napierzaza Posted March 4, 2008 Report Share Posted March 4, 2008 Hello, I have two 6851s and I am going to try and build a double SID module. I was going to build a SEQ so I have a lot of the parts already, but I realize that I'm missing a couple, pretty important parts. Namely 4 Stryoflex caps (470pf) and 2 Transistors (BC547). I can basically re-purpose a lot of my other parts to work as I already have some DOUT 74HCs, and I believe the SIDs are as wide as the PICs, so I can just cut up some 40-pin IC sockets to work etc. So anyway, considering last time I had to pay 60$ to ship my stuff from Mouser, I was wondering if anyone here had just those parts that they could mail to me in Canada? I can pay you for everything, but it's just going to be cheaper if you stuff them in an envelope for me in place of having a box shipped.Here's a pic of the board I designed based on Wilba's wiring. I excluded the J10 connection as I am going to just straight connect with a ribbon cable like the FM controls. The pins are way too splayed out to be worth while.EDIT: Removed one-sided .brd file as it is updated belowMBHP-DoubleSID 2SIDED SIL.brd.zipMBHP-DoubleSID 2SIDED SIL.brd.zip Quote Link to comment Share on other sites More sharing options...
LenweTasasartir Posted March 4, 2008 Report Share Posted March 4, 2008 It looks great for me. Is there any way to persuade you to make version with J10? ;) Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 4, 2008 Author Report Share Posted March 4, 2008 I guess it's possible, but it would require several bridges, which are just as time consuming as a direct connection underneath. And the J10 would not be completely compatible and the core would have to have one trace moved into another place. If it was a double-sided board it would be very easy and very nice, but I made it for myself, and I only have access to copper-clad boards. I wish I could have a smash board but I just don't have the facilities.The list of pins to connect are the following:Pin 8 (SID A) ---> Pin 24 PICPin 8 (SID B) ---> Pin 22 PICPin 6 (SID) ---> Pin 17 PICPin 12 (both 74HC) ---> Pin 23 PICPin 11 (both 74HC) ---> Pin 28 PICPin 14 (74HC A) ---> Pin 29 PIC Quote Link to comment Share on other sites More sharing options...
LenweTasasartir Posted March 4, 2008 Report Share Posted March 4, 2008 Thanks for connecting scheme. I've taken a deeper look at Your board - It's really inpossible without huge amount of bridges or double-sided board.I think, that You have made great work ;) I'll use it in near future! Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 5, 2008 Author Report Share Posted March 5, 2008 Here's an attached file of the board. I looked again at having a J10 connection, like maybe a SIL or something, but it is still really difficult. Basically you'd have to just do 6 jumpers to the connector, and would still have to modify the core.Here's a Bird copy of the board. Quote Link to comment Share on other sites More sharing options...
nILS Posted March 5, 2008 Report Share Posted March 5, 2008 Nice work napierzaza. I've see some minor room for improvements though:* Make sure you can actually find 2200µF caps in 10.5mm diameter before etching the board - the smallest ones I've see so far are 13mm* You can easily move away the caps from under the SIDs * Some components (like C9 for instance) are better off rotated by 180° - that way they're not as much in the way of your traces.;-) Quote Link to comment Share on other sites More sharing options...
Goblinz Posted March 5, 2008 Report Share Posted March 5, 2008 I guess it's possible, but it would require several bridges, which are just as time consuming as a direct connection underneath. And the J10 would not be completely compatible and the core would have to have one trace moved into another place. If it was a double-sided board it would be very easy and very nice, but I made it for myself, and I only have access to copper-clad boards. I wish I could have a smash board but I just don't have the facilities.The list of pins to connect are the following:Pin 8 (SID A) ---> Pin 24 PICPin 8 (SID B) ---> Pin 22 PICPin 6 (SID) ---> Pin 17 PICPin 12 (both 74HC) ---> Pin 23 PICPin 11 (both 74HC) ---> Pin 28 PICPin 14 (74HC A) ---> Pin 29 PIC You can get double sided copper clad boards. Anybody else who is wanting to include J10 and wants to mess around could look in to adaptin the design. G Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 5, 2008 Author Report Share Posted March 5, 2008 Thanks for the suggestions, I'm implementing them now, and giving the board more breathing room because of it. The caps were under the SIDs out of convenience, but I did move them out from under just cause it might save someone some time when building.I know there are dual sided boards, I just don't have any. I might just go ahead and work on a double layer design, but people would still have to modify the core.EDIT: Here it is, with a SIL Connector that should easily turn into a DIL J10 connector. I wish that I could make such a board. But anyhow it has most of your improvements. Now I just wish that I could make myself a double - sided one. Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 5, 2008 Author Report Share Posted March 5, 2008 So I think that's the final version above, note that both grounds are separated, and it's about 5x5. Quote Link to comment Share on other sites More sharing options...
Pascal Posted March 7, 2008 Report Share Posted March 7, 2008 Thats great work :-)In Eagle has the Layout many other Connections!?Here a pic: Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 7, 2008 Author Report Share Posted March 7, 2008 I've never really understood how to do the ground if it's covered in a ground plane. So I make small 16 sized connections for them all, sometimes they're cut, but still maintain continuity and connection to ground via the ground plane. So I guess before you fill it looks a little messy. Quote Link to comment Share on other sites More sharing options...
Jaicen Posted March 8, 2008 Report Share Posted March 8, 2008 I know what you mean. Certain programs like ExpressPCB seem to just use via's as the ground connection, which is not always ideal really. Well, maybe it is, but I don't really have a great deal of experience with ground plane or double sided layouts just yet! I don't suppose you could upload a ready to print PCB layout could you?? I'd definitely like to give your single sided board a go, and i'm at work now so I have access to a laser printer ;) Quote Link to comment Share on other sites More sharing options...
LenweTasasartir Posted March 8, 2008 Report Share Posted March 8, 2008 Wops, i had same problem with board and thinked, that Linux version of Eagle had some problem with rendering it, so I have been waiting for access to some Windows machine to print it... Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 8, 2008 Author Report Share Posted March 8, 2008 I had to clean up the single layered one a bit. Here it is.Double SID.pdfDouble SID.pdf Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 8, 2008 Author Report Share Posted March 8, 2008 ACtually, I believe the dual-layered version has about the same amount of bridges needed if you're not making a double-layered board. However I guess it requires more drilling as the interconnections to the core would require holes (if using the SIL connector)EDIT: removed my copies for printing see below Quote Link to comment Share on other sites More sharing options...
LenweTasasartir Posted March 8, 2008 Report Share Posted March 8, 2008 Thanks, napierzaza, for re-posting corrected boards. But your PDFs aren't usefull in this moment, becouse it contains only big black fields...I attach ready-to-print pictures made from Your colour ones. Quote Link to comment Share on other sites More sharing options...
Jaicen Posted March 8, 2008 Report Share Posted March 8, 2008 Sweet, thanks a lot for doing that! I'll be getting my print on tomorrow I think!!!Comparing the double and single sided layouts, I can't see any advantage at all with the dual layer if you're etching yourself. There are a few bridges to make, but that's hardly the end of the world! Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 9, 2008 Author Report Share Posted March 9, 2008 I'm not sure what you mean, I looked at me PDF of the image and it was the same as yours. As for those PNGs, they are just screen captures to show what the board looks like. At any rate your posting is as good. Quote Link to comment Share on other sites More sharing options...
LenweTasasartir Posted March 9, 2008 Report Share Posted March 9, 2008 I've checked - topside is same as mine, but problem is with "underside.pdf".I attach two pictures, first from Evince, second from Acrobat Reader 8.It looks like mirrored topside without holes. Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 9, 2008 Author Report Share Posted March 9, 2008 Those are copies of the topside. But shouldn't the topside be mirrored? I may not. Hrrmmm. Also, I did never add the holes, because I could never find the right ones Quote Link to comment Share on other sites More sharing options...
LenweTasasartir Posted March 9, 2008 Report Share Posted March 9, 2008 But this one is in Your PDF ;) Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 10, 2008 Author Report Share Posted March 10, 2008 How about this one? I made it as "upside down" because I'm pretty sure you need to print it off that way because it's not pre-reversed like the underside in EAGLE.TOPSIDE.pdfTOPSIDE.pdf Quote Link to comment Share on other sites More sharing options...
LenweTasasartir Posted March 10, 2008 Report Share Posted March 10, 2008 But there is no problem with topside. I've posted underside printscreens. Quote Link to comment Share on other sites More sharing options...
napierzaza Posted March 10, 2008 Author Report Share Posted March 10, 2008 Those two pictures above that you posted are topsides. I'm confused Quote Link to comment Share on other sites More sharing options...
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