technobreath

Just thought I'd shoot in a comment. I can't remember it being discussed in this thread. The MeanWell powersupply is: "Fixed switch frequency at 100KHz" - which is well above audible range. But it might be a bad idea to go there if you record or if it is possible that you will ever record it with those high sample rates, 192khz, no? It is IT and Med. equipment approved, but that does not automatically mean that this is suitable for musical applications... Just a heads up if some of u didn't think of it already. If building your own is an option - then have a look at this: http://www.murata-ps.com/data/power/oki-78sr.pdf <- switch frequency @ 500khz. I have seen similar ones @ 1 MHz too, but then it get a bit more spendy :P. This one is fairly cheap @ Mouser, but expensive in comparison to linear regulators bought from shanghai @ ebay :D. I have not much experience in building switchers. It's a bit more rocket sciency than the most basic linear designs, but not impossible at all if you read some d.sheets, app. notes. of course it helps if u know a thing or two about electronics. <- which can be learnt also :). I have learnt most of what I know from internet studies. But also from some electronics school books I got from a friend and also some from my brother way back - really helps you grow an instinct on how to seperate the good stuff from the bad stuff online. I also had VERY much help from many people @ midibox.org. So I know that: ... you don't need to go there - at least not in the long run. You probably buy one now (and we have no problems with that hehe), but I guarantee you will enjoy making your own once u get a bit more hang of the elctronics. EDIT: It has the DIN c64 power connector indeed. And it also got regulation circuit. BUT read the wikipedia site - it's all in there - there are several powering options, and not reading this, just assembling it and put the plug in and power it up is not a smart thing to do at all. You are partially right here. You are right, it gives you v5 and +/-12V. But SID 8580 and 6582 does NOT accept +12V without a fight. They need +9V. 6581 uses 12V. Also be aware of the powering specs of the -12v rail (depends on what you are using it for, but it might not be big enough). So basically what you can do is to leave the vregs on the PCBs where the 9v SIDs is gonna live, then feed it with all the 12v you want ;). It is important to think of PSU as a the whole circuit, not just the external stuff u buy or build -> there might be PSU components on the midibox pcbs also :). The C64 brick needs modifications? No, it just needs external regulator circuit to give u everything you need. I understood what you meant ytsestef, but I just wanted to clarify what you were saying. On MB6582, you have the luxury of setting it up for all kinds of powering options. It is described very well by Wilba in the wiki pages. Have a nice day / morning ;).

Dude, probably we can't expect more from these hehe. So it looks like the datasheet is wrong then... Interesting to know. Btw, don't tell missus I wad here, I am supposed to be at SARC. If she catches me in here I would probably end up in trouble :-p

I have eagle files on a rather compact bankstick x 8 board if u or any other are interested. I can mail em on request - just leave a PM. ;)

Man, this is a nice thread. And man, there has happened a lot with availability in good switched regulators since that thread started. I have previously said I would never be converted to do switchers instead of linear, but with the speeds of modern switchers, this all seems way more attractive to me than before. But in that thread there are lots of info if you are hungry for that. Another tip that I can give you - if we step away from the DIY (oof hehe) for a little while. Many people buy their power supplies anyway, so I gather it is OK hehe. My thought is - get someone to help you build it if you (after reading the thread) isn't able to build it yourself. You know any electronics students? or one that teaches it? Don't even need to know people - you could contact a school where they teach electronics - I bet designing and building a power supply like this would be an interesting project for at least a couple of students. Just a thought. But then again, I really really want to encourage you to learn this yourself. A basic powersupply is basically made out of 3 parts. 1: rectifier 2: smoothing caps (which is related to rectifiers) 3: regulation/protection. Regulators made out of ICs (most common around here at least) mostly has the protection you need in most cases (temp.shutdown, over current shutdown and so on). If you study these things - and there are a lot of online material - you should be able to construct your own. Be sure ALWAYS to use fuses though. IMPORTANT :). <- might not help you protect the circuit from getting "fried", but it will probably prevent fire :D. I have had myself a PCB on my bench cooking / frying becasue I had no fuse when there occured an error - haven't concluded what went wrong there yet, but we think it's a faulty vreg. That in combination with a big battery and no fuses made PCB cooking possible. EDIT/ADD: I have no idea how this works in USA, but in Norway I would make a phonecall to teacher / faculty bossy guy, and present my project / my intentions of calling him... http://www.ece.ucsd.edu/ No idea what kinda place this is - after all, I'm only a norse guy. But it looks like they are good enough equipped to help you out if they want to :).

Hmm... Well, if you got SIDs waiting for a good home and sammich is gone - then all you have to do is to build it with modules instead. No problem at all.

Yes and amen dude. I know of nobody else who would do what you do! :).

yeah dude. short answer is www.midibox-shop.com ;)

edited my previous post.

Edit: I might have interpreted original post the wrong way, therefore this post doesn't make sense anymore. All I'm saying - It's important that when u design and run bulk order, it is important to do it in an ethical way. I still stand by words, that your whole thing here can be interpreted the way I did, but if you say so I will take your word for it, so my appologies for being that hard. I still think you repsonded a very bad way to the critisism that u met. I'm saying one more thing - people who are on Tim's list, should really stand up to their commitment. When Tim get response from 1 out of 10, that is horrific statistics. Tim's services aint to be taken for granted!

yo electro. I totally understand the frustration you feel, and everyone can slip a few words in frustration, including smashtv, and also myself :P. I am sure you understand that your first post could seem a bit frustrating to Tim, who does everything he can to supply as fast as possible, at the same time trying to be fair to everyone, putting thousands of dollars into this etc. Here's my few words about my experience with Tim. 1. Always reliable 2. Service is far beyond excelent 3. Quality control way beyond what I have seen anywhere else 4. High standards 5. Fair If you deal with Tim I'm sure you will not be disappointed (though this has taken a bit longer than anyone want). By the way, it looks like the PCBs are now available in his shop. The last thing we need is a fight. And everyone is welcome to contribute of course, but I really think it's fair to give the guy who invested a lot of money in this a chance to get the boards shipped. I know you will not be disappointed when dealing with Tim ;). Have a nice summer evening ;).

Very pleasant to deal with you :). Good package etc.