moebius

A ground is a ground is a ground, it might not be "a ground", but an arbitrary voltage level/point on circuit, where all the other voltages are referenced. You'll anyway need a reference voltage between the circuits, so AIN will detect voltage between this reference point and what it sees in AIN, right? My guess for this reference point--- ground it is? Bye, Moebius p.s. Uhhuh-- sorry for this sorta short "informative" (?!) post. Think ground as a current return path.

Hi, You seem to have misinterpret how encoders work, maybe? Those are rotary switches in such arrangement, that direction (and amount) of the rotation can be detected. We're not talking about resistance values here. Bye, Moebius

Both ways are fine, really. So use the way that you find more convenient. Bye, M

Uhhuh, I THINK diode rectifier drops overall voltage by two silicon diode voltage drops, 2 x 0,7v. And normal AA cell batteries discharge to 1,2v voltage level from the nominal 1,5 volts.. So, basicly the voltage regulator "sees" might drop below the level it needs to do its job, before the batteries are really empty. Bye, Moebius

Damn! Don't reveal my sources!! (Great and simple stuff about LEDS there) Bye, M p.s. I have found good, but not great electronics tutorials online, opamp stuff ect. Sadly I haven't found anything that "sort of grows in depth" while your learning. Basicly, as said on SDIY a while ago, analogue electronics is about Ohm's law (U/R=I, UxI=P) and Kirchhoff's 2nd law (Currents entering the node equals currents leaving the node)

Hmm.. DC transformer and batteries? Good! You can leave -/ground/Vs connected all the time for both supplies and only switch between +/off/+. Both power supplies being pure DC you could also bypass diode rectifier on the core. (and if I remember right, your using AA cells: this is also preferable as diode voltage drops of the rectifier are kind of your enemy in this use. (And as batteries discharge, it's the voltage that drops)) Bye, Moebius

Or, maybe you should buy a Midibox? There might be some, on the eBaY?! bye, Moebius

Hell Yeah!! I'm gonna rumble like thunder on you, nonbelievers!! ...I'm not given the right MIOS has, still..uhuh. Me? Nah. Still upset. This is "No problem business" for anyone, I think. Bye, Moebius

I can only say, Good luck for selling Your flawed desing on eBay. Bye, Moebius

I think it's fair to build a box out of the SIDs you get and then sell them on eBay! ;D Bye, Moebius

I don't recommend any "contact sprays" - It's an eBay fix :D Works for a while and then it's worse than in the beginning. P&G site has some talk about it, using some special "silicon greace" ?!? Mechanical cleaning is the way to go + some nice lubricant. Bye, Moebius

Don't need beheriger-- DIY then :D

That's right, Steven ;D Anyway, nickca did it for MKS-80. Here's the forum link and you'll find edited mb64_meta.inc from there. http://69.56.171.55/~midibox/forum/index.php?topic=3181.msg21434#msg21434 That MUST be useful as I think all the needed SysEx data structures are there. Just modify it for your synth. I haven't checked how switches are treaded there. Those are 4-way slide switches on PG-800, I'm sure - something that's not so easy to come by. I'd probably use rotary switches. Bye, Moebius

Hi, Program the pic with MIOS "bootstrap loader" (explanation: http://www.ucapps.de/mios_bootstrap.html). Then you will have to upload the MIOS and then the firmware using midi. Bye, Moebius

Hehee, respect! ;) Bye, Moebius (albeit "force to scale" seems like implementation of the ideas originally presented in analog synth CV quantisizers and since then introduced to midi world, and "Latronic Notron" Scale Assing function seems similar enough to say, it's not unknown in hardware midi sequencers either)

Davo: And next you'll be buildin' his P3 seq and tellin' "how advanced it is" :'( ..uh, just had to say that, a similar view was expressed on Analogue Heaven mailing list yesterday by somebody that knows about midibox, but doesn't seem to have given a real consideration about MB_SEQ specs-- Well, P3 has "force to scale" function and "modulation accumulators" (seems to be a bit similar to MB_SID wavetables), but also 2x16 pots and 2x16 LCD ;D Thorsten if your reading this, was it so, that free codespace for Midibox SEQ is getting seriously limited *blink blink* ;D ---- Spider Room Labs (http://www.angelfire.com/geek/srlabs/) also has DIY Midi -> Din Sync devices too. I couldn't find better information about Sync-24 pulsewidth, than mention on Blacet site, that their conversion IC uses 5uS pulses. Bye, Moebius

Some pictures might help--- Â ::) I'm tired, so my logic might fail here... Â ceramic caps shouldn't be a problem here, ceramics come in different shapes and sizes (and are (not so) easily only to be mistaken for tantalums, that are polarized and usually have much larger capacitances). uh, AC or DC supplies? Gnd shorted to +5v thru some resistor connection, causing excessive current consumption (heating the regulator) and pulling PIC Gnd pin up? Bye, Moebius

...yeah, probably only thing to look for is the gain stability issue. Bye, Moebius

Hi, There's nothing wrong with boards that have multiple uses, I think. You'll need to connect only single ground connection, it should be a common reference point of the circuit, remember. Looking at your board layout, only two thing bother me, really: Awfully small trace from the CONN1 ground pin to the groundplane and groundplane width just under the PB6. Bye, Moebius

Hi people. I'm not that familiar with audiophoolisness, yet ;) I know there's lots of good stuff going on in the GroupDIY - I can see Gyraf selling "Boutique Audio" products and still contributing much to the DIY side. I'm more familiar with SynthDIY and must say I feel it's much more heterogeneous than you people seem to acknowledge. Anything between published schematics and PCB layouts to "Boutique synths", that you can also buy as kits (but you can't distribute any documentation that comes along). Yeah, some people sell kits and still publish schems and building instructions.. What unites these people with fairly different approaches is that there's ALWAYS a significant amount of research and knowledge behind everything... it being "done to death" transistor ladder filter or "integrator with reset" oscillator. Ok - not always, good examples are some Juergen Haible's designs (he's a german engineer with some resemblance with TK - doing it for fun, not quitting his day job for it :D), that ended up in Doepfers product catalog - can't say it's "fair use" anymore. This has hurt SDIYing, not only because JH doesn't publish all his schematics and documentation anymore, but also because he has done collaborations with M.A.M (Music and More, now subsidiary of Terratec) and Synthtech (MOTM fame) with fair licensing deals, I think. I don't know If my views are unethical or not - Still I'd like to courage people to pick up that soldering iron and doing some sloppy soldering. And to discourage people from picking up "that box from eBay" or Kiddos thinking "I can solder and do mee boards, I can sell it for profit". A product - it's not that dirty word, I think?! I have some ideas in my mind.. based on underlaying MIOS.. ;D Nothing "stock" anyway.. probably nothing that ever gets done, anyway. I don't have anything against any "products" coming from the midibox community - as long as it's approved by TK. But for "a product", please keep in mind that these usually have some sort of warranty, 1-3 years, I think?! The discussion here seem to point out "You can do it, so why don't you do it?" Still I can't see any "MB products" - anything on eBay that says "Yeah, it works. It will work for next 3 years, for sure". Still open for any discussion, still having my views.. Yet not selling boxes-- M

Hmm.. Sounds good. Someday someday... ;) Only got 5 pieces of gear and already having 21 outputs.. I'm not the one liking the small and compact mixers, but searching for "the sound" with plenty of easily reachable faders ect. Anyway, this sort of a keyboard/line mixers are pretty easy to DIY. Not going for over simple solutions - these are basicly (audio grade) opamp buffers on inputs with a summing opamp on the output. http://sound.westhost.com/project30.htm - shows plenty of the basic building blocks. Could be a nice addition to MISC section of the Forum? Bye, Moebius

True, so true. jamram: Your apology accepted from my side. I can't say I like all your rationalizations, but that's ok - This is still an open community and different views are accepted. On the other hand, you're smart enough to understand - this is not all about you or your actions, right? I really can't envy SmashTV's position as an active forum member and providing PCBs for the midibox Community. Each and everytime he opens "his big mouth" to defend DIY nature of the Midibox it goes down to this: "..but hey, Your directly profiting from this.." Having that said, I just happen to share some views about Midibox DIY nature with Smash.. as simple as that. It's not an hidden agenda - We just shout it out loud. And to clear things up - no, I don't have any PCBs from Tim, although I use his layouts for etching. He has done me some favours - and I find him as an all around good guy and easy to deal with. For those or anyone questioning Smash's position - maybe you don't need the board layouts he has done or anything - Still he and Mike/Claudia are "major players" in making Midibox the success it is or as accessible as it is today. And I think he's giving the best support for his PCBs for the time he finds to do so. This thing has come a long way since Smashes home etched PCBs to pro-quality solder-masked, silk-screened ones - Still I can assure You, that each detail was discussed between the creator (TK) and the PCB provider (Smash).. Everyone, feel free to argue or post your views! M

No no! I didn't mean it like THAT! If you need to ask a question or have problems, just ask. But even if your problem isn't about the reset pin anymore (I hope ;)), it's still about the GLCD. It's a bit special part, I don't know how many people use 'em - I don't. You presented the new problem here first and then went on posting it again, after about an hour and 15mins later - People do keep on eye on the forum, so I think if anyone knew the solution, they would have "chimed in". So basicly, posting about related problems under many topics won't give your problems more attention or faster responses ::) And I know, Your anxious to get that thing working - nothing bad about it, "so close, so far away".. ;) M

I'll second that. I feel like these are growing pains - 909 members on the forum 18. Jan 2004, now it's almost doubled. It seems pointless to talk about "current situation" or how Midibox project has gotten to the current state. For those who are genuinely interested, "Latest News" has at least a couple of important topics/threads. --- I still feel this is Midibox Community. Of course it isn't static. There are guys there, who can build a box "out of the documents", people who just started soldering, people who can program own applications, guys with visually amazing designs that run stock midibox code... ect. Now I'm just wondering what this Community needs? Permission to produce and sell midiboxes on eBay? Ready made "plug&play" MB modules? A new forum section for Flamewars? Uhh, I'm puzzled. If any of You have any worthy improvements in mind - Please, do start another thread. --- I have to thank Thorsten for making all this possible: He made a midi controller for himself, published it and interest towards it inspired him to create a whole modular hardware/software platform out of it. For free for all of us. How many of you could do the same or would do the same? It's his hobby, maybe we should keep it in hobby level too? Moebius

Hey, Try to limit starting too many new topics - it clutters the forum. This probably has to do with LCD layout and CS lines - I just noticed that TK has used display with 240x64 resolution (and screen layouts are optimized for that and that's also why there are 2 additional CS lines in the connection drawing.).. just wait for TK, he will be able to help. Bye, Moebius p.s. Hmm.. YaBB God = I just make so much noise ;) and by the way, I just picked up that reset -> +5v from the link you posted..