not Recomended for New Designs and suggests using the PCM1754 instead (which is only available in SSOP package :-/)Farnell also doesn't stock them anymore. findchips.com lists several sources for the US but with a quick search I found no supplier in Germany. Quote Link to comment Share on other sites More sharing options...
crisp Posted May 13, 2008 Report Share Posted May 13, 2008 well at voti.nl they still sell the desired TDA1543 for 2,50 Euro ... so where is the problem?This DAC is also used in some external CD Player DAC Projects for it's good Sound also look on Ebay the sell DAC-Kits with this Chip for xxxx Euro Prices very heavy...So I bougth some pieces from voti with no problem at all, fast shipping too...And also very easy to connect, with other DA you need extra clock and parts and so on... Quote Link to comment Share on other sites More sharing options...
puddingbrumsel Posted May 13, 2008 Report Share Posted May 13, 2008 @segor you'll find the tda's for 4,20€ in stock. i hope someones opens a bulkorder Quote Link to comment Share on other sites More sharing options...
seppoman Posted May 13, 2008 Report Share Posted May 13, 2008 well at voti.nl they still sell the desired TDA1543 for 2,50 Euro ... so where is the problem?no problem, just TK suggested that the sound quality of the PCM1725 was better.@Puddingbrumsel - 4.20 is too expensive. Another possible source for a (european?) TDA bulk order: http://www.ts-audio.de/pr_NED0008303.htmlS Quote Link to comment Share on other sites More sharing options...
swinkels Posted May 13, 2008 Report Share Posted May 13, 2008 There are in Poland for 1,93 eurohttp://tme.pl/katalog/index.phtml?f_szukaj=tda1543&idp=1 Quote Link to comment Share on other sites More sharing options...
crisp Posted May 13, 2008 Report Share Posted May 13, 2008 some say sound quality of a TDA 1543 is better that a thing you should decide for yourself and your taste of how the sound is... ;-)but an other thing is price ... look with one TDA 1543 or whatever DAC you choose you can connect TWO AVR's for Sound so the Calculation goesbetter than any original SID Chip... the Cheapest SID Chip I can get here in Germany will be around 15 Euro for the old 6581or 20 Euro for the newer 6581 R4AR or the 8580R5 ... for that money you can get a lot of AVR's and even the DAC Chips....so stop crying about the DAC Price... and start building and using them ;Dbtw. the AVR mega 8515 used in here is about 1,70 Euro bei Reichelt.de and the 24MHz Oscillator is about 1,55 Euro so for the Dualcore or Stereo SwinSID you need one DAC one 24MHz Oscillator and two AVR mega 8515 ... do the math... Quote Link to comment Share on other sites More sharing options...
seppoman Posted May 13, 2008 Report Share Posted May 13, 2008 hey crisp,I didn't see anyone crying about prices?? I only said you can get the TDA cheaper than from Segor :). Actually I don't see the SwinSid as a replacement for a real Sid because I expect a broken and dirty sound from a real Sid while I'd spend even more than for a TDA pr PCM1725 to get a really good sound from a SwinSid - for me the whole Midibox experience is absolutely not about saving money ;)S Quote Link to comment Share on other sites More sharing options...
buhler Posted May 13, 2008 Report Share Posted May 13, 2008 over here in the US, i'm having a hard time finding the TDA1543... can i join a Euro bulk order if you guys start one? :-[ Quote Link to comment Share on other sites More sharing options...
nILS Posted May 13, 2008 Report Share Posted May 13, 2008 Small update:* added swinkels' C64/mb mod* left TDA1543 in there for now* size is now standard core size (holes match as well, well 3 of them at least)* GND and +5V connections not shown (planes) Quote Link to comment Share on other sites More sharing options...
TK. Posted May 13, 2008 Report Share Posted May 13, 2008 Could it be, that J2 isn't 1:1 compatible to MBHP_SID:J2 and MBHP_CORE:J10? (10 pins instead of 8 pins)Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
nILS Posted May 13, 2008 Report Share Posted May 13, 2008 Could it be, that J2 isn't 1:1 compatible to MBHP_SID:J2 and MBHP_CORE:J10? (10 pins instead of 8 pins)Yes that's correct. Two pins are unused, but 2x5 DIL headers/cables are just more common than 2x4 :-) This is not a "final" version, and what you just mentioned is one of the things I need to check and see if it needs adjustment. Doesn't anything go unnoticed in here? ;) Quote Link to comment Share on other sites More sharing options...
Davo Posted May 14, 2008 Report Share Posted May 14, 2008 How about using a half-can oscillator so you can move up IC4 and make room for a fourth screw hole? C14 could be moved somewhere else if you don't want to be limited to a half-can. Also, something I like doing with oscillator footprints is make them capable of accepting either a half-can or full-can. Quote Link to comment Share on other sites More sharing options...
nILS Posted May 14, 2008 Report Share Posted May 14, 2008 Uh-oh, this is turning into a hijack. Could a mod please split the thread?Davo: Among the things I plan to change is adding a second footprint for the oscillator. Since the small ones are not really available everywhere, I will not remove the big one. Quote Link to comment Share on other sites More sharing options...
crisp Posted May 14, 2008 Report Share Posted May 14, 2008 Also a design suggestion for the DualCore PCB, I would put the 24MHz Oscillator as near as possible to the CLK in,so you may flip the AVRs and put the Oscillator to the left bottom side and the TDA to the right up-side...This would minimise the RF noise of the Oscillator ... I my desgin for the C64 I just put the Oscillator under the AVR but that reguires a thinner socket for the AVR ;)Just my thoughts ... Maybe you share your schematic file? For playing around with the Parts position. Quote Link to comment Share on other sites More sharing options...
nILS Posted May 14, 2008 Report Share Posted May 14, 2008 Also a design suggestion for the DualCore PCB, I would put the 24MHz Oscillator as near as possible to the CLK inIt sorta is - the whole thing is relatively small, so ideal placement is not really possible with my inferior newb-eagle-skills.so you may flip the AVRs and put the Oscillator to the left bottom side and the TDA to the right up-side...Feel free to do that ;)This would minimise the RF noise of the Oscillator ... I my desgin for the C64 I just put the Oscillator under the AVR but that reguires a thinner socket for the AVR ;)If I did this, bugfight would *whack* me. Works well for crystals, kinda hard to do with oscillators as they tend to have a higher profile.Just my thoughts ... Maybe you share your schematic file? For playing around with the Parts position.Just take the swinsid schem from swinkel's site and merge it with the mbSID schematic and you're good to go.Small update:* added J14 connector to allow for 1:1 cable* separated ground planes (for analog part)* added alternative footprint for the oscillator* canged footprints of the caps from 2.54 mm to 5.08 mm* some clean up Quote Link to comment Share on other sites More sharing options...
swinkels Posted May 14, 2008 Report Share Posted May 14, 2008 The master AVR is actually slave and vice versa. Both are ATMEGA8515, not AT89S8515 , therefore change their names to avoid confusion. Quote Link to comment Share on other sites More sharing options...
nILS Posted May 14, 2008 Report Share Posted May 14, 2008 Already noticed and fixed. I tend to notice mistakes *after* I upload a screenshot ;) I had the CS lines mixed up as well, right? Quote Link to comment Share on other sites More sharing options...
swinkels Posted May 14, 2008 Report Share Posted May 14, 2008 Yes they are swapped but no big deal. Quote Link to comment Share on other sites More sharing options...
Davo Posted May 14, 2008 Report Share Posted May 14, 2008 Hmm, I'd scoot IC4 left a bit to avoid the mounting hole. Looks a little too close. Quote Link to comment Share on other sites More sharing options...
Peake Posted May 17, 2008 Report Share Posted May 17, 2008 Syracuse Semiconductor on ebay USA have two potential deals: 100 TDA1543 for $350, or 500 for $500.00. Edit: Both Digikey and Mouser have the PCM1725, both at $1.82 for 100 quantity, but both are SOIC. Mm, 14-pins, too. Choices...Sorry to post that here; move or delete if appropriate...if I had the money, I'd just buy it and pass around the goodness..Edit to crisp's reply: You know how this goes; I'm hoping that someone will buy bulk for the inevitable 8 chip synth... The SwinSid sounds a bit less chunky than the SID, and has a silkier high end, perfect for polysynth applications. Congrats to the designers and developers! Quote Link to comment Share on other sites More sharing options...
crisp Posted May 17, 2008 Report Share Posted May 17, 2008 Under Item number: 130202520908 they also offer now single TDA 1543so you can grab as much as you need now...Happy Soldering ;D Quote Link to comment Share on other sites More sharing options...
swinkels Posted July 13, 2008 Report Share Posted July 13, 2008 nILS, what is current status of your PCB layout? Is it finished yet?Small building tip: New AVRs are running with internal 1MHz oscilator. To use external 24MHz oscilator please set 'clock source' fuse bits to 0000 (all bits programmed). Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.